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Excavator slewing bearing

Excavator slewing bearings, also known as turntable bearings, are the rotating joints of excavators, connecting the upper and lower bodies of the excavator. They are typically equipped with internal and external gear rings that mesh with gears to achieve 360-degree rotation and bear radial loads, axial loads, and overturning moments generated during operation.

Item	Specification / Material
Outer Diameter Range	300 mm ～ 15,000 mm
Ring Material	42CrMo / 50Mn / C45
Ball / Roller Material	GCr15
Cage Material	20 Steel or ZL102 Cast Aluminum Alloy
Spacer Material	Nylon 6 / Nylon 66
Raceway Hardness	HRC 55 – 62
Gear Type	Gearless, Internal Gear, External Gear
Delivery Time	10 – 30 Days

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Excavator slewing bearing

What is a slew ring on an excavator?

The slewing bearing on an excavator is typically a turntable bearing; it is installed between the excavator's upper structure and its lower chassis. Its primary function is to facilitate the 360-degree rotation of the upper body, as well as to withstand the impact forces and overturning moments generated during operation. Typically, the excavator's slewing bearing features an inner or outer ring designed to mesh with a pinion gear, thereby enabling efficient power transmission.

LTZC Excavator Slew Ring Specifications

Bearing Model	Dimensions			Mounting Dimensions						Structural Dimension					Gear data					Weight
	Dmm	dmm	Hmm	D1mm	D2mm	n	omm	dmmm	Lmm	n1	D3mm	d1mm	H1mm	hmm	bmm	x	Mmm	Demm	z
113.25.500	602	398	75	566	434	20	18	M16	32	4	498	502	65	10	60	0.5	5	367	74	80
113.25.560	662	458	75	626	494	20	18	M16	32	4	558	562	65	10	60	0.5	5	427	86	90
113.25.630	732	528	75	696	564	24	18	M16	32	4	628	632	65	10	60	0.5	6	494.4	83	100
113.25.710	812	608	75	776	644	24	18	M16	32	4	708	712	65	10	60	0.5	6	572.4	96	110
113.28.800	922	678	82	878	722	30	22	M20	40	6	798	802	72	10	65	0.5	8	635.2	80	170
113.28.900	1022	778	82	978	822	30	22	M20	40	6	898	902	72	10	65	0.5	8	739.2	93	190
113.28.1000	1122	878	82	1078	922	36	22	M20	40	6	998	1002	72	10	65	0.5	10	824	83	210
113.28.1120	1242	998	82	1198	1042	36	22	M20	40	6	1118	1122	72	10	65	0.5	10	944	95	230
113.32.1250	1390	1110	91	1337	1163	40	26	M24	48	5	1248	1252	81	10	75	0.5	12	1048.8	88	350
113.32.1400	1540	1260	91	1487	1313	40	26	M24	48	5	1398	1402	81	10	75	0.5	12	1192.8	100	400
113.32.1600	1740	1460	91	1687	1513	45	26	M24	48	5	1598	1602	81	10	75	0.5	14	1391.6	100	440
113.32.1800	1940	1660	91	1887	1713	45	26	M24	48	5	1798	1802	81	10	75	0.5	14	1573.6	113	500
113.40.2000	2178	1825	112	2110	1891	48	33	M30	60	8	1997	2003	100	12	90	0.5	16	1734.4	109	900
113.40.2240	2418	2065	112	2350	2131	48	33	M30	60	8	2237	2243	100	12	90	0.5	16	1990.4	125	1000
113.40.2500	2678	2325	112	2610	2391	56	33	M30	60	8	2497	2503	100	12	90	0.5	18	2239.2	125	1100
113.40.2800	2978	2625	112	2910	2691	56	33	M30	60	8	2797	2803	100	12	90	0.5	18	2527.2	141	1250
113.50.3150	3376	2922	134	3286	3014	56	45	M42	84	8	3147	3153	122	12	110	0.5	20	2628	14	2150
113.50.3550	3776	3322	134	3686	3414	56	45	M42	84	8	3547	3553	122	12	110	0.5	20	3228	162	2470
113.50.4000	4226	3772	134	4136	3864	60	45	M42	84	10	3997	4003	122	12	110	0.5	22	3660.8	16	2800
113.50.4500	4726	4272	134	4636	4364	60	45	M42	84	10	4497	4503	122	12	110	0.5	22	4166.8	190	3100

LTZC Excavator Slew Ring Specifications

Bearing Model	Dimensions			Mounting Dimensions						Structural Dimension					Gear data					weight
Bearing Model	Dmm	dmm	Hmm	D1mm	D2mm	n	omm	dmmm	Lmm	n1	D3mm	d1mm	H1mm	hmm	bmm	x	Mmm	Demm	z	weight
113.25.500	602	398	75	566	434	20	18	M16	32	4	498	502	65	10	60	0.5	5	367	74	80
113.25.560	662	458	75	626	494	20	18	M16	32	4	558	562	65	10	60	0.5	5	427	86	90
113.25.630	732	528	75	696	564	24	18	M16	32	4	628	632	65	10	60	0.5	6	494.4	83	100
113.25.710	812	608	75	776	644	24	18	M16	32	4	708	712	65	10	60	0.5	6	572.4	96	110
113.28.800	922	678	82	878	722	30	22	M20	40	6	798	802	72	10	65	0.5	8	635.2	80	170
113.28.900	1022	778	82	978	822	30	22	M20	40	6	898	902	72	10	65	0.5	8	739.2	93	190
113.28.1000	1122	878	82	1078	922	36	22	M20	40	6	998	1002	72	10	65	0.5	10	824	83	210
113.28.1120	1242	998	82	1198	1042	36	22	M20	40	6	1118	1122	72	10	65	0.5	10	944	95	230
113.32.1250	1390	1110	91	1337	1163	40	26	M24	48	5	1248	1252	81	10	75	0.5	12	1048.8	88	350
113.32.1400	1540	1260	91	1487	1313	40	26	M24	48	5	1398	1402	81	10	75	0.5	12	1192.8	100	400
113.32.1600	1740	1460	91	1687	1513	45	26	M24	48	5	1598	1602	81	10	75	0.5	14	1391.6	100	440
113.32.1800	1940	1660	91	1887	1713	45	26	M24	48	5	1798	1802	81	10	75	0.5	14	1573.6	113	500
113.40.2000	2178	1825	112	2110	1891	48	33	M30	60	8	1997	2003	100	12	90	0.5	16	1734.4	109	900
113.40.2240	2418	2065	112	2350	2131	48	33	M30	60	8	2237	2243	100	12	90	0.5	16	1990.4	125	1000
113.40.2500	2678	2325	112	2610	2391	56	33	M30	60	8	2497	2503	100	12	90	0.5	18	2239.2	125	1100
113.40.2800	2978	2625	112	2910	2691	56	33	M30	60	8	2797	2803	100	12	90	0.5	18	2527.2	141	1250
113.50.3150	3376	2922	134	3286	3014	56	45	M42	84	8	3147	3153	122	12	110	0.5	20	2628	14	2150
113.50.3550	3776	3322	134	3686	3414	56	45	M42	84	8	3547	3553	122	12	110	0.5	20	3228	162	2470
113.50.4000	4226	3772	134	4136	3864	60	45	M42	84	10	3997	4003	122	12	110	0.5	22	3660.8	16	2800
113.50.4500	4726	4272	134	4636	4364	60	45	M42	84	10	4497	4503	122	12	110	0.5	22	4166.8	190	3100
114.50.4500	4726	4272	134	4636	4364	60	45	M42	84	10	4497	4503	122	12	110	0.5	25	4160	167	3100

High-Load-Capacity Excavator Slewing Bearing

Bearing Model	Dimensions			Mounting Dimensions					Structural Dimension						Gear data					Weight
Bearing Model	Dmm	dmm	Hmm	D1mm	D2mm	n	omm	dmmm	Lmm	n1	D3mm	d1mm	H1mm	hmm	bmm	x	Mmm	Demm	z	Weight
131.25.500	634	366	148	598	402	24	18	M16	32	537	526	4	138	32	80	0.5	5	664	130	224
131.25.560	694	426	148	658	462	24	18	M16	32	597	586	4	138	32	80	0.5	5	724	142	240
131.25.630	764	496	148	728	532	28	18	M16	32	667	656	4	138	32	80	0.5	6	808.8	132	270
131.25.710	844	576	148	808	612	28	18	M16	32	747	736	4	138	32	80	0.5	6	886.8	145	300
131.32.800	964	636	182	920	680	36	22	M20	40	841	830	4	172	40	120	0.5	8	1006.4	123	500
131.32.900	1064	736	182	1020	780	36	22	M20	40	941	930	4	172	40	120	0.5	8	1102.4	135	600
131.32.1000	1164	836	182	1120	880	40	22	M20	40	1041	1030	5	172	40	120	0.5	10	1218	119	680
131.32.1120	1284	956	182	1240	1000	40	22	M20	40	1161	1150	5	172	40	120	0.5	10	1338	131	820
131.40.1250	1445	1055	220	1393	1107	45	26	M24	48	1300	1287	5	210	50	150	0.5	12	1506	123	1200
131.40.1400	1595	1205	220	1543	1257	45	26	M24	48	1450	1437	5	210	50	150	0.5	12	1665.6	136	1300
131.40.1600	1795	1405	220	1743	1457	48	26	M24	48	1650	1637	6	210	50	150	0.5	14	1873.2	131	1520
131.40.1800	1995	1605	220	1943	1657	48	26	M24	48	1850	1837	6	210	50	150	0.5	14	2069.2	145	1750
131.45.2000	2221	1779	231	2155	1845	60	33	M30	60	2055	2033	6	219	54	160	0.5	16	2300.8	141	2400
131.45.2240	2461	2019	231	2395	2085	60	33	M30	60	2295	2273	6	219	54	160	0.5	16	2556.8	157	2700
131.45.2500	2721	2279	231	2655	2345	72	33	M30	60	2555	2533	8	219	54	160	0.5	18	2822.4	154	3000
131.45.2800	3021	2579	231	2955	2645	72	33	M30	60	2855	2833	8	219	54	160	0.5	18	3110.4	170	3400
131.50.3150	3432	2868	270	3342	2958	72	45	M42	84	3213	3196	8	258	65	180	0.5	20	3536	174	50000
131.50.3550	3832	3268	270	3742	3358	72	45	M42	84	3613	3596	8	258	65	180	0.5	22	3936	194	5680
131.50.4000	4282	3718	270	4192	3808	80	45	M42	84	4063	4046	8	258	65	180	0.5	22	4395.6	197	6470
131.50.4500	4782	4218	270	4692	4308	80	45	M42	84	4563	4546	8	258	65	180	0.5	22	4901.6	220	7320

LTZC Excavator Slew Ring Specifications

Bearing Model	Dimensions			Mounting Dimensions						Structural Dimension					Gear data					Weight
Bearing Model	Dmm	dmm	Hmm	D1mm	D2mm	n	omm	dmmm	Lmm	n1	D3mm	d1mm	H1mm	hmm	bmm	x	Mmm	Demm	z	Weight
133.25.500	634	366	148	598	402	24	18	M16	32	474	463	4	0	32	80	0.5	5	337	68	224
133.25.560	694	426	148	658	462	24	18	M16	32	534	523	1	10	32	80	0.5	5	397	80	240
133.25.630	764	496	148	728	532	28	18	M16	32	604	593	4	10	32	80	0.5	6	458.4	77	270
133.25.710	844	576	148	808	612	28	18	M16	32	684	673	4	10	32	80	0.5	6	536.4	90	300
133.32.800	964	636	182	920	680	36	22	M20	40	770	759	4	10	40	120	0.5	8	595.2	75	500
133.32.900	1064	736	182	1020	780	36	22	M20	40	870	859	4	10	40	120	0.5	8	691.2	87	600
133.32.100	1164	836	182	1120	880	40	22	M20	40	970	959	5	10	40	120	0.5	10	784	79	680
133.32.112	1284	956	182	1240	1000	40	22	M20	40	1090	1079	5	10	40	120	0.5	10	904	91	820
133.40.125	1445	1055	220	1393	1107	45	26	M24	48	1213	100	5	10	50	150	0.5	12	988.8	83	1200
133.40.140	1595	1205	220	1543	1257	45	26	M24	48	1363	1350	5	10	50	150	0.5	12	1145	96	1300
133.40.160	1795	1405	220	1743	1457	48	26	M24	48	1563	1550	6	10	50	150	0.5	14	1336	96	1520
133.40.180	1995	1605	220	1943	1657	48	26	M24	48	1763	1750	6	10	50	150	0.5	14	1532	110	1750
133.45.200	2221	1779	231	2155	1845	60	33	M30	60	1967	1945	6	12	54	160	0.5	16	1702	107	2400
133.45.224	2461	2019	231	2395	2085	60	33	M30	60	2207	2185	6	12	54	160	0.5	16	1926	121	2700
133.45.250	2721	2279	231	2655	2345	72	33	M30	60	2467	2445	8	12	54	160	0.5	18	2185	12	3000
133.45.280	3021	2579	231	2955	2645	72	33	M30	60	2767	2745	8	12	54	160	0.5	18	2491	139	3400
133.50.315	3432	2868	270	3342	2958	72	45	M42	84	3104	3090	8	12	65	180	0.5	20	2768	139	5000
131.50.355	3832	3268	270	3742	3358	72	45	M42	84	3504	3490	8	258	65	180	0.5	20	3168	159	5680
131.50.400	4282	3718	270	4192	3808	80	45	M42	84	3954	3940	8	258	65	180	0.5	22	311	165	6470
131.50.450	4782	4218	270	4692	4308	80	45	M42	84	4454	4440	8	258	65	180	0.5	22	4123	188	7320

LTZC Excavator Slew Ring Specifications

Bearing Model	Dimensions			Mounting Dimensions						Structural Dimension					Weight (kg)
Bearing Model	Dmm	dmm	Hmm	D1mm	D2mm	n	mm	dmmm	Lmm	nl	D3mm	d1mm	H1mm	hmm	Weight (kg)
130.25.500	634	366	148	598	402	24	18	M16	32	474	463	4	10	32	224
130.25.560	694	426	148	658	462	24	18	M16	32	534	523	4	10	32	240
130.25.630	764	496	148	728	532	28	18	M16	32	604	593	4	10	32	270
130.25.710	844	576	148	808	612	28	18	M16	32	684	673	4	10	32	300
130.32.800	964	636	182	920	680	36	22	M20	40	770	759	4	10	40	500
130.32.900	1064	736	182	1020	780	36	22	M20	40	870	859	4	10	40	600
130.32.1000	1164	836	182	1120	880	40	22	M20	40	970	959	5	10	40	680
130.32.1120	1284	956	182	1240	1000	40	22	M20	40	1090	1079	5	10	40	820
130.40.1250	1445	1055	220	1393	1107	45	26	M24	48	1213	1200	5	10	50	1200
130.40.1400	1595	1205	220	1543	1257	45	26	M24	48	1363	1350	5	10	50	1300
130.40.1600	1795	1405	220	1743	1457	48	26	M24	48	1563	1550	6	10	50	1520
130.40.1800	1995	1605	220	1943	1657	48	26	M24	48	1763	1750	6	10	50	1750
130.45.2000	2221	1779	231	2155	1845	60	33	M30	60	1967	1945	6	12	54	2400
130.45.2240	2461	2019	231	2395	2085	60	33	M30	60	2207	2185	6	12	54	2700
130.45.2500	2721	2279	231	2655	2345	72	33	M30	60	2467	2445	8	12	54	3000
130.45.2800	3021	2579	231	2955	2645	72	33	M30	60	2767	2745	8	12	54	3400
130.50.3150	3432	2868	270	3342	2958	72	45	M42	84	3104	3090	8	12	65	5000
130.50.3550	3832	3268	270	3742	3358	72	45	M42	84	3504	3490	8	258	65	5680
130.50.4000	4282	3718	270	4192	3808	80	45	M42	84	3954	3940	8	258	65	6470
130.50.4500	4782	4218	270	4692	4308	80	45	M42	84	4454	4440	8	258	65	7320

Types of Excavator Slewing Bearings

1. Single-Row Four-Point Contact Ball Slewing Bearing

The four-point contact ball slewing bearing consists of a single row of steel balls and inner and outer rings. The rolling elements make four-point contact with the raceways, enabling this lightweight slewing bearing to simultaneously withstand axial loads, radial loads, and overturning moments.

Design Features of the Four-Point Contact Ball Slewing Bearing

Single-row ball structure with integral inner and outer rings

Raceways feature circular arc grooves, ensuring four-point contact between the steel balls and the raceways

Can be manufactured with internal gearing, external gearing, or no gearing

Compact structure with small cross-sectional dimensions

Advantages of LTZC Four-Point Contact Ball Slewing Bearings

Lightweight and low-cost

Simple manufacturing process with high versatility

Low rotational resistance and flexible operation

Capable of meeting the complex load requirements of small to medium-sized equipment

Applications: Small to medium-sized excavators, cranes, and construction machinery

2. Single-Row Cross-Roller Slewing Bearing

The single-row cross-roller slewing bearing utilizes cylindrical rollers arranged in a 90° crossed configuration. The rollers establish line contact with the raceways, resulting in a high-rigidity slewing bearing capable of simultaneously withstanding multi-directional loads.

Design Features of the Single-Row Cross-Roller Slewing Bearing

Rollers are arranged in an alternating, vertically crossed pattern

Rollers establish line contact—rather than point contact—with the raceways

High rigidity and minimal clearance

Simpler structure compared to three-row roller bearings

Advantages of the Single-Row Cross-Roller Slewing Bearing

Superior load-bearing capacity compared to ball-type bearings of the same size

High rotational precision and excellent stability

Strong resistance to overturning moments

Moderate overall dimensions with high cost-effectiveness

Applications: Medium to large-sized excavators, aerial work platforms, tunnel boring machines (TBMs), etc.

3. Double-Row Different-Diameter Ball Slewing Bearing

The double-row ball slewing bearing is defined as a ball-type slewing bearing that employs two rows of steel balls , utilizing a dual-raceway configuration to enhance its load-bearing capacity.

Design Features of Double-Row Slewing Bearings

Employs a three-ring structure, requiring high assembly precision.

Retains point contact characteristics, yet offers a larger load-bearing area.

Advantages of Double-Row Ball Slewing Bearings

Load-bearing capacity is significantly higher than that of single-row ball-type bearings.

Offers superior resistance to axial forces and overturning moments.

Provides smoother and more agile rotation compared to roller-type bearings.

Offers a longer service life.

Applications: Medium-to-large tonnage excavators, truck cranes, port machinery.

4. Three-Row Roller Slewing Bearings

Three-row roller slewing bearings utilize three independent rows of rollers to separately accommodate radial forces, axial forces, and overturning moments; they are heavy-duty slewing bearings specifically designed for heavy-load operating conditions.

Design Features of Triple-Row Roller Slewing Bearings

The upper and lower rows accommodate axial forces and overturning moments.

The middle row accommodates radial forces.

Features line contact via rollers and robust, heavy-duty rings.

Characterized by large overall dimensions and extremely high rigidity.

Advantages of Three-Row Roller Slewing Bearings

Offers the highest load-bearing capacity, capable of withstanding extremely large combined loads.

Demonstrates excellent resistance to impact and deformation.

Provides exceptionally high reliability in large-scale equipment applications.

Offers a long service life and extended maintenance intervals.

Applications: Large-scale / mining excavators, marine cranes, heavy-duty metallurgical equipment.

Why choose LTZC bearings？

A Trusted Brand

With over 20 years of experience in bearing R&D, our global service network covers countries such as India and Russia, ensuring fast and efficient technical support for all bearing issues and ensuring the smooth operation of your equipment.

High-Quality Bearings

Advanced CNC production equipment and manufacturing processes guarantee bearing precision and durability. LTZC bearings also carry third-party testing reports to ensure they meet international standards.

Product Range

LTZC products include slewing bearings, slewing drives, precision thin-wall bearings, and custom bearings. They are widely used in cranes, heavy machinery, and port machinery, maintaining stable performance under harsh operating conditions.

Custom Bearings

Our experienced technical team provides customized bearing solutions for complex applications. Services include load analysis and bearing selection, service life calculations, 3D design, and engineering drawings.

LTZC slewing bearing manufacturer

LTZC Bearings is a trusted bearing manufacturer specializing in slewing bearings, slewing drives, and precision bearings. With advanced CNC machining equipment, comprehensive heat treatment, and strict quality control, our products meet international standards and are ISO certified.

We export high-quality industrial bearings to Germany, India, Russia, and Canada, earning over 10,000 satisfied customer feedbacks. With strong OEM and ODM capabilities, LTZC provides fast delivery and custom bearing solutions for heavy machinery, construction, and automation industries.

View Manufacturing Capabilities

Technology support

Pre-sales service

After-sales service

Installation & maintenance

Selection guide

Customized bearing solutions

LTZC is a professional slewing bearing manufacturer，providing a full range of custom bearing services, including slewing rings, non-standard bearings, large bearings, thin-section bearings, crossed roller bearings, and four-point contact ball bearings. Whether the requirements are special sizes, materials, or complex operating conditions, we can provide customers with the optimal solution through professional R&D and precision manufacturing.

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Feel free to get a quote on the latest price of slewing bearings for any largeapplications, please include your application, needs, requirements and otherdetails.

Slewing Bearings

Excavator slewing bearing

Brochure

Excavator slewing bearing

What is a slew ring on an excavator?

Types of Excavator Slewing Bearings

1. Single-Row Four-Point Contact Ball Slewing Bearing

2. Single-Row Cross-Roller Slewing Bearing

3. Double-Row Different-Diameter Ball Slewing Bearing

4. Three-Row Roller Slewing Bearings

Why choose LTZC bearings？

A Trusted Brand

High-Quality Bearings

Product Range

Custom Bearings

LTZC slewing bearing manufacturer

Technology support

Pre-sales service

After-sales service

Installation & maintenance

Selection guide

Customized bearing solutions

Related Products

Cross Roller Slewing Ring

Flanged Slewing Bearing

Customized Bearings

Single-row ball slewing ring

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partners

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