Slewing ring bearing with external gear

Drive industry development

ZZ products are applied globally in solar tracking systems, wind power systems, satellite communications, and numerous other globally connected industries.

Slewing ring bearing with external gear

A slewing ring bearing with an external gear is a type of rotational bearing that can support heavy loads and allow smooth rotational movement. The external gear is integrated on the outer ring of the bearing, enabling it to be driven by a pinion or gear motor. This design is commonly used in applications such as cranes, excavators, wind turbines, and other machinery where large turning or swiveling movements are required. The external gear allows for easy integration into the drive system, making it suitable for various heavy-duty industrial applications.

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

Frequently Asked Questions

Expert Insights and Reliable Solutions to Your Most Common Questions.

1. What types of slewing bearings does ZZ Slewing Bearing provide?

ZZ Slewing Bearing supplies a full range of slewing bearings to meet different industrial needs:

Single row four point contact slewing bearings Application: medium loads, precise rotation.
Double row ball bearings Application: higher radial and axial loads.
Cross roller bearings –Application: high rigidity, suitable for robots and machining centers.
Three row roller bearings – Application: extreme loads in heavy equipment.
Ball combine roller bearings –Application: precise rotational adjustment applications.
Customized bearings – tailored for specific equipment requirements.

2. How do I choose the right bearing for my application?

Typical selection parameter for ZZ clients:

Load type: axial, radial, and tilting moment.

Rotation RPM: ensures long service life.

Installation space & mounting dimensions: inner/outer ring diameter, bolt circle.

Precision & rigidity requirements: critical for cranes, excavators, and robots.

ZZ engineers provide professional selection guidance according to your equipment and drawings.

3. What materials does ZZ Slewing Bearing use for slewing bearings?

ZZ Slewing Bearing selects materials for strength, wear resistance, and long-term durability:

Slewing ring: 42CrMo, 50Mn, C45N, 40CrNiMo, C48E.

Special forging spare parts: carburized/hardened steels for gear teeth (20CrMnTi, 18CrNiMo7‑6).

Corrosion resistant: SS 304, 316L, duplex stainless steel.

Surface treatments: heat treatment, quenching, carburizing, induction hardening, and surface coating(Four-Layer Packing, Strong Anti-Rust Oil, Black Oxide Treatment, Jet Black Paint Finish, Hot-Dip Galvanizing (CGL), Electro-Galvanizing (EGL), Hot-Dip Galvanizing + Paint Finish)

4. How can ZZ Slewing Bearing achieve maximum service life?

Correct installation with flat surfaces.

Proper lubrication using grease.

Avoid overloading or shock loads over capacity.

Monitor operating conditions regularly to prevent debris entry.

5. What causes abnormal noise or vibration in bearings?

Typical factors observed by ZZ engineers: