What are the main applications for four point contact ball bearings?

Four point contact ball bearings are primarily used in heavy-duty machinery, such as construction equipment, mining machinery, and automotive transmissions. They are chosen for their ability to handle high loads and provide stable operation in environments where reliability is critical.

How do toothless bearings differ from standard ball bearings?

Toothless bearings, like our four point contact ball bearings, do not have teeth on the outer ring, which reduces friction and the risk of damage from external contaminants. This design is beneficial in applications where debris or dirt could interfere with the bearing's operation, ensuring smoother and more reliable performance.

What maintenance is required for these bearings?

Proper maintenance of four point contact ball bearings involves regular inspections for wear, ensuring that the lubrication is adequate, and checking for any signs of contamination. It is also important to replace the bearings when they show signs of excessive wear or damage to prevent further damage to the machinery.

Four Point Contact Ball Bearings (Toothless)

Robust and Reliable Toothless Bearings

Our four point contact ball bearings are engineered for high load capacities and are ideal for applications requiring both radial and axial load support. These toothless bearings are crafted from chrome steel, providing exceptional strength and resistance to wear. They are widely used in heavy machinery, industrial equipment, and automotive transmissions where high reliability and minimal friction are crucial.

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KVSU20 Series 4-Point Contact Ball Slewing Bearing

Model	Outer Diameter D	Outer Locating Shoulder Dzt	Bore d	Inner Locating Shoulder dzt	Outer Ring Inner Dia d1	Inner Ring Outer Dia D1	Axial Dynamic Load Ca	Axial Static Load Coa	Radial Dynamic Load Cr	Radial Static Load Cor	Outer Ring PCD1	Mount Hole	Inner Ring PCD2	Mount Hole	Axial Clearance	Radial Clearance
KVSU200414	486	484	342	344	415.5	412.5	169	560	111	248	460	24-M14	369	24-M14	0～0.05	0～0.08
KVSU200544	616	614	472	474	454.5	542.5	188	740	123	625	590	32-M14	498	32-M14	0～0.05	0～0.08
KVSU200644	716	714	572	574	645.5	642.5	200	880	131	685	690	36-M14	598	36-M14	0～0.05	0～0.08
KVSU200744	816	814	672	674	745.5	742.5	211	1010	138	445	790	40-M14	698	40-M14	0～0.05	0～0.08
KVSU200844	916	914	772	774	845.5	842.5	222	1150	145	510	890	40-M14	798	40-M14	0～0.05	0～0.08
KVSU200944	1016	1014	872	874	945.5	942	231	1280	151	570	990	44-M14	898	44-M14	0～0.05	0～0.08
KVSU2001094	1166	1164	1022	1024	1095.5	1092.5	244	1490	160	660	1140	48-M14	1048	48-M14	0～0.05	0～0.08

KVU Series 4-Point Contact Ball Slewing Bearing

Model	Outer Diameter D	Minor Outer Dia Da	Outer Shoulder T	Bore d	Major Inner Dia di	Inner Shoulder t	Ring Height h	Mounting Height H	Axial Dynamic Load Ca	Axial Static Load Coa	Radial Dynamic Load Cr	Radial Static Load Cor	Outer Ring PCD1	Mount Hole	Inner Ring PCD2	Mount Hole	Axial Clearance	Radial Clearance
KVU140179	234	232	5	124.5	126.5	5	30	35	115	255	75	114	214	12-M11	144.5	12-M11	0.07～0.23	0.04～0.14
KVU200220	302	300	6	138	140	6	41	46	201	435	132	197	270	10-M18	170	10-M18	0.08～0.33	0.05～0.20
KVU130225	290	—	—	200	—	—	24	24	49	87	46	39.5	270	6-M12	—	—	0.05～0.16	0.02～0.06
KVU200260	329	327	7	191	193	7	41	46	217	520	143	233	305	20-M14	215	20-M14	0.08～0.33	0.05～0.20
KVU140325	380	378	5	270	272	5	30	35	146	460	95	208	360	24-M11	290	24-M11	0.07～0.23	0.04～0.14
KVU250380	485	483	8	275	288	8	50	55	350	800	230	360	453	16-M18	307	16-M18	0.11～0.41	0.06～0.25
KVU200405	474	472	7	336	338	7	41	46	260	810	169	360	450	30-M14	360	30-M14	0.08～0.33	0.05～0.20
KVU250433	522	520	8	344	346	8	50	55	370	910	243	410	460	20-M18	376	20-M18	0.07～0.41	0.06～0.25
KVU300574	680	678	10	468	470	10	61	68	495	1540	325	690	640	20-M22	508	20-M22	0.13～0.49	0.08～0.30
KVU360680	795	793	11	565	567	11	72	79	640	2260	415	1020	755	30-M22	605	30-M22	0.15～0.59	0.09～0.36

KVSU25 Series 4-Point Contact Ball Slewing Bearing

Model	Outer Diameter D	Minor Outer Dia Da	Outer Shoulder T	Bore d	Major Inner Dia di	Inner Shoulder t	Ring Height h	Mounting Height H	Axial Dynamic Load Ca	Axial Static Load Coa	Radial Dynamic Load Cr	Radial Static Load Cor	Outer Ring PCD1	Mount Hole	Inner Ring PCD2	Mount Hole	Axial Clearance	Radial Clearance
KVSU250755	855	853	15	655	657	15	54	63	460	2250	300	1010	815	24-M22	695	24-M22	0.03–0.13	0.05–0.24
KVSU250855	955	953	15	755	757	15	54	63	485	2550	315	1150	915	28-M22	795	28-M22	0.03–0.13	0.05–0.24
KVSU250955	1055	1053	15	855	857	15	54	63	500	2850	330	1280	1015	30-M22	895	30-M22	0.03–0.13	0.05–0.24
KVSU2501055	1155	1153	15	955	957	15	54	63	520	3510	340	1410	1155	30-M22	995	30-M22	0.03–0.13	0.05–0.24

KVLU20 Series 4-Point Contact Ball Slewing Bearing

Model	Outer Diameter D	Outer Dia (Dzt-IT8)	Outer Ring Inner Dia d1	Bore d	Inner Dia (dzt+IT8)	Inner Ring Outer Dia D1	Axial Dynamic Load Ca	Axial Static Load Coa	Radial Dynamic Load Cr	Radial Static Load Cor	Outer Ring PCD1	Mount Hole Quantity na	Inner Ring PCD2	Mount Hole Quantity ni
KVLU200414	518-0.5	516	415.5	304+0.5	306	412.5	169	295	111	110	490	8	332	12
KVLU200544	648-0.5	646	545.5	434+0.5	436	542.5	188	385	123	145	620	10	462	14
KVLU200644	748-0.6	746	645.5	534+0.6	536	642.5	200	455	131	171	720	12	562	16
KVLU200744	848-0.6	846	745.5	634+0.6	636	742.5	211	530	138	198	820	12	662	16
KVLU200844	948-0.6	946	845.5	734+0.6	736	842.5	222	600	145	224	920	14	762	18
KVLU200944	1048-0.7	1046	945.5	834+0.7	836	942.5	231	670	151	250	1020	16	862	20
KVLU201094	1198-0.7	1196	1095.5	984+0.7	986	1092.5	244	770	160	290	1190	16	1012	20

Why Choose Four Point Contact Ball Bearings for Heavy-Duty Applications?

Four point contact ball bearings are designed to accommodate both radial and axial loads, making them indispensable in heavy-duty machinery. The toothless design reduces friction, which is essential for applications where efficiency and longevity are paramount. These bearings are manufactured from chrome steel, a material known for its high strength and resistance to deformation, ensuring a long service life even under extreme conditions.

These bearings are commonly used in industries such as construction, mining, and automotive, where equipment must withstand high stress and operate reliably for extended periods. The absence of teeth on the outer ring allows for smoother operation and reduces the risk of damage from debris, making them suitable for environments with potential contamination.

Compared to other bearing types, four point contact ball bearings offer superior load distribution and stability. Their design ensures that the load is evenly distributed across the four contact points, reducing stress on individual balls and extending the overall life of the bearing. This makes them a preferred choice for applications where reliability and performance are non-negotiable.

High load capacity due to the four-point contact design
Chrome steel construction for superior strength and durability
Toothless operation for reduced friction and increased efficiency

Key Technical Features and Benefits

STEP 1

Four-Point Contact Design

This design allows for the distribution of both radial and axial loads, enhancing the bearing's overall stability and load capacity. The four contact points reduce stress on individual balls, leading to a longer service life.

STEP 2

Chrome Steel Material

Made from high-quality chrome steel, these bearings offer exceptional strength and resistance to wear. This material choice is crucial for withstanding the high loads and harsh conditions often found in industrial applications.

STEP 3

Toothless Operation

The absence of teeth on the outer ring minimizes friction and the risk of damage from external contaminants, making these bearings suitable for environments where debris could interfere with operation.

STEP 4

ABEC-5 Tolerance

These bearings are manufactured to ABEC-5 tolerance standards, ensuring high precision and accuracy. This level of precision is essential for applications requiring smooth and reliable operation.