Slewing Bearing Archives - ZZ Slewing Bearing

Slewing Ring Turntable – Precision Bearings for Smooth Rotation

andy — Wed, 03 Sep 2025 08:56:54 +0000

Slewing ring turntable bearings are essential components designed to support heavy loads while enabling precise rotation. As industries demand compact yet powerful solutions, these bearings have become vital in applications ranging from automation to construction. Their ability to combine load capacity and rotational accuracy makes them indispensable in modern machinery.

Structural Design and Load Capacity

Slewing ring turntable bearings typically use a four-point contact ball or cross roller design. The four-point contact structure ensures smooth motion with high axial and radial capacity, while the cross roller type enhances rigidity and precision. Consequently, engineers can choose the structure that best matches their performance requirements.

NO.	De	D	d	H	b	m	z	x	k	Normalizing	Q&T	KG
131.25.500	664	634	366	148	80	5	130	0.5	0.1	50	67	211
132.25.500	664.8	634	366	148	80	6	108	0.5	0.1	60	80	210
131.25.560	724	694	426	148	80	5	142	0.5	0.1	50	67	236
132.25.560	724.8	694	426	148	80	6	118	0.5	0.1	60	80	235
131.25.630	808.8	764	496	148	80	6	132	0.5	0.1	60	80	275
132.25.630	806.4	764	496	148	80	8	98	0.5	0.1	80	110	270
131.25.710	886.8	844	576	148	80	6	145	0.5	0.1	60	80	310
132.25.710	886.4	844	576	148	80	8	108	0.5	0.1	80	110	306
131.32.800	1006.4	964	636	182	120	8	123	0.5	0.1	121	167	515
132.32.800	1008	964	636	182	120	10	98	0.5	0.1	151	209	512
131.32.900	1102.4	1064	736	182	120	8	135	0.5	0.1	121	167	577
132.32.900	1108	1064	736	182	120	10	108	0.5	0.1	151	209	591
131.32.1000	1218	1164	836	182	120	10	119	0.5	0.1	151	209	662
132.32.1000	1221.5	1164	836	182	120	12	99	0.5	0.1	181	251	662
131.32.1120	1338	1284	956	182	120	10	131	0.5	0.1	151	209	746
132.32.1120	1341.6	1284	956	182	120	12	109	0.5	0.1	181	251	746
131.40.1250	1509.6	1445	1055	220	150	12	123	0.5	0.1	229	314	1194
132.40.1250	1509.2	1445	1055	220	150	14	105	0.5	0.1	263	366	1183
131.40.1400	1665.6	1595	1205	220	150	12	136	0.5	0.1	229	314	1364
132.40.1400	1663.2	1595	1205	220	150	14	116	0.5	0.1	263	366	1345
131.40.1600	1873.2	1795	1405	220	150	14	131	0.5	0.1	263	366	1577
132.40.1600	1868.8	1795	1405	220	150	16	114	0.5	0.1	302	417	1545
131.40.1800	2069.1	1995	1605	220	150	14	145	0.5	0.1	263	366	1766
132.40.1800	2076.8	1995	1605	220	150	16	127	0.5	0.1	302	417	1782
131.20.2000	2236.8		1853	132	106	16	137	0.5	0.1		311	958
131.25.2000	2268.8		1819	147	117	16	139	0.5	0.1		326	1277
131.45.2000	2300.8	2221	1779	231	160	16	141	0.5	0.1	322	445	2254
132.45.2000	2300.4	2221	1779	231	160	18	125	0.5	0.1	362	501	2235
131.25.2240	2516.4		2059	147	117	18	137	0.5	0.1		366	1447
131.32.2240	2552.4		2022	181	139	18	139	0.5	0.1		435	2074
131.45.2240	2556.8	2461	2019	231	160	16	157	0.5	0.1	322	445	2626
132.45.2240	2552.4	2461	2019	231	160	18	139	0.5	0.1	362	501	2584
131.25.2500	2786.4		2319	147	117	18	152	0.5	0.1		366	1645
131.32.2500	2822.4		2282	181	139	18	154	0.5	0.1		435	2373
131.45.2500	2822.4	2721	2279	231	160	18	154	0.5	0.1	362	501	2925
132.45.2500	2816	2721	2279	231		20	138	0.5	0.1	402	556	2867
131.25.2800	3096		2619	147	117	20	152	0.5	0.1	203	407	1874
131.32.2800	3136		2582	181	139	20	154	0.5	0.1		483	2705
131.40.2800	3136		2562	220	170	20	154	0.5	0.1		591	3430
131.45.2800	3110.4	3021	2579	231	160	18	170	0.5	0.1	362	501	3221
132.45.2800	3116	3021	2579	231	160	20	153	0.5	0.1	402	556	3233
131.32.3150	3476		2932	181	139	20	171	0.5	0.1		483	2969
131.40.3150	3515.6		2912	220	170	22	157	0.5	0.1		650	4003
131.50.3150	3536	3432	2868	270	180	20	174	0.5	0.1	452	626	5276
132.50.3150	3537.6	3432	2868	270	180	22	158	0.5	0.1	498	689	5260
131.32.3550	3889.6		3332	181	139	22	174	0.5	0.1		532	3411
131.40.3550	3911.6		3312	220	170	22	175	0.5	0.1		650	4468
131.50.3550	3936	3832	3268	270	180	20	194	0.5	0.1	452	626	5998
132.50.3550	3933.6	3832	3268	270	180	22	176	0.5	0.1	498	689	5944
131.32.4000	4351.6		3782	181	139	22	195	0.5	0.1		531	3940
131.40.4000	4363.2		3762	220	170	24	179	0.5	0.1		710	5045
131.50.4000	4395.6	4282	3718	270	180	22	197	0.5	0.1	498	689	6833
132.50.4000	4395	4282	3718	270	180	25	173	0.5	0.1	565	783	6772
131.40.4500	4867.2		4262	220	170	24	200	0.5	0.1		710	5681
131.50.4500	4901.6	4782	4218	270	180	22	220	0.5	0.1	498	689	7809
132.50.4500	4895	4782	4218	270	180	25	193	0.5	0.1	565	783	7674

Materials and Durability

Manufactured from high-grade alloy steel, each bearing undergoes heat treatment and precision machining to achieve optimal strength. In addition, specialized seals protect the internal raceways from dust, dirt, and moisture. Therefore, slewing ring turntable bearings deliver long service life and stable performance in harsh conditions.

Applications Across Industries

Turntable slewing bearings serve diverse sectors. In robotics, they enable accurate joint movement and repeatable positioning. In automation and material handling, they provide smooth rotation for conveyors and assembly systems. Furthermore, in construction equipment, they support rotating platforms and lifting devices. This versatility highlights their value across multiple industries.

Performance Advantages

High precision for smooth, accurate motion
Compact structure with excellent load capacity
Long service life with minimal maintenance
Protection against harsh environmental conditions
Flexible design for robotics, automation, and heavy equipment

Why Choose Slewing Ring Turntable Bearings

Industries seek efficiency, safety, and reduced downtime. By selecting slewing ring turntable bearings, operators ensure reliability in critical applications. In addition, their strong load-handling ability supports productivity in manufacturing, logistics, and construction projects. For further engineering data, refer to Engineering Toolbox resources.

Conclusion

In conclusion, slewing ring turntable bearings combine strength, precision, and durability. They deliver smooth rotation and high performance across robotics, material handling, and construction. Consequently, they remain a trusted solution for industries requiring reliable rotational systems.

The post Slewing Ring Turntable – Precision Bearings for Smooth Rotation appeared first on ZZ Slewing Bearing.

Slewing Bearings for Crane – Heavy-Duty & Reliable Rotation

andy — Thu, 28 Aug 2025 02:58:57 +0000

Slewing bearings for crane are critical components that ensure smooth rotation, reliable lifting, and stable operation under extreme loads. These bearings connect the crane’s superstructure to its undercarriage, enabling 360° rotation while supporting heavy lifting tasks. Their strength and precision make them indispensable in mobile cranes, tower cranes, and construction equipment.

Structural Advantages

Cranes require slewing bearings that can manage multiple load types. Double row ball slewing bearings handle medium to heavy axial and radial loads, while three row roller slewing bearings are designed for extreme lifting demands. The three row design distributes axial, radial, and tilting moment loads evenly, which enhances safety and performance during crane operations.

NO.	De	D	d	H	b	m	z	x	k	Normalizing	Q&T	KG
131.25.500	664	634	366	148	80	5	130	0.5	0.1	50	67	211
132.25.500	664.8	634	366	148	80	6	108	0.5	0.1	60	80	210
131.25.560	724	694	426	148	80	5	142	0.5	0.1	50	67	236
132.25.560	724.8	694	426	148	80	6	118	0.5	0.1	60	80	235
131.25.630	808.8	764	496	148	80	6	132	0.5	0.1	60	80	275
132.25.630	806.4	764	496	148	80	8	98	0.5	0.1	80	110	270
131.25.710	886.8	844	576	148	80	6	145	0.5	0.1	60	80	310
132.25.710	886.4	844	576	148	80	8	108	0.5	0.1	80	110	306
131.32.800	1006.4	964	636	182	120	8	123	0.5	0.1	121	167	515
132.32.800	1008	964	636	182	120	10	98	0.5	0.1	151	209	512
131.32.900	1102.4	1064	736	182	120	8	135	0.5	0.1	121	167	577
132.32.900	1108	1064	736	182	120	10	108	0.5	0.1	151	209	591
131.32.1000	1218	1164	836	182	120	10	119	0.5	0.1	151	209	662
132.32.1000	1221.5	1164	836	182	120	12	99	0.5	0.1	181	251	662
131.32.1120	1338	1284	956	182	120	10	131	0.5	0.1	151	209	746
132.32.1120	1341.6	1284	956	182	120	12	109	0.5	0.1	181	251	746
131.40.1250	1509.6	1445	1055	220	150	12	123	0.5	0.1	229	314	1194
132.40.1250	1509.2	1445	1055	220	150	14	105	0.5	0.1	263	366	1183
131.40.1400	1665.6	1595	1205	220	150	12	136	0.5	0.1	229	314	1364
132.40.1400	1663.2	1595	1205	220	150	14	116	0.5	0.1	263	366	1345
131.40.1600	1873.2	1795	1405	220	150	14	131	0.5	0.1	263	366	1577
132.40.1600	1868.8	1795	1405	220	150	16	114	0.5	0.1	302	417	1545
131.40.1800	2069.1	1995	1605	220	150	14	145	0.5	0.1	263	366	1766
132.40.1800	2076.8	1995	1605	220	150	16	127	0.5	0.1	302	417	1782
131.20.2000	2236.8		1853	132	106	16	137	0.5	0.1		311	958
131.25.2000	2268.8		1819	147	117	16	139	0.5	0.1		326	1277
131.45.2000	2300.8	2221	1779	231	160	16	141	0.5	0.1	322	445	2254
132.45.2000	2300.4	2221	1779	231	160	18	125	0.5	0.1	362	501	2235
131.25.2240	2516.4		2059	147	117	18	137	0.5	0.1		366	1447
131.32.2240	2552.4		2022	181	139	18	139	0.5	0.1		435	2074
131.45.2240	2556.8	2461	2019	231	160	16	157	0.5	0.1	322	445	2626
132.45.2240	2552.4	2461	2019	231	160	18	139	0.5	0.1	362	501	2584
131.25.2500	2786.4		2319	147	117	18	152	0.5	0.1		366	1645
131.32.2500	2822.4		2282	181	139	18	154	0.5	0.1		435	2373
131.45.2500	2822.4	2721	2279	231	160	18	154	0.5	0.1	362	501	2925
132.45.2500	2816	2721	2279	231		20	138	0.5	0.1	402	556	2867
131.25.2800	3096		2619	147	117	20	152	0.5	0.1	203	407	1874
131.32.2800	3136		2582	181	139	20	154	0.5	0.1		483	2705
131.40.2800	3136		2562	220	170	20	154	0.5	0.1		591	3430
131.45.2800	3110.4	3021	2579	231	160	18	170	0.5	0.1	362	501	3221
132.45.2800	3116	3021	2579	231	160	20	153	0.5	0.1	402	556	3233
131.32.3150	3476		2932	181	139	20	171	0.5	0.1		483	2969
131.40.3150	3515.6		2912	220	170	22	157	0.5	0.1		650	4003
131.50.3150	3536	3432	2868	270	180	20	174	0.5	0.1	452	626	5276
132.50.3150	3537.6	3432	2868	270	180	22	158	0.5	0.1	498	689	5260
131.32.3550	3889.6		3332	181	139	22	174	0.5	0.1		532	3411
131.40.3550	3911.6		3312	220	170	22	175	0.5	0.1		650	4468
131.50.3550	3936	3832	3268	270	180	20	194	0.5	0.1	452	626	5998
132.50.3550	3933.6	3832	3268	270	180	22	176	0.5	0.1	498	689	5944
131.32.4000	4351.6		3782	181	139	22	195	0.5	0.1		531	3940
131.40.4000	4363.2		3762	220	170	24	179	0.5	0.1		710	5045
131.50.4000	4395.6	4282	3718	270	180	22	197	0.5	0.1	498	689	6833
132.50.4000	4395	4282	3718	270	180	25	173	0.5	0.1	565	783	6772
131.40.4500	4867.2		4262	220	170	24	200	0.5	0.1		710	5681
131.50.4500	4901.6	4782	4218	270	180	22	220	0.5	0.1	498	689	7809
132.50.4500	4895	4782	4218	270	180	25	193	0.5	0.1	565	783	7674

Durability and Materials

Each slewing bearing is manufactured from high-strength alloy steel, treated with heat-hardening processes to resist wear and fatigue. Precision machining ensures smooth rolling, while robust seals protect against dirt, moisture, and construction debris. This reduces downtime and extends service life, even under harsh site conditions.

Applications in Cranes

In crane applications, slewing bearings are responsible for stability, rotation, and safe lifting. During operation, they distribute stress evenly across the structure, protecting both the crane and its load. For example, in tower cranes, slewing bearings allow precise control over heavy materials at great heights. In mobile cranes, they enable stable lifting on uneven surfaces. Without these bearings, cranes would not be able to deliver safe and efficient lifting performance (learn more about cranes on ZZ).

Performance Benefits

Smooth and precise 360° rotation
High load-bearing capacity for heavy-duty lifting
Enhanced operator safety with balanced stress distribution
Extended service life through wear-resistant materials
Reduced maintenance from advanced sealing systems

Why Choose Slewing Bearings for Crane

Downtime in crane operations can cause costly delays. High-quality slewing bearings minimize risk by delivering reliable rotation and load handling. They provide stability and efficiency in demanding lifting tasks, making them a smart investment for construction and industrial projects.

Summary

Slewing bearings for crane deliver strength, durability, and reliability in heavy lifting applications. By supporting extreme loads and ensuring smooth rotation, these bearings play a vital role in crane safety and performance. For a deeper understanding of their role in heavy machinery,

The post Slewing Bearings for Crane – Heavy-Duty & Reliable Rotation appeared first on ZZ Slewing Bearing.

ZZ Slewing Bearing Installation & Maintenance Guide

andy — Tue, 19 Aug 2025 02:00:01 +0000

ZZ slewing bearings play a vital role in heavy engineering machinery. Their performance depends not only on design and quality but also on proper installation and maintenance. This guide covers key practices for double row ball and three row roller bearings used in excavators, cranes, concrete pumps, and aerial platforms.

NO.	De	D	d	H	b	m	z	x	k	Q&T	KG
011.20.400	499		325	55	46	5	97	+0.5	0.1	44	37
011.20.450	554		369	55	46	5	108	+0.5	0.1	44	41
011.30.500	629	602	398	80	60	5	123	+0.5	0.1	52	89
012.30.500	628.8	602	398	80	60	6	102	+0.5	0.1	62	89
011.20.560	670.8		479	55	46	6	109	+0.5	0.1	53	56
011.30.560	689	662	458	80	60	5	135	+0.5	0.1	52	100
012.30.560	688.8	662	458	80	60	6	112	+0.5	0.1	62	100
011.20.630	742.8		543	55	46	6	121	+0.5	0.1	53	64
011.30.630	772.8	732	528	80	60	6	126	+0.5	0.1	62	118
012.30.630	774.4	732	528	80	60	8	94	+0.5	0.1	83	118
011.20.710	820.8		623	55	46	6	134	+0.5	0.1	53	70
011.30.710	850.8	812	608	80	60	6	139	+0.5	0.1	62	131
012.30.710	854.4	812	608	80	60	8	104	+0.5	0.1	83	131
011.25.764	886.8		671	63	54	6	145	+0.5	0.1	63	100
011.20.800	930	894	704	70	50	6	154	-0.5	0		120
012.20.800	936	894	704	70	50	8	116	-0.5	0		120
011.25.800	942	904	692	78	58	6	156	-0.5	0		150
012.25.800	952	904	692	78	58	8	118	-0.5	0		154
011.40.800	966.4	922	678	100	80	8	118	+0.5	0.1	111	219
012.40.800	968	922	678	100	80	10	94	+0.5	0.1	140	219
011.25.900	1048	1004	792	78	58	8	130	-0.5	0		170
012.25.900	1060	1004	792	78	58	10	105	-0.5	0		176
011.40.900	1062.4	1022	778	100	80	8	130	+0.5	0.1	111	244
012.40.900	1068	1022	778	100	80	10	104	+0.5	0.1	140	244
011.25.980	1110.4		887	63	54	8	136	+0.5	0.1	83	130
011.25.1000	1152	1104	892	78	58	8	143	-0.5	0		191
012.25.1000	1160	1104	892	78	58	10	115	-0.5	0		194
011.35.1000	1160	1120	876	90	70	8	144	-0.5	0		238
012.35.1000	1170	1120	876	90	70	10	116	-0.5	0		244
011.40.1000	1188	1122	878	100	80	10	116	+0.5	0.1	140	294
012.40.1000	1185.6	1122	878	100	80	12	96	+0.5	0.1	167	284
011.25.1120	1278		1013	79	70	10	125	+0.5	0.1	135	191
011.35.1120	1300	1240	996	90	70	10	129	-0.5	0		286
012.35.1120	1308	1240	996	90	70	12	108	-0.5	0		289
011.40.1120	1298	1242	998	100	80	10	127	+0.5	0.1	140	318
012.40.1120	1305.6	1242	998	100	80	12	106	+0.5	0.1	167	318
011.30.1180	1338		1068	79	70	10	131	+0.5	0.1	129	238
011.25.1250	1408		1143	79	70	10	138	+0.5	0.1	135	232
011.35.1250	1430	1370	1126	90	70	10	142	-0.5	0		317
012.35.1250	1440	1370	1126	90	70	12	119	-0.5	0		324
011.40.1250	1450	1390	1108	102	80	10	144	-0.5	0		416
012.40.1250	1452	1390	1108	102	80	12	120	-0.5	0		412
011.45.1250	1449.6	1390	1110	110	90	12	118	+0.5	0.1	188	438
012.45.1250	1453.2	1390	1110	110	90	14	101	+0.5	0.1	219	438
011.30.1320	1497.6		1208	89	80	12	122	+0.5	0.1	176	313
011.35.1400	1584	1520	1276	90	70	12	131	-0.5	0		354
012.35.1400	1596	1520	1276	90	70	14	113	-0.5	0		364
011.40.1400	1608	1540	1258	102	80	12	133	-0.5	0		470
012.40.1400	1610	1540	1258	102	80	14	114	-0.5	0		465
011.40.1400	1593.6		1266	94	85	12	130	+0.5	0.1	187	424
011.45.1400	1605.6	1540	1260	110	90	12	131	+0.5	0.1	188	501
012.45.1400	1607.2	1540	1260	110	90	14	112	+0.5	0.1	219	501
011.30.1500	1677.6		1388	89	80	12	137	+0.5	0.1	176	355
011.40.1600	1803.2		1466	94	85	14	126	+0.5	0.1	218	503
011.40.1600	1812	1740	1458	102	80	12	150	-0.5	0		554
012.40.1600	1820	1740	1458	102	80	14	129	-0.5	0		561
011.45.1600	1817.2	1740	1460	110	90	14	127	+0.5	0.1	219	584
012.45.1600	1820.8	1740	1460	110	90	16	111	+0.5	0.1	250	584
011.50.1600	1824	1762	1434	124	100	12	151	-0.5	0		750
012.50.1600	1834	1762	1434	124	100	14	130	-0.5	0		763
011.40.1800	1999.2		1666	94	85	14	140	+0.5	0.1	218	558
011.40.1800	2016	1940	1658	102	80	14	143	-0.5	0		612
012.40.1800	2032	1940	1658	102	80	16	126	-0.5	0		637
011.45.1800	2013.2	1940	1660	110	90	14	141	+0.5	0.1	219	652
012.45.1800	2012.8	1940	1660	110	90	16	123	+0.5	0.1	250	639
011.50.1800	2044	1964	1634	124	100	14	145	-0.5	0		887
012.50.1800	2048	1964	1634	124	100	16	127	-0.5	0		885
011.50.1900	2139.2	2139.2	1729	109	100	14	150	+0.5	0.1	257	861
011.60.2000	2268.8	2178	1825	144	120	16	139	+0.5	0.1	333	1202
012.60.2000	2264.4	2178	1825	144	120	18	123	+0.5	0.1	375	1169
011.50.2130	2380.8	2380.8	1959	109	100	16	146	+0.5	0.1	294	978
011.60.2240	2492.8	2418	2065	144	120	16	153	+0.5	0.1	333	1294
012.60.2240	2498.4	2418	2065	144	120	18	136	+0.5	0.1	375	1294
011.50.2355	2604.8	2604.8	2184	109	100	16	160	+0.5	0.1	294	1075
011.60.2500	2768.4	2678	2325	144	120	18	151	+0.5	0.1	375	1509
012.60.2500	2776	2678	2325	144		20	136	+0.5	0.1	418	1509
011.50.2645	2892.8	2892.8	2474	109	100	16	178	+0.5	0.1	294	1199
011.60.2800	3074.4	2978	2625	144	120	18	168	+0.5	0.1	375	1696
012.60.2800	3076	2978	2625	144	120	20	151	+0.5	0.1	418	1696
011.75.3150	3476	3376	2922	174	150	20	171	+0.5	0.1	522	2873
012.75.3150	3471.6	3376	2922	174	150	22	155	+0.5	0.1	574	2873

During installation, precise alignment is critical. Misalignment can cause uneven load distribution, reduce rotation efficiency, and accelerate wear. Engineers must ensure that mounting surfaces are flat and clean. Bolts should be tightened according to recommended torque specifications to prevent loosening during operation. Additionally, ZZ bearings include seals that must be checked for integrity before installation to protect against dust and moisture ingress.

Maintenance is equally important. Lubrication keeps rolling elements moving smoothly, reducing friction and wear. ZZ recommends periodic inspection for signs of corrosion, cracks, or excessive play. Promptly addressing issues prevents downtime and ensures machinery safety. Moreover, regular bolt inspections maintain structural stability and rotational precision.

ZZ bearings are engineered with high-quality steel, precision-machined raceways, and advanced heat treatment, which provide durability and load-handling capability. Combined with proper installation and routine maintenance, these bearings deliver reliable performance even under harsh working conditions. Operators can achieve smooth rotation, high efficiency, and long service life.

In conclusion, following ZZ installation and maintenance practices maximizes bearing performance and extends operational longevity. Proper handling ensures that excavators, cranes, and other heavy machinery operate safely and efficiently. Choosing ZZ guarantees quality, reliability, and support for critical engineering applications.

The post ZZ Slewing Bearing Installation & Maintenance Guide appeared first on ZZ Slewing Bearing.

ZZ Double Row Ball & Three Row Roller Slewing Bearings

andy — Mon, 18 Aug 2025 03:33:31 +0000

ZZ’s double row ball and three row roller slewing bearings provide reliable performance for heavy construction and industrial machinery. Engineers use these bearings in excavators, cranes, concrete pumps, and aerial work platforms. They ensure smooth rotation while supporting high loads.

The double row ball slewing bearings use two rows of high-strength balls on precision-machined raceways. This design handles both axial and radial loads efficiently. It also delivers stable rotation for turntables, platforms, and rotating tables. The three row roller bearings feature three rows of rollers. They distribute radial, axial, and tilting moment loads evenly. As a result, these bearings excel in the most demanding applications.

ZZ constructs each bearing from hardened, high-quality steel. Engineers apply advanced heat treatment to improve wear resistance. The bearings also include seals that prevent dust, dirt, and moisture from entering. These features reduce maintenance needs and extend service life. Moreover, ZZ provides multiple sizes and specifications. This flexibility fits a wide range of machinery, from small excavators to large cranes.

Customers rely on ZZ because of its commitment to quality and precision. Each bearing undergoes strict testing to ensure performance under dynamic and heavy loads. Therefore, operators experience smooth rotation, higher efficiency, and less downtime. In addition, the robust design and precise engineering guarantee long-term durability.

ZZ slewing bearings combine reliability and safety. For example, on cranes and concrete pumps, these bearings maintain stability during operation. They also improve machine productivity by handling extreme loads without failure. In short, choosing ZZ bearings ensures your machinery runs efficiently. Operators benefit from reduced maintenance, better safety, and enhanced performance.

To summarize, ZZ double row ball and three row roller slewing bearings offer top performance in engineering machinery. They support heavy loads, rotate smoothly, and last longer. With ZZ, manufacturers and operators gain high-quality bearings that optimize operational efficiency, stability, and safety.

The post ZZ Double Row Ball & Three Row Roller Slewing Bearings appeared first on ZZ Slewing Bearing.

Single row four point contact ball internal gear flange type slewing bearing

andy — Fri, 16 May 2025 03:33:00 +0000

The single-row four-point contact ball type internal gear flange slewing bearing is a high-performance solution designed to meet the demanding requirements of various heavy-duty applications. This slewing bearing features a four-point contact ball arrangement, which ensures smooth, efficient rotation while distributing loads evenly across the bearing. The internal gear design enhances the rotational capability and allows for more efficient transfer of torque, making it ideal for machinery that requires consistent and reliable movement.

The flange structure of the bearing offers easy installation and excellent stability, allowing for quick assembly in equipment with limited space. The combination of a robust internal gear mechanism and the flange mounting system makes it particularly suitable for applications such as cranes, excavators, turntables, and other large-scale rotating equipment. The bearing is designed to handle high axial, radial, and tilting moment loads, ensuring it performs under even the most challenging operating conditions.

INA	Rothe Erde	TG	Da	D	d	H	nl	Φ1	m	z	Weigt kg
VLI200414N ZT			325	518	350	56	8	18	5	67	28.5
VLI 20 0414N ZT RL2			325	518	350	56	8	18	5	67	36.299999999999997
VLI200414N			325	518	350	56	8	18	5	67	27.5
	232.20.0400.013		326.5	518		56	8	18	5	67	27.1
	232.20.0400.503		326.5	518		56	16	18	5	67	26.9
	232.21.0475.013		326.5	517		56	8	18	5	67	27.1
		I.505.20.00.C	326.5	518		56	8	18	5	67	35.4
VLI200544N ZT			444	648		56	10	18	6	76	40.6
VLI200544N			444	648		56	10	18	6	76	38
	232.20.0500.013		445.2	648		56	10	18	6	76	36.9
	232.20.0500.503		445.2	648		56	20	18	6	76	36.700000000000003
	232.21.0575.013		445.2	647		56	10	18	6	76	36.9
		I.650.20.00.C	445.2	648		56	10	18	6	76	40.200000000000003
VLI200644N ZT			546	748		56	12	18	6	93	47.4
VLI200644N			546	748		56	12	18	6	93	45
	232.20.0600.013		547.2	748		56	12	18	6	93	43.7
	232.21.0675.013		547.2	747		56	24	18	6	93	43.4
	232.21.0675.013		547.2	747		56	12	18	6	93	43.7
		I.750.20.00.C	547.2	748		56	12	18	6	93	53.3
VLI200744N ZT			648	848		56	12	18	6	110	54
VLI200744N			648	848		56	12	18	6	110	51.5
	232.20.0700.013		649.2	848		56	12	18	6	110	51.1
	232.20.0700.503		649.2	848		56	24	18	6	110	50.8
	232.21.0775.013		649.2	847		56	12	18	6	110	51.1
		I.850.20.00.C	649.2	848		56	12	18	6	110	63.1
VLI200844N ZT			736	948		56	14	18	8	94	65.2
VL1200844N			736	948		56	14	18	8	94	61.5
	232.20.0800.013		737.6	948		56	14	18	8	94	61.6
	232.20.0800.503		737.6	948		56	28	18	8	94	61.3
	232.21.0875.013		737.6	947		56	14	18	8	94	61.6
		I.950.20.00.C	737.6	948		56	14	18	8	94	76.599999999999994
VLI300955N			810	1100		90	30	22	10	83	164
	282.30.0900.013		812	1100		90	30	22	10	83	159
	282.30.0975.013		812	1098		90	30	22	10	83	159
		I.1100.32.00.C	812	1100		90	30	12	10	83	159
VLI200944N ZT			840	1048		56	16	18	8	107	71
VLI200944N			840	1048		56	16	18	8	107	67.5
	232.20.0900.013		841.6	1048		56	16	18	8	107	65.8
	232.20.0900.503		841.6	1048		56	32	18	8	107	65.400000000000006
	232.21.0975.013		841.6	1047		56	16	18	8	107	65.8
		I.1050.20.00.C	841.6	1048		56	16	18	8	107	79.8
VLI301055N			910	1200		90	30	22	10	93	181
	282.30.1000.013		912	1200		90	30	22	10	93	176
	282.30.1075.013		912	1198		90	30	22	10	93	176
		I.1200.32.00.C	912	1200		90	30	12	10	93	176
VLI201094 N ZT			984	1198		56	16	,18	8	125	80
VLI201094N			984	1198		56	16	18	8	125	81.5
	232.20.1000.013		985.6	1198		56	16	18	8	125	80.7
	232.20.1000.503		985.6	1198		56	32	18	8	125	80.3
	232.21.1075.013		985.6	1197		56	16	18	8	125	80.7
		I.1200.20.00.C	985.6	1198		56	16	18	8	125	101
VLI301155N			1010	1300		90	36	22	10	103	198
	282.30.1100.013		1012	1300		90	36	22	10	103	192
	282.30.1175.013		1012	1298		90	36	22	10	103	192
		I.1300.32.00.C	1012	1300		90	36	12	10	103	192
VLI301255N			1110	1400		90	42	22	10	113	215
	282.30.1200.013		1112	1400		90	42	22	10	113	208
	282.30.1275.013		1112	1398		90	42	22	10	113	208
		I.1400.32.00.C	1112	1400		90	42	12	10	113	208
VLI301355N			1210	1500		90	42	22	10	123	233
	282.30.1300.013		1212	1500		90	42	22	10	123	226
	282.30.1375.013		1212	1498		90	42	22	10	123	226
		I.1500.32.00.C	1212	1500		90	42	12	10	123	226
	282.30.1400.013		1310	1600		90	48	22	10	133	243
	282.30.1475.013		1310	1598		90	48	22	10	133	243
		I.I600.32.00.C	1310	1600		90	48	12	10	133	243
VLI301455N			1310	1600		90	48	22	10	133	251

The post Single row four point contact ball internal gear flange type slewing bearing appeared first on ZZ Slewing Bearing.

single-row ball type gearless flange slewing bearing

andy — Thu, 15 May 2025 08:30:05 +0000

The single-row ball type gearless flange slewing bearing is a highly versatile and durable product designed to meet the demands of various industries, from construction and heavy machinery to marine applications. This type of slewing bearing features a robust, flange-mounted design that enhances its overall stability and ease of installation. It is ideal for applications where space constraints exist and a reliable, cost-effective solution is required without the complexity of gear mechanisms.

A single-row ball slewing bearing consists of an outer ring, an inner ring, and a ball raceway. The single-row ball configuration ensures optimal load distribution, enhancing the bearing’s efficiency and performance. The absence of gears in this design simplifies the structure, making it less prone to failure and maintenance, resulting in reduced operational downtime.

One of the key benefits of this type of slewing bearing is its flange mounting system. The flange structure not only simplifies the assembly process but also provides an additional layer of strength and support, making it suitable for applications where high axial and radial loads are common. Whether used in cranes, excavators, or other rotating machinery, the single-row ball type gearless flange slewing bearing provides smooth, reliable rotation even under heavy stress.

INA	Rothe Erde	TG	D	d	H	D1	n1	Φ1	d2	H1	d1	Weigt kg
	230.20.0400.013		518	304	56	490	8	18		45.5	415.5	23.4
	230.20.0400.503		518	304	56	490	16	18		45.5	415.5	23
		SD.505.20.00.C	518	304	56	490	8	18	375	46	415.5	24.3
VLU200414ZT			518	304	56	490	8	18	369.5	47.5	415.5	26.5
VLU200414			518	304	56	490	8	18		47.5	415.5	23.5
	230.21.0475.013		517	305	56	490	8	18		45.5	415.5	23.4
	230.20.0500.013		648	434	56	620	10	18		45.5	545.5	31
	230.20.0500.503		648	434	56	620	20	18		45.5	545.5	30.4
		SD.650.20.00.C	648	434	56	620	10	18	505	46	545.5	32
	230.20.0500.013		648	434	56	620	20	18	505	45.5	545.5	30.4
VLU200544ZT			648	434	56	620	10	18	499.5	47.5	545.5	35.4
VLU200544			648	434	56	620	10	18		47.5	545.5	31
		SD.650.20.00.C	648	434	56	620	10	18	505	46	545.5	31
	230.21.0575.013		647	435	56	620	10	18		45.5	545.5	31
	230.20.0600.013		748	534	56	720	12	18		45.5	645.5	36.4
	230.20.0600.503		748	534	56	720	24	18		45.5	645.5	35.799999999999997
		SD.750.20.00.C	748	534	56	720	12	18	605	46	645.5	38
VLU200644ZT			748	534	56	720	12	18	602	47.5	645.5	38
VLU200644ZT			748	534	56	720	12	18	599.5	47.5	645.5	42
VLU200644			748	534	56	720	12	18		47.5	645.5	36.5
		SD.750.20.00.C	748	534	56	720	12	18	605	46	645.5	36.5
	230.21.0675.013		747	535	56	720	12	18		45.5	645.5	36.4
		SD.750.20.00.C	746	536	56	720	12	18	605	46	645.5	38
	230.20.0700.013		848	634	56	820	12	18		45.5	745.5	42.8
	230.20.0700.503		848	634	56	820	24	18		45.5	745.5	42.2
VLU200744ZT			848	634	56	820	12	18	699.5	47.5	745.5	45
VLU200744			848	634	56	820	12	18		47.5	745.5	42.5
	230.21.0775.013		847	635	56	820	12	18		45.5	745.5	42.8
	230.20.0800.013		948	734	56	920	14	18		45.5	845.5	47.8
	230.20.0800.503		948	734	56	920	28	18		45.5	845.5	47.1
		SD.950.20.00.C	948	734	56	920	14	18	805	46	845.5	50
VLU200844ZT			948	734	56	920	14	18	799.5	47.5	845.5	53.8
VLU200844			948	734	56	920	14	18		47.5	845.5	48
	230.21.0875.013		947	735	56	920	14	18		45.5	845.5	47.8
		SD.950.20.00.C	946	736	56	920	14	18	805	46	845.5	50
	280.30.0900.013		1100	805	90	1060	30	22		71	953.5	131
	280.30.0900.013		1100	805	90	1060	30	22		71	953.5	131
VLU 300955			1100	805	90	1060	30	22		71	953	135
		SD.1100.32.00.C	1100	805	90	1060	30	22	893	71	955	131
	280.30.0975.013		1098	807	90	1060	30	22		71	953.5	131
	230.20.0900.013		1048	834	56	1020	16	18		45.5	945.5	53.1
	230.20.0900.503		1048	834	56	1020	32	18		45.5	945.5	52.3
		SD.1050.20.00.C	1048	834	56	1020	16	18	905	46	945.5	55.6
VLU200944ZT			1048	834	56	1020	16	18	899.5	47.5	945.5	61
VLU200944			1048	834	56	1020	16	18		47.5	945.5	54
	230.21.0975.013		1047	835	56	1020	16	18		45.5	945.5	53.1
	280.30.1000.013		1200	905	90	1160	30	22		71	1053.5	145
VLU301055			1200	905	90	1160	30	22		71	1053	149
		SD.1200.32.00.C	1200	905	90	1160	30	22	993	71	1055	145
	280.30.1075.013		1198	907	90	1160	30	22		71	1053.5	145
	230.20.1000.013		1198	984	56	1170	16	18		45.5	1095.5	61.9
	230.20.1000.503		1198	984	56	1170	32	18		45.5	1095.5	61.1
		SD.1200.20.00.C	1198	984	56	1170	16	18	1055	46	1095.5	62.8
VLU 201094			1198	984	56	1170	16	18		47.5	1095.5	62.5
		SD.1200.20.00.C	1198	984	56	1170	16	18	1055	46	1095.5	62
	230.21.1075.013		1197	985	56	1170	16	18		45.5	1095.5	61.9
	280.30.1100.013		1300	1005	90	1260	36	22		71	1153.5	159
VLU 301155			1300	1005	90	1260	36	22		71	1153	164
		SD.1300.32.00.C	1300	1005	90	1260	36	22	1093	71	1155	159
	280.30.1175.013		1298	1007	90	1260	36	22		71	1153.5	159
	280.30.1200.013		1400	1105	90	1360	42	22		71	1253.5	172
VLU 301255			1400	1105	90	1360	42	22		71	1253	177
		SD.1400.32.00.C	1400	1105	90	1360	42	22	1193	71	1255	172
	280.30.1275.013		1398	1107	90	1360	42	22		71	1253.5	172
	280.30.1300.013		1500	1205	90	1460	42	22		71	1353.5	186
VLU 301355			1500	1205	90	1460	42	22		71	1353	191
		SD.1500.32.00.C	1500	1205	90	1460	42	22	1293	71	1355	186
	280.30.1375.013		1498	1207	90	1460	42	22		71	1353.5	186
	280.30.1400.013		1600	1305	90	1560	48	22		71	1453.5	200
	280.30.1400.013		1600	1305	90	1560	48	22	1393	71	1456.5	200
VLU 301455			1600	1305	90	1560	48	22		71	1453	206
		SD.1600.32.00.C	1600	1305	90	1560	48	22	1393	71	1455	200
	280.30.1475.013		1598	1307	90	1560	48	22		71	1453.5	200

The post single-row ball type gearless flange slewing bearing appeared first on ZZ Slewing Bearing.

Slewing Bearing Design Optimization

andy — Tue, 19 Nov 2024 05:51:58 +0000

Slewing bearing design optimization involves refining various elements of the bearing’s design to improve performance, reduce costs, and extend service life. Here are key factors to consider in the optimization process:

Material Selection: Choosing high-quality materials is crucial for enhancing the bearing’s durability and reducing wear. Steel alloys, ceramics, and composite materials can be optimized based on the specific operating conditions (e.g., load, temperature, environment).
Load Distribution: Optimizing the design to ensure uniform load distribution helps reduce stress concentrations and improve the bearing’s efficiency. This can be achieved by adjusting the geometry of the raceways or using finite element analysis (FEA) to simulate real-world loading conditions.
Seal Design: The seals play a crucial role in protecting the bearing from contaminants. Optimizing the design of seals for minimal friction, maximum protection, and ease of replacement can improve overall reliability and reduce maintenance.
Fatigue Life: By optimizing the bearing design to minimize fatigue during cyclic loading, manufacturers can improve service life. This involves adjusting the contact angle, material hardness, and raceway geometry.
Thermal Management: Consideration of the thermal expansion and heat dissipation properties of the bearing materials can help optimize performance, particularly in high-temperature environments or when the bearing is subjected to varying loads over time.

NO.	De	D	d	H	b	m	z	x	k	Q&T	KG
011.20.400	499		325	55	46	5	97	+0.5	0.1	44	37
011.20.450	554		369	55	46	5	108	+0.5	0.1	44	41
011.30.500	629	602	398	80	60	5	123	+0.5	0.1	52	89
012.30.500	628.8	602	398	80	60	6	102	+0.5	0.1	62	89
011.20.560	670.8		479	55	46	6	109	+0.5	0.1	53	56
011.30.560	689	662	458	80	60	5	135	+0.5	0.1	52	100
012.30.560	688.8	662	458	80	60	6	112	+0.5	0.1	62	100
011.20.630	742.8		543	55	46	6	121	+0.5	0.1	53	64
011.30.630	772.8	732	528	80	60	6	126	+0.5	0.1	62	118
012.30.630	774.4	732	528	80	60	8	94	+0.5	0.1	83	118
011.20.710	820.8		623	55	46	6	134	+0.5	0.1	53	70
011.30.710	850.8	812	608	80	60	6	139	+0.5	0.1	62	131
012.30.710	854.4	812	608	80	60	8	104	+0.5	0.1	83	131
011.25.764	886.8		671	63	54	6	145	+0.5	0.1	63	100
011.20.800	930	894	704	70	50	6	154	-0.5	0		120
012.20.800	936	894	704	70	50	8	116	-0.5	0		120
011.25.800	942	904	692	78	58	6	156	-0.5	0		150
012.25.800	952	904	692	78	58	8	118	-0.5	0		154
011.40.800	966.4	922	678	100	80	8	118	+0.5	0.1	111	219
012.40.800	968	922	678	100	80	10	94	+0.5	0.1	140	219
011.25.900	1048	1004	792	78	58	8	130	-0.5	0		170
012.25.900	1060	1004	792	78	58	10	105	-0.5	0		176
011.40.900	1062.4	1022	778	100	80	8	130	+0.5	0.1	111	244
012.40.900	1068	1022	778	100	80	10	104	+0.5	0.1	140	244
011.25.980	1110.4		887	63	54	8	136	+0.5	0.1	83	130
011.25.1000	1152	1104	892	78	58	8	143	-0.5	0		191
012.25.1000	1160	1104	892	78	58	10	115	-0.5	0		194
011.35.1000	1160	1120	876	90	70	8	144	-0.5	0		238
012.35.1000	1170	1120	876	90	70	10	116	-0.5	0		244
011.40.1000	1188	1122	878	100	80	10	116	+0.5	0.1	140	294
012.40.1000	1185.6	1122	878	100	80	12	96	+0.5	0.1	167	284
011.25.1120	1278		1013	79	70	10	125	+0.5	0.1	135	191
011.35.1120	1300	1240	996	90	70	10	129	-0.5	0		286
012.35.1120	1308	1240	996	90	70	12	108	-0.5	0		289
011.40.1120	1298	1242	998	100	80	10	127	+0.5	0.1	140	318
012.40.1120	1305.6	1242	998	100	80	12	106	+0.5	0.1	167	318
011.30.1180	1338		1068	79	70	10	131	+0.5	0.1	129	238
011.25.1250	1408		1143	79	70	10	138	+0.5	0.1	135	232
011.35.1250	1430	1370	1126	90	70	10	142	-0.5	0		317
012.35.1250	1440	1370	1126	90	70	12	119	-0.5	0		324
011.40.1250	1450	1390	1108	102	80	10	144	-0.5	0		416
012.40.1250	1452	1390	1108	102	80	12	120	-0.5	0		412
011.45.1250	1449.6	1390	1110	110	90	12	118	+0.5	0.1	188	438
012.45.1250	1453.2	1390	1110	110	90	14	101	+0.5	0.1	219	438
011.30.1320	1497.6		1208	89	80	12	122	+0.5	0.1	176	313
011.35.1400	1584	1520	1276	90	70	12	131	-0.5	0		354
012.35.1400	1596	1520	1276	90	70	14	113	-0.5	0		364
011.40.1400	1608	1540	1258	102	80	12	133	-0.5	0		470
012.40.1400	1610	1540	1258	102	80	14	114	-0.5	0		465
011.40.1400	1593.6		1266	94	85	12	130	+0.5	0.1	187	424
011.45.1400	1605.6	1540	1260	110	90	12	131	+0.5	0.1	188	501
012.45.1400	1607.2	1540	1260	110	90	14	112	+0.5	0.1	219	501
011.30.1500	1677.6		1388	89	80	12	137	+0.5	0.1	176	355
011.40.1600	1803.2		1466	94	85	14	126	+0.5	0.1	218	503
011.40.1600	1812	1740	1458	102	80	12	150	-0.5	0		554
012.40.1600	1820	1740	1458	102	80	14	129	-0.5	0		561
011.45.1600	1817.2	1740	1460	110	90	14	127	+0.5	0.1	219	584
012.45.1600	1820.8	1740	1460	110	90	16	111	+0.5	0.1	250	584
011.50.1600	1824	1762	1434	124	100	12	151	-0.5	0		750
012.50.1600	1834	1762	1434	124	100	14	130	-0.5	0		763
011.40.1800	1999.2		1666	94	85	14	140	+0.5	0.1	218	558
011.40.1800	2016	1940	1658	102	80	14	143	-0.5	0		612
012.40.1800	2032	1940	1658	102	80	16	126	-0.5	0		637
011.45.1800	2013.2	1940	1660	110	90	14	141	+0.5	0.1	219	652
012.45.1800	2012.8	1940	1660	110	90	16	123	+0.5	0.1	250	639
011.50.1800	2044	1964	1634	124	100	14	145	-0.5	0		887
012.50.1800	2048	1964	1634	124	100	16	127	-0.5	0		885
011.50.1900	2139.2	2139.2	1729	109	100	14	150	+0.5	0.1	257	861
011.60.2000	2268.8	2178	1825	144	120	16	139	+0.5	0.1	333	1202
012.60.2000	2264.4	2178	1825	144	120	18	123	+0.5	0.1	375	1169
011.50.2130	2380.8	2380.8	1959	109	100	16	146	+0.5	0.1	294	978
011.60.2240	2492.8	2418	2065	144	120	16	153	+0.5	0.1	333	1294
012.60.2240	2498.4	2418	2065	144	120	18	136	+0.5	0.1	375	1294
011.50.2355	2604.8	2604.8	2184	109	100	16	160	+0.5	0.1	294	1075
011.60.2500	2768.4	2678	2325	144	120	18	151	+0.5	0.1	375	1509
012.60.2500	2776	2678	2325	144		20	136	+0.5	0.1	418	1509
011.50.2645	2892.8	2892.8	2474	109	100	16	178	+0.5	0.1	294	1199
011.60.2800	3074.4	2978	2625	144	120	18	168	+0.5	0.1	375	1696
012.60.2800	3076	2978	2625	144	120	20	151	+0.5	0.1	418	1696
011.75.3150	3476	3376	2922	174	150	20	171	+0.5	0.1	522	2873
012.75.3150	3471.6	3376	2922	174	150	22	155	+0.5	0.1	574	2873

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slewing ring bearing

andy — Fri, 19 Jul 2024 01:01:31 +0000

A slewing ring bearing is a large bearing specifically designed to withstand axial, radial, and overturning moments, widely used in heavy machinery and industrial equipment. Its main components include inner and outer rings, rolling elements (such as balls or rollers), cages, and seals. Depending on the structure and application, slewing ring bearings are classified into single-row four-point contact ball bearings, double-row ball bearings, cross roller bearings, and three-row roller bearings. Different types of bearings are suitable for various loads and application scenarios.

Slewing ring bearings are extensively used in construction machinery (e.g., excavators, cranes, tower cranes), wind power equipment (e.g., wind turbine rotors and yaw systems), medical equipment (e.g., CT scanners and radiotherapy equipment), and industrial machinery (e.g., rotary tables and robotic joints). Their features include high load capacity, smooth rotation, durability, and easy installation. High-quality slewing ring bearings are made from high-strength materials and precise manufacturing processes, ensuring long-term stable operation under heavy load conditions.

The key to maintaining slewing ring bearings lies in regular lubrication, seal inspection, and load monitoring. Regular lubrication ensures the smooth operation of rolling elements and raceways, extending bearing life; seal inspection prevents contaminants from entering the bearing; load monitoring avoids overloading, ensuring the bearing operates within its design load range. Proper selection and maintenance of slewing ring bearings can significantly enhance equipment performance and longevity.

No. D_Lmm	Ring Dimension				Gear Parameter					Gear Torque		N.W kg
	De mm	D mm	d mm	H mm	b mm	m mm	z	x	k	Normalizing kN	Q&T kN
021.25.500	644	616	384	106	60	5	126	+0.5	0.1	37	52	130
022.25.500	646. 8	616	384	106	60	6	105	+0.5	0.1	45	62	130
021.25.560	704	676	444	106	60	5	138	+0.5	0.1	37	52	146
022.25.560	706. 8	676	444	106	60	6	115	+0.5	0.1	45	62	147
021.25.630	790. 8	746	514	106	60	6	129	+0.5	0.1	45	62	173
022.25.630	790. 4	746	514	106	60	8	96	+0.5	0.1	60	83	170
021.25.710	862. 8	826	594	106	60	6	141	+0.5	0.1	45	62	190
022.25.710	862. 4	826	594	106	60	8	105	+0.5	0.1	60	83	187
021.30.800	982. 4	942	658	124	80	8	120	+0.5	0.1	80	111	305
022.30.800	988	942	658	124	80	10	96	+0.5	0.1	100	140	307
021.30.900	1086.4	1042	758	124	80	8	133	+0.5	0.1	80	111	349
022.30.900	1088	1042	758	124	80	10	106	+0.5	0.1	100	140	348
021.30.1000	1198	1142	858	124	80	10	117	+0.5	0.1	100	140	396
022.30.1000	1197.6	1142	858	124	80	12	97	+0.5	0.1	120	167	391
021.30.1120	1318	1262	978	124	80	10	129	+0.5	0.1	100	140	445
022.30.1120	1317.6	1262	978	124	80	12	107	+0.5	0.1	120	167	439
021.40.1250	1497.6	1426	1074	160	90	12	122	+0.5	0.1	135	188	784
022.40.1250	1495.2	1426	1074	160	90	14	104	+0.5	0.1	158	219	774
021.40.1400	1641.6	1576	1224	160	90	12	134	+0.5	0.1	135	188	870
022.40.1400	1649.2	1576	1224	160	90	14	115	+0.5	0.1	158	219	878
021.40.1600	1845.2	1776	1424	160	90	14	129	+0.5	0.1	158	219	995
022.40.1600	1852.8	1776	1424	160	90	16	113	+0.5	0.1	181	250	1003
021.40.1800	2055.2	1976	1624	160	90	14	144	+0.5	0.1	158	219	1147
022.40.1800	2060.8	1976	1624	160	90	16	126	+0.5	0.1	181	250	1151
021.50.2000	2300.8	2215	1785	190	120	16	141	+0.5	0.1	241	333	1794
022.50.2000	2300.4	2215	1785	190	120	18	125	+0.5	0.1	271	375	1780
021.50.2240	2540.8	2455	2025	190	120	16	156	+0.5	0.1	241	333	2017
022.50.2240	2552.4	2455	2025	190	120	18	139	+0.5	0.1	271	375	2048
021.50.2500	2804.4	2715	2285	190	120	18	153	+0.5	0.1	271	375	2246
022.50.2500	2816	2715	2285	190	120	20	138	+0.5	0.1	301	418	2280
021.50.2800	3110.4	3015	2585	190	120	18	170	+0.5	0.1	271	375	2553
022.50.2800	3116	3015	2585	190	120	20	153	+0.5	0.1	301	418	2563
021.60.3150	3536	3428	2872	226	150	20	174	+0.5	0.1	377	522	4428
022.60.3150	3537.6	3429	2873	227	151	22	158	+0.5	0.1	415	574	4414
021.60.3550	3936	3828	3272	226	150	20	194	+0.5	0.1	377	522	5012
022.60.3550	3933.6	3828	3272	226	150	22	176	+0.5	0.1	415	574	4967
021.60.4000	4395.6	4278	3722	226	150	22	197	+0.5	0.1	415	574	5706
022.60.4000	4395	4278	3722	226	150	25	173	+0.5	0.1	471	652	5656
021.60.4500	4879.6	4778	4222	226	150	22	219	+0.5	0.1	415	574	6293
022.60.4500	4895	4778	4222	226	150	25	193	+0.5	0.1	471	652	6385

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Turntable Bearing

andy — Thu, 18 Jul 2024 02:24:49 +0000

A turntable bearing, also known as a slewing bearing or slewing ring, is a rotational rolling-element bearing that typically supports heavy but slow-turning or slow-oscillating loads, often a horizontal platform such as a conventional crane, a swing yarder, or the wind-facing platform of a horizontal-axis windmill. Here are some key aspects of turntable bearings:

Structure

Inner Ring and Outer Ring: These bearings consist of an inner ring and an outer ring, with a rolling element such as balls or rollers in between. The rings may have gear teeth integral with them to allow for rotational movement.
Rolling Elements: Balls or cylindrical rollers that provide smooth rotation and can handle axial, radial, and moment loads.
Seals: To protect the bearing from contamination and retain lubrication.

Types

Single-row ball bearings: Commonly used in light to medium load applications.
Double-row ball bearings: Used for higher load capacities.
Cross-roller bearings: Known for high precision and load capacities.
Three-row roller bearings: Suitable for very high loads, such as in heavy machinery and large cranes.

Applications

Cranes and Lifts: For rotation and load-bearing capabilities.
Excavators: Allowing for smooth and stable rotation of the upper structure.
Wind Turbines: Facilitating the yaw movement to align the turbine with the wind direction.
Rotary Tables: Used in manufacturing and machining for precision rotation.

Maintenance

Regular maintenance is essential for ensuring the longevity and performance of turntable bearings, including:

Lubrication: Keeping the bearing well-lubricated to reduce friction and wear.
Inspection: Regularly checking for signs of wear, damage, or misalignment.
Cleaning: Ensuring that the bearing is free from contaminants.

Turntable bearings are crucial in various industries for their ability to support heavy loads while providing smooth rotational movement.

NO.	De	D	d	H	b	m	z	x	k	Normalizing	Q&T	KG
131.25.500	664	634	366	148	80	5	130	0.5	0.1	50	67	211
132.25.500	664.8	634	366	148	80	6	108	0.5	0.1	60	80	210
131.25.560	724	694	426	148	80	5	142	0.5	0.1	50	67	236
132.25.560	724.8	694	426	148	80	6	118	0.5	0.1	60	80	235
131.25.630	808.8	764	496	148	80	6	132	0.5	0.1	60	80	275
132.25.630	806.4	764	496	148	80	8	98	0.5	0.1	80	110	270
131.25.710	886.8	844	576	148	80	6	145	0.5	0.1	60	80	310
132.25.710	886.4	844	576	148	80	8	108	0.5	0.1	80	110	306
131.32.800	1006.4	964	636	182	120	8	123	0.5	0.1	121	167	515
132.32.800	1008	964	636	182	120	10	98	0.5	0.1	151	209	512
131.32.900	1102.4	1064	736	182	120	8	135	0.5	0.1	121	167	577
132.32.900	1108	1064	736	182	120	10	108	0.5	0.1	151	209	591
131.32.1000	1218	1164	836	182	120	10	119	0.5	0.1	151	209	662
132.32.1000	1221.5	1164	836	182	120	12	99	0.5	0.1	181	251	662
131.32.1120	1338	1284	956	182	120	10	131	0.5	0.1	151	209	746
132.32.1120	1341.6	1284	956	182	120	12	109	0.5	0.1	181	251	746
131.40.1250	1509.6	1445	1055	220	150	12	123	0.5	0.1	229	314	1194
132.40.1250	1509.2	1445	1055	220	150	14	105	0.5	0.1	263	366	1183
131.40.1400	1665.6	1595	1205	220	150	12	136	0.5	0.1	229	314	1364
132.40.1400	1663.2	1595	1205	220	150	14	116	0.5	0.1	263	366	1345
131.40.1600	1873.2	1795	1405	220	150	14	131	0.5	0.1	263	366	1577
132.40.1600	1868.8	1795	1405	220	150	16	114	0.5	0.1	302	417	1545
131.40.1800	2069.1	1995	1605	220	150	14	145	0.5	0.1	263	366	1766
132.40.1800	2076.8	1995	1605	220	150	16	127	0.5	0.1	302	417	1782
131.20.2000	2236.8		1853	132	106	16	137	0.5	0.1		311	958
131.25.2000	2268.8		1819	147	117	16	139	0.5	0.1		326	1277
131.45.2000	2300.8	2221	1779	231	160	16	141	0.5	0.1	322	445	2254
132.45.2000	2300.4	2221	1779	231	160	18	125	0.5	0.1	362	501	2235
131.25.2240	2516.4		2059	147	117	18	137	0.5	0.1		366	1447
131.32.2240	2552.4		2022	181	139	18	139	0.5	0.1		435	2074
131.45.2240	2556.8	2461	2019	231	160	16	157	0.5	0.1	322	445	2626
132.45.2240	2552.4	2461	2019	231	160	18	139	0.5	0.1	362	501	2584
131.25.2500	2786.4		2319	147	117	18	152	0.5	0.1		366	1645
131.32.2500	2822.4		2282	181	139	18	154	0.5	0.1		435	2373
131.45.2500	2822.4	2721	2279	231	160	18	154	0.5	0.1	362	501	2925
132.45.2500	2816	2721	2279	231		20	138	0.5	0.1	402	556	2867
131.25.2800	3096		2619	147	117	20	152	0.5	0.1	203	407	1874
131.32.2800	3136		2582	181	139	20	154	0.5	0.1		483	2705
131.40.2800	3136		2562	220	170	20	154	0.5	0.1		591	3430
131.45.2800	3110.4	3021	2579	231	160	18	170	0.5	0.1	362	501	3221
132.45.2800	3116	3021	2579	231	160	20	153	0.5	0.1	402	556	3233
131.32.3150	3476		2932	181	139	20	171	0.5	0.1		483	2969
131.40.3150	3515.6		2912	220	170	22	157	0.5	0.1		650	4003
131.50.3150	3536	3432	2868	270	180	20	174	0.5	0.1	452	626	5276
132.50.3150	3537.6	3432	2868	270	180	22	158	0.5	0.1	498	689	5260
131.32.3550	3889.6		3332	181	139	22	174	0.5	0.1		532	3411
131.40.3550	3911.6		3312	220	170	22	175	0.5	0.1		650	4468
131.50.3550	3936	3832	3268	270	180	20	194	0.5	0.1	452	626	5998
132.50.3550	3933.6	3832	3268	270	180	22	176	0.5	0.1	498	689	5944
131.32.4000	4351.6		3782	181	139	22	195	0.5	0.1		531	3940
131.40.4000	4363.2		3762	220	170	24	179	0.5	0.1		710	5045
131.50.4000	4395.6	4282	3718	270	180	22	197	0.5	0.1	498	689	6833
132.50.4000	4395	4282	3718	270	180	25	173	0.5	0.1	565	783	6772
131.40.4500	4867.2		4262	220	170	24	200	0.5	0.1		710	5681
131.50.4500	4901.6	4782	4218	270	180	22	220	0.5	0.1	498	689	7809
132.50.4500	4895	4782	4218	270	180	25	193	0.5	0.1	565	783	7674

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slewing bearing for Tadano crane

andy — Mon, 03 Jun 2024 07:43:15 +0000

A slewing bearing, also known as a turntable bearing or slewing ring, is a critical component in the Tadano crane’s mechanism. It enables the crane to rotate smoothly and accurately, ensuring the precise movement of the load. Here’s a detailed overview of its components, functions, and maintenance:

	OD	ID	Inside Bolt Holes No.	Outside Bolt Holes No.	Teeth No.	Material	Hardness	Replacement
Tadano z300	456	240	19*21mm	10*M18	74	50Mn、42CrMo、40Cr	Above 210HB	TZ300、330、340、360
Tadano z500	557	335	25*22mm	10*m16	91	50Mn、42CrMo、40Cr	Above 210HB	TZ500
unic	455	238	19*21mm	11*M16	74	50Mn、42CrMo、40Cr	Above 210HB	Unic 330、340、360、370

For more models, please contact our engineers.

Components of a Slewing Bearing

Inner and Outer Rings: These rings house the rolling elements and are connected to the crane’s rotating and stationary parts.
Rolling Elements: Typically balls or rollers that facilitate smooth rotation by reducing friction.
Cages: These structures keep the rolling elements evenly spaced.
Seals: Seals protect the bearing from contaminants such as dirt and moisture.

Functions of a Slewing Bearing

Rotation: Enables the crane to rotate its boom and load around a vertical axis.
Load Support: Handles axial, radial, and moment loads, ensuring stability during operation.
Precision Movement: Allows for precise positioning and movement of the crane’s load.

Types of Loads on Slewing Bearings

Axial Load: Force parallel to the axis of rotation.
Radial Load: Force perpendicular to the axis of rotation.
Moment Load: Torque or rotational force that tends to twist the bearing.

Maintenance and Care

Proper maintenance of the slewing bearing is crucial for the crane’s performance and longevity. Here are some maintenance tips:
Regular Inspections: Periodic checks for wear, corrosion, and lubrication levels.
Lubrication: Use appropriate lubricants and ensure regular lubrication to minimize friction and wear.
Seal Integrity: Inspect and replace seals to prevent contamination.
Bolt Tightening: Check and tighten bolts according to the manufacturer’s specifications to maintain proper clamping force.
Cleaning: Keep the bearing clean from debris and other contaminants.

Signs of Wear or Damage

Unusual Noise: Grinding or clicking sounds during rotation.
Increased Vibration: Excessive vibration may indicate misalignment or wear.
Difficulty in Movement: Stiff or uneven rotation.
Visible Damage: Cracks, chips, or deformation on the bearing surfaces.

Replacement and Repairs

If the slewing bearing shows significant wear or damage, it may need to be repaired or replaced. Here are the general steps for replacement:

Safely Support the Crane: Ensure the crane is securely supported and immobilized.
Remove the Old Bearing: Disconnect and remove the existing bearing carefully.
Prepare the Mounting Surface: Clean and inspect the mounting surfaces for any damage or irregularities.
Install the New Bearing: Align and install the new bearing, ensuring proper lubrication.
Test the Crane: After installation, test the crane’s rotation and load-handling capabilities.

Conclusion

The slewing bearing is a vital component for the operational efficiency of Tadano cranes. Regular maintenance, prompt repairs, and careful handling can extend its life and ensure the safety and reliability of the crane.

The post slewing bearing for Tadano crane appeared first on ZZ Slewing Bearing.