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Four-point contact ball slewing bearing

Name: Four-point contact ball slewing bearing
Brand: Luoyang Jiuliang Bearing Co., Ltd.
Availability: InStock

Product Description:

A four-point-contact ball slewing bearing is a specially designed mechanical bearing used to support and rotate large structures, such as lifting equipment, rotating platforms, wind turbines, and construction machinery.

Phone: 86-13939909508

Email: lyjiuliang@foxmail.com

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Product Details

Product Description

Commodity name: Four-point contact ball slewing bearing

A four-point-contact ball slewing bearing is a specially designed mechanical bearing used to support and rotate large structures, such as lifting equipment, rotary platforms, wind turbines, and construction machinery. The following provides detailed information about four-point-contact ball slewing bearings:

Four-point contact ball slewing bearing

Structural features:

Four-Point Contact Design: The four-point contact ball slewing bearing derives its name from the arrangement of its balls. It features four contact points evenly distributed between the inner and outer rings, forming an X‑like configuration. This design enables the bearing to simultaneously handle radial and axial loads without requiring additional support. Compared with two-point contact bearings, four-point contact ball bearings offer greater versatility.

Inner and Outer Rings: Bearings typically consist of an inner ring and an outer ring. The inner ring is mounted to the machine component, while the outer ring is attached to the base or supporting structure. The clearance between the inner and outer rings enables the bearing to rotate.

Rolling elements: Between the inner and outer rings, four rolling elements—typically balls—are provided. These balls enable the bearing to roll, thereby supporting the load while reducing friction and wear.

Sealing Device: Four-point contact ball slewing bearings are typically equipped with sealing devices to protect the bearing interior from contaminants and moisture. These seals help extend the bearing’s service life.

Connection Structure: The inner and outer rings are typically securely joined by a connection mechanism—such as bolts or retaining clips—to ensure the overall stability of the bearing.

Free Rotation: The four-point-contact ball slewing bearing is designed to enable continuous 360-degree free rotation without the need for additional drive mechanisms. This free-rotation capability is particularly advantageous in applications requiring omnidirectional rotation.

Product Specifications

Four-point contact ball slewing bearing model specifications
Model number			Dimensions (mm)										Gear parameters		External tooth		Internal gear
Toothless	External tooth	Internal gear	D	d	H	D1	d1	dn	n	n1	H1	h	b	m	from	z	from	z
010.20.250	011.20.250		330	170	60	298	202	16	18	2	50	10	40	4	352	86
010.20.280	011.20.280		360	200	60	328	232	16	18	2	50	10	40	4	348	94
010.25.315	011.25.315	013.25.315	408	222	70	372	258	18	20	2	60	10	50	5	435	85	190	40
010.25.355	011.25.355	013.25.355	448	262	70	412	298	18	20	2	60	10	50	5	475	93	235	49
010.25.400	011.25.400	013.25.400	493	307	70	457	343	18	24	2	60	10	50	6	528	86	276	48
010.25.450	011.25.450	013.25.450	543	357	70	507	393	18	24	2	60	10	50	6	576	94	324	56
010.30.500	011.30.500	013.30.500	602	398	80	566	434	18	20	4	70	10	60	5	629	123	367	74
	012.30.500	014.30.500	602	398	80	566	434	18	20	4	70	10	60	6	629	102	368	62
010.30.560	011.30.560	013.30.560	662	458	80	626	494	18	20	4	70	10	60	5	689	135	427	86
	012.30.560	014.30.560	662	458	80	626	494	18	20	4	70	10	60	6	689	112	428	72
010.30.630	011.30.630	013.30.630	732	528	80	696	564	18	24	4	70	10	60	6	773	126	494	83
	012.30.630	014.30.630	732	528	80	696	564	18	24	4	70	10	60	8	774	94	491	62
010.30.710	011.30.710	013.30.710	812	608	80	776	644	18	24	4	70	10	60	6	851	139	572	96
	012.30.710	014.30.710	812	608	80	776	64	18	24	4	70	10	60	8	854	104	571	72
010.40.800	011.40.800	013.40.800	922	678	100	878	722	22	30	6	90	10	80	8	966	118	635	80
	012.40.800	014.40.800	922	678	100	878	722	22	30	6	90	10	80	10	968	94	634	64
010.40.900	011.40.900	013.40.900	1022	778	100	978	822	22	30	6	90	10	80	8	1062	130	739	93
	012.40.900	014.40.900	1022	778	100	978	822	22	30	6	90	10	80	10	1068	104	734	74