Four Point Contact Ball Slewing Bearing-Slewing Bearings-Products-LTZC

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Four Point Contact Ball Slewing Bearing

The four-point contact ball slewing bearing—also known as a single-row ball slewing bearing—is a lightweight type of slewing bearing featuring a single row of rolling elements that form a four-point contact structure with the raceway. Characterized by its simple structure, light weight, and low cost, this type of slewing bearing offers excellent cost-effectiveness and is typically utilized in equipment subject to light to moderate loads.

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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Four Point Contact Ball Slewing Bearing

What is four point contact ball slewing bearings？

The four-point contact ball slewing bearing is the most widely applied and structurally simplest—serving as the core foundational model—among all types of slewing bearings. Featuring a single row of rolling balls, this bearing establishes four points of contact with its raceways and is capable of withstanding axial loads in both directions. During slewing operations, the rolling balls engage with the raceways under low-speed friction. This structural design results in minimal friction, moderate rotational speeds, and light weight, making it ideally suited for equipment operating under medium-to-light loads—such as excavators, cranes, truck-mounted cranes, and radar antennas.

What is a 4 point contact ball Slewing bearing used for?

Four-point contact ball bearings are capable of simultaneously withstanding axial loads, radial loads, and overturning moments; thanks to their compact structure and high rigidity, their application is highly concentrated in equipment requiring 360° rotation while being subjected to complex loading conditions.

Four-point contact ball slewing bearings are versatile slewing rings widely applied in:

Construction Machinery: Small excavators, truck-mounted cranes, mobile cranes, aerial work platforms, rotary drilling rigs

Industrial Equipment: Welding manipulators, rotary worktables, solar/PV tracking systems, packaging machinery

Port & Marine: Small deck cranes, yacht rotating platforms, port handling equipment

Specialized Equipment: Amusement rides, radar antennas, wind power yaw/pitch systems (small-scale units)

LTZC precision slewing ring

LTZC bearings are machined using ultra-precision grinding equipment with a 'three-grind, three-inspection' process, and are equipped with a precision roundness tester to accurately detect parameters such as inner/outer diameter tolerance, roundness, and runout, with a testing accuracy of 0.01μm. Each batch of products undergoes 100% inspection to meet the following accuracy levels, ensuring high-precision bearings for our customers.

Precision Grade	Bore Tolerance (φ50 mm)	Outer Diameter Tolerance (φ90 mm)	Radial Runout	Axial Runout	Raceway Roundness Error	Raceway Surface Roughness Ra
P0	0 ~ -10 μm	0 ~ -13 μm	≤ 15 μm	≤ 15 μm	±0.015 mm	≤ 1.6 μm
P6	0 ~ -8 μm	0 ~ -8 μm	≤ 10 μm	≤ 10 μm	±0.010 mm	≤ 1.25 μm
P5	0 ~ -6 μm	0 ~ -5 μm	≤ 6 μm	≤ 8 μm	±0.008 mm	≤ 0.8 μm
P4	0 ~ -5 μm	0 ~ -3 μm	≤ 3 μm	≤ 4 μm	±0.005 mm	≤ 0.4 μm
P2	0 ~ -3 μm	0 ~ -2 μm	≤ 2 μm	≤ 3 μm	±0.003 mm	≤ 0.2 μm

LTZC customized 4 point contact ball Slewing bearing solutions

LTZC specializes in the custom manufacturing of four-point contact ball slewing bearings, providing high-precision slewing support solutions for engineering machinery, photovoltaic tracking systems, port machinery, radar antennas, and automation equipment. As an experienced manufacturer of four-point contact ball slewing bearings, LTZC employs a single-row ball slewing bearing, four-point contact structure featuring a precision "peach-shaped" raceway design; this configuration enables the bearing to simultaneously withstand axial loads, radial loads, and overturning moments, offering exceptional rigidity, high rotational precision, and a long service life. We support full-specification customization—including internal gearing, external gearing, and gearless configurations—and offer optional specialized processes such as enhanced sealing, anti-corrosion coatings, lightweight materials, and high-precision clearance control, making our bearings ideally suited for various heavy-duty applications, scenarios involving frequent oscillation, and harsh outdoor operating environments. Leveraging national-standard manufacturing protocols and 30 years of expertise in bearing production, LTZC provides global clients with stable, reliable product selection guidance and rapid delivery services for customized slewing bearings, large-scale turntable bearings, and slewing rings.

Four Point Contact Ball Slewing Bearing With External Gear

Bearing Model	Dimensions			Mounting Dimensions						Structural Dimension							Gear data			weight (kg)
Bearing Model	Dmm	dmm	Hmm	D1mm	D2mm	n	omm	dmmm	Lmm	n1	D3mm	d1mm	H1mm	hmm	bmm	x	Mmm	Demm	z	weight (kg)
011.45.1400	1540	1260	110	1487	1313	40	26	M24	48	5	1402	1398	100	10	90	0.5	12	1605.6	131	480
011.35.1400	1540	1260	110	1487	1313	40	26	M24	48	5	1401	1398	100	10	90	0.5	12	1605.6	131	480
011.45.1600	1740	1460	110	1687	1513	45	26	M24	48	5	1602	1598	100	10	90	0.5	14	1817.2	127	550
011.35.1600	1740	1460	110	1687	1513	45	26	M24	48	5	1601	1598	100	10	90	0.5	14	1817.2	127	550
011.45.1800	1940	1660	110	1887	1713	45	26	M24	48	5	1802	1798	100	10	90	0.5	14	2013.2	141	610
011.35.1800	1940	1660	110	1887	1713	45	26	M24	48	5	1801	1798	100	10	90	0.5	14	2013.2	141	610
011.60.2000	2178	1825	144	2110	1891	48	33	M30	60	8	2002	1998	132	12	120	0.5	16	2268.8	139	1100
011.40.2000	2178	1825	144	2110	1891	48	33	M30	60	8	2001	1998	132	12	120	0.5	16	2268.8	139	1100
011.60.2240	2418	2065	144	2350	2131	48	33	M30	60	8	2242	2238	132	12	120	0.5	16	2492.8	153	1250
011.40.2240	2418	2065	144	2350	2131	48	33	M30	60	8	2241	2238	132	12	120	0.5	16	2492.8	153	1250
011.60.2500	2678	2325	144	2610	2391	56	33	M30	60	8	2502	2498	132	12	120	0.5	18	2768.4	151	1400
011.40.2500	2678	2325	144	2610	2391	56	33	M30	60	8	2501	2498	132	12	120	0.5	18	2768.4	151	1400
011.60.2800	2978	2625	144	2910	2691	56	33	M30	60	8	2802	2798	132	12	120	0.5	18	3074.4	168	1600
011.40.2800	2978	2625	144	2910	2691	56	33	M30	60	8	2802	2798	132	12	120	0.5	18	3074.4	168	1600
011.75.3150	3376	2922	174	3286	3014	56	45	M42	84	8	3152	3147	162	12	150	0.5	20	3476	171	2800
011.50.3150	3376	2922	174	3286	3014	56	45	M42	84	8	3152	3147	162	12	150	0.5	20	3476	171	2800
011.75.3550	3776	3322	174	3686	3014	56	45	M42	84	8	3552	3547	162	12	150	0.5	20	3876	191	3500
011.50.3550	3776	3322	174	3686	3014	56	45	M42	84	10	3552	3548	162	12	150	0.5	20	3876	191	3500
011.75.4000	4226	3772	174	4136	3864	60	45	M42	84	10	4002	3997	162	12	150	0.5	22	4329.6	194	4200

Four Point Contact Ball Slewing Bearing With Inner Gear

Bearing Model	Dimensions			Mounting Dimensions						Structural Dimension							Gear data			weight (kg)
Bearing Model	Dmm	dmm	Hmm	D1mm	D2mm	n	mm	dmmm	Lmm	n1	D3mm	d1mm	HImm	hmm	bmm	x	Mmm	Demm	z	weight (kg)
013.25.315	408	222	70	372	258	20	18	M16	32	2	316	314	60	10	50	0	5	190	40	49
013.25.355	448	262	70	412	298	20	18	M16	32	2	356	354	60	10	50	0	5	235	49	54
013.25.400	493	307	70	457	343	20	18	M16	32	2	401	399	60	10	50	0	6	276	48	62
013.25.450	543	357	70	507	393	20	18	M16	32	2	451	449	60	10	50	0	6	324	56	71
013.30.500	602	398	80	566	434	20	18	M16	32	4	501	498	70	10	60	0.5	5	367	74	85
013.25.500	602	398	80	566	434	20	18	M16	32	4	501	499	70	10	60	0.5	5	367	74	85
013.30.560	662	458	80	626	494	20	18	M16	32	4	561	558	70	10	60	0.5	5	427	86	95
013.25.560	662	458	80	626	494	20	18	M16	32	4	561	559	70	10	60	0.5	5	427	86	95
013.30.630	732	528	80	696	564	24	18	M16	32	4	631	628	70	10	60	0.5	6	494.4	83	110
013.25.630	732	528	80	696	564	24	18	M16	32	4	631	629	70	10	60	0.5	6	494.4	83	110
013.30.710	812	608	80	776	644	24	18	M16	32	4	711	708	70	10	60	0.5	6	572.4	96	120
013.25.710	812	608	80	776	644	24	18	M16	32	4	711	709	70	10	60	0.5	6	572.4	96	120
013.40.800	922	678	100	878	722	30	22	M20	40	6	801	798	90	10	80	0.5	8	635.2	80	220
013.30.800	922	678	100	878	722	30	22	M20	40	6	801	798	90	10	80	0.5	8	635.2	80	220
013.40.900	1022	778	100	978	822	30	22	M20	40	6	901	898	90	10	80	0.5	8	739.2	93	240
013.30.900	1022	778	100	978	822	30	22	M20	40	6	901	898	90	10	80	0.5	8	739.2	93	240
013.40.1000	1122	878	100	1078	922	36	22	M20	40	6	1001	998	90	10	80	0.5	10	824	83	270
013.30.1000	1122	878	100	1078	922	36	22	M20	40	6	1001	998	90	10	80	0.5	10	824	83	270
013.40.1120	1242	998	100	1198	1042	36	22	M20	40	6	1121	1118	90	10	80	0.5	10	944	95	300
013.30.1120	1242	998	100	1198	1042	36	22	M20	40	6	1121	1118	90	10	80	0.5	10	944	95	300
013.45.1250	1390	1110	110	1337	1163	40	26	M24	48	5	1252	1248	100	10	90	0.5	12	1049	88	420

Four Point Contact Ball Slewing Bearing Without Gear

Bearing Model	Dimensions			Mounting Dimensions						Structural Dimension							Gear data			weight (kg)
Bearing Model	Dmm	dmm	Hmm	D1mm	D2mm	n	omm	dmmm	Lmm	n1	D3mm	d1mm	H1mm	hmm	bmm	x	Mmm	Demm	z	weight (kg)
011.45.1400	1540	1260	110	1487	1313	40	26	M24	48	5	1402	1398	100	10	90	0.5	12	1605.6	131	480
011.35.1400	1540	1260	110	1487	1313	40	26	M24	48	5	1401	1398	100	10	90	0.5	12	1605.6	131	480
011.45.1600	1740	1460	110	1687	1513	45	26	M24	48	5	1602	1598	100	10	90	0.5	14	1817.2	127	550
011.35.1600	1740	1460	110	1687	1513	45	26	M24	48	5	1601	1598	100	10	90	0.5	14	1817.2	127	550
011.45.1800	1940	1660	110	1887	1713	45	26	M24	48	5	1802	1798	100	10	90	0.5	14	2013.2	141	610
011.35.1800	1940	1660	110	1887	1713	45	26	M24	48	5	1801	1798	100	10	90	0.5	14	2013.2	141	610
011.60.2000	2178	1825	144	2110	1891	48	33	M30	60	8	2002	1998	132	12	120	0.5	16	2268.8	139	1100
011.40.2000	2178	1825	144	2110	1891	48	33	M30	60	8	2001	1998	132	12	120	0.5	16	2268.8	139	1100
011.60.2240	2418	2065	144	2350	2131	48	33	M30	60	8	2242	2238	132	12	120	0.5	16	2492.8	153	1250
011.40.2240	2418	2065	144	2350	2131	48	33	M30	60	8	2241	2238	132	12	120	0.5	16	2492.8	153	1250
011.60.2500	2678	2325	144	2610	2391	56	33	M30	60	8	2502	2498	132	12	120	0.5	18	2768.4	151	1400
011.40.2500	2678	2325	144	2610	2391	56	33	M30	60	8	2501	2498	132	12	120	0.5	18	2768.4	151	1400

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.

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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.

Ball-Roller Combined Slewing Ring

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Four Point Contact Ball Slewing Bearing

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Single-row ball slewing ring

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Three-row roller slewing Ring

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Slewing Bearings

Four Point Contact Ball Slewing Bearing

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Four Point Contact Ball Slewing Bearing

What is four point contact ball slewing bearings？

What is a 4 point contact ball Slewing bearing used for?

LTZC customized 4 point contact ball Slewing bearing solutions

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

Ball-Roller Combined Slewing Ring

Four Point Contact Ball Slewing Bearing

Single-row ball slewing ring

Three-row roller slewing Ring

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Construction & Heavy Machinery

Wind & Renewable Energy

Industrial Automation

Communication & Aerospace

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