slewing ring bearing with internal 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 internal gear

A slewing ring bearing with internal gear is a type of bearing designed to support high radial, axial loads, and tilting moments, with the gear integrated into the inner ring. This type of bearing is commonly used in construction machinery, rotating platforms, wind turbines, and other equipment that requires precise rotation and high load capacity.

Features of Slewing Ring Bearing with Internal Gear:

Integrated Gear Design:

The internal gear is formed as part of the inner ring, reducing the number of components, simplifying the structure, and lowering assembly complexity.
The gear meshes directly with the drive mechanism, reducing the need for external gears and enhancing overall compactness.

High Load Capacity:

Internal gear slewing bearings can simultaneously bear high radial loads, axial loads, and tilting moments, making them suitable for heavy machinery and large equipment.
By optimizing gear design and material selection, reliable operation is ensured under heavy loads and high-stress conditions.

Precise Rotation:

The internal gear design allows for more precise rotational control, suitable for applications requiring high positioning accuracy.
Since the gear is located on the inner ring, it is less exposed to the external environment, reducing wear and maintenance requirements.

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
111.25.500	629	602	398	75	60	5	123	+0.5	0.1	37	52	84
112.25.500	628.8	602	398	75	60	6	102	+0.5	0.1	45	62	84
111.25.560	689	662	458	75	60	5	135	+0.5	0.1	37	52	92
112.25.560	688.8	662	458	75	60	6	112	+0.5	0.1	45	62	92
111.25.630	772.8	732	528	75	60	6	126	+0.5	0.1	45	62	111
112.25.630	774.4	732	528	75	60	8	94	+0.5	0.1	60	83	111
111.25.710	850.8	812	608	75	60	6	139	+0.5	0.1	45	62	125
112.25.710	854.4	812	608	75	60	8	104	+0.5	0.1	60	83	125
111.28.800	966.4	922	678	82	65	8	118	+0.5	0.1	65	91	179
112.28.800	968	922	678	82	65	10	94	+0.5	0.1	81	114	179
111.28.900	1062.4	1022	778	82	65	8	130	+0.5	0.1	65	91	200
112.28.900	1068	1022	778	82	65	10	104	+0.5	0.1	81	114	200
111.28.1000	1188	1122	878	82	65	10	116	+0.5	0.1	81	114	242
112.28.1000	1185.6	1122	878	82	65	12	96	+0.5	0.1	97	136	242
111.28.1120	1298	1242	998	82	65	10	127	+0.5	0.1	81	114	261
112.28.1120	1305.6	1242	998	82	65	12	106	+0.5	0.1	97	136	261
111.32.1250	1449.6	1390	1110	91	75	12	118	+0.5	0.1	113	157	362
112.32.1250	1453.2	1390	1110	91	75	14	101	+0.5	0.1	132	182	362
111.32.1400	1605.6	1540	1260	91	75	12	131	+0.5	0.1	113	157	417
112.32.1400	1607.2	1540	1260	91	75	14	112	+0.5	0.1	132	182	411
111.32.1600	1817.2	1740	1460	91	75	14	127	+0.5	0.1	132	182	488
112.32.1600	1820.8	1740	1460	91	75	16	111	+0.5	0.1	151	224	484
111.32.1800	2013.2	1940	1660	91	75	14	141	+0.5	0.1	132	182	530
112.32.1800	2012.8	1940	1660	91	75	16	123	+0.5	0.1	151	224	530
111.40.2000	2268.8	2178	1825	112	90	16	139	+0.5	0.1	181	250	935
112.40.2000	2264.4	2178	1825	112	90	18	123	+0.5	0.1	203	281	935
111.40.2240	2492.8	2418	2065	112	90	16	153	+0.5	0.1	181	250	1008
112.40.2240	2498.4	2418	2065	112	90	18	136	+0.5	0.1	203	281	1008
111.40.2500	2768.4	2678	2325	112	90	18	151	+0.5	0.1	203	281	1147
112.40.2500	2776	2678	2325	112	90	20	136	+0.5	0.1	226	313	1147
111.40.2800	3074.4	2978	2625	112	90	18	168	+0.5	0.1	203	281	1320
112.40.2800	3076	2978	2625	112	90	20	151	+0.5	0.1	226	313	1320
111.50.3150	3476	3376	2922	134	110	20	171	+0.5	0.1	276	383	2222
112.50.3150	3471.6	3376	2922	134	110	22	155	+0.5	0.1	304	421	2222

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: