Four Point Contact Thin Section Ball Bearing

Komel Bearing Co., Ltd. is a leading Four Point Contact Thin Section Ball Bearing manufacturer and supplier in China. We have been specialized in bearing filed for many years. Our products have a good price advantage and we have exported our bearings to many markets. We look forward to become your long-term partner in China.

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Product Description

The Four Point Contact Thin Section Ball Bearing produced by KOMEL are precision bearings. The cross-section of the bearing is mostly square. In the same series, regardless of the changes in the shaft diameter and the bearing bore, the cross-sectional dimensions remain unchanged. This design helps maintain consistent performance and structural stability among bearings of different size specifications.

The thickness between the inner and outer diameters is relatively small, usually less than 10% of the bearing diameter. This gives the bearing a smaller cross-section and axial dimension, achieving the miniaturization and lightweight of the product, and making it suitable for applications where space is limited or where weight is a sensitive factor.

Both the raceways of the inner and outer rings are in the shape of pointed arch grooves, and theoretically, the steel balls have four-point contact with the inner and outer rings. This design enables the bearing to withstand radial loads, bidirectional axial loads, and overturning moments. It can be equivalent to two angular contact ball bearings installed back-to-back, but its width is only equivalent to that of a single set of angular contact ball bearings, effectively saving installation space.

These bearings are characterized by high load-bearing capacity, high precision, low friction, and lightweight, and are widely applied in fields such as industrial robots, medical devices, aerospace, machine tools, and optoelectronics and optics.

Four Point Contact Thin Section Ball Bearing

Parameter (Specification)

KAA SERIES
Kaydon Bearing Number	Dimensions in Inches
					Weight
					in
					Pounds
	Bore	Outside Diameter	Land	Land
	Bore	Outside Diameter	Dia. L1	Dia. L2
KAA10XL0	1.000	1.375	1.140	1.235	0.026
KAA15XL0	1.500	1.875	1.640	1.735	0.039
KAA17XL0	1.750	2.125	1.890	1.985	0.045

KA SERIES
Kaydon Bearing Number	Dimensions in Inches
					Weight
					in
					Pounds
	Bore	Outside Diameter	Land	Land
	Bore	Outside Diameter	Dia. L1	Dia. L2
KA020XP0	2.000	2.500	2.186	2.314	0.1
KA025XP0	2.500	3.000	2.686	2.814	0.13
KA030XP0	3.000	3.500	3.186	3.314	0.15
KA035XP0	3.500	4.000	3.686	3.814	0.18
KA040XP0	4.000	4.500	4.186	4.314	0.19
KA042XP0	4.250	4.750	4.436	4.564	0.2
KA045XP0	4.500	5.000	4.686	4.814	0.22
KA047XP0	4.750	5.250	4.936	5.064	0.23
KA050XP0	5.000	5.500	5.186	5.314	0.24
KA055XP0	5.500	6.000	5.686	5.814	0.25
KA060XP0	6.000	6.500	6.186	6.314	0.28
KA065XP0	6.500	7.000	6.686	6.814	0.3
KA070XP0	7.000	7.500	7.186	7.314	0.31
KA075XP0	7.500	8.000	7.686	7.814	0.34
KA080XP0	8.000	8.500	8.186	8.314	0.38
KA090XP0	9.000	9.500	9.186	9.314	0.44
KA100XP0	10.000	10.500	10.186	10.314	0.5
KA110XP0	11.000	11.500	11.186	11.314	0.52
KA120XP0	12.000	12.500	12.186	12.314	0.56

KB SERIES
Kaydon Bearing Number	Dimensions in Inches
					Weight
					in
					Pounds
	Bore	Outside Diameter	Land	Land
	Bore	Outside Diameter	Dia. L1	Dia. L2
KB020XP0	2.000	2.625	2.231	2.393	0.16
KB025XP0	2.500	3.125	2.731	2.893	0.20
KB030XP0	3.000	3.625	3.231	3.393	0.24
KB035XP0	3.500	4.125	3.731	3.893	0.27
KB040XP0	4.000	4.625	4.231	4.393	0.30
KB042XP0	4.250	4.875	4.481	4.643	0.31
KB045XP0	4.500	5.125	4.731	4.893	0.33
KB047XP0	4.750	5.375	4.981	5.143	0.34
KB050XP0	5.000	5.625	5.231	5.393	0.38
KB055XP0	5.500	6.125	5.731	5.893	0.41
KB060XP0	6.000	6.625	6.231	6.393	0.44
KB065XP0	6.500	7.125	6.731	6.893	0.47
KB070XP0	7.000	7.625	7.231	7.393	0.5
KB075XP0	7.500	8.125	7.731	7.893	0.53
KB080XP0	8.000	8.625	8.231	8.393	0.57
KB090XP0	9.000	9.625	9.231	9.393	0.66
KB100XP0	10.000	10.625	10.231	10.393	0.73
KB110XP0	11.000	11.625	11.231	11.393	0.75
KB120XP0	12.000	12.625	12.231	12.393	0.83
KB140XP0	14.000	14.625	14.231	14.393	1.05
KB160XP0	16.000	16.625	16.231	16.393	1.20
KB180XP0	18.000	18.625	18.231	18.383	1.35
KB200XP0	20.000	20.625	20.231	20.393	1.5

KC SERIES
Kaydon Bearing Number	Dimensions in Inches
					Weight
					in
					Pounds
	Bore	Outside Diameter	Land	Land
	Bore	Outside Diameter	Dia. L1	Dia. L2
KC040XP0	4.000	4.750	4.277	4.473	0.45
KC042XP0	4.250	5.000	4.527	4.723	0.47
KC045XP0	4.500	5.250	4.777	4.973	0.48
KC047XP0	4.750	5.500	5.027	5.223	0.5
KC050XP0	5.000	5.750	5.277	5.473	0.58
KC055XP0	5.500	6.250	5.777	5.973	0.59
KC060XP0	6.000	6.750	6.277	6.473	0.63
KC065XP0	6.500	7.250	6.777	6.973	0.68
KC070XP0	7.000	7.750	7.277	7.473	0.73
KC075XP0	7.500	8.250	7.777	7.973	0.78
KC080XP0	8.000	8.750	8.277	8.473	0.84
KC090XP0	9.000	975.000	9.277	9.473	0.94
KC100XP0	10.000	10.750	10.277	10.473	1.06
KC110XP0	11.000	11.750	11.277	11.473	1.16
KC120XP0	12.000	12.750	12.277	12.473	1.25
KC140XP0	14.000	14.750	14.277	14.473	1.52
KC160XP0	16.000	16.750	16.277	16.473	1.73
KC180XP0	18.000	18.750	18.277	18.473	1.94
KC200XP0	20.000	20.750	20.277	20.473	2.16
KC250XP0	25.000	25.750	25.277	25.473	2.69
KC300XP0	30.000	30.750	30.277	30.473	3.21

KD SERIES
Kaydon Bearing Number	Dimensions in Inches
					Weight
					in
					Pounds
	Bore	Outside Diameter	Land	Land
	Bore	Outside Diameter	Dia. L1	Dia. L2
KD040XP0	4.000	5.000	4.370	4.630	0.78
KD042XP0	4.250	5.250	4.620	4.880	0.83
KD045XP0	4.500	5.500	4.870	5.130	0.88
KD047XP0	4.750	5.750	5.120	5.380	0.94
KD050XP0	5.000	6.000	5.370	5.630	1.00
KD055XP0	5.500	6.500	5.870	6.130	1.06
KD060XP0	6.000	7.000	6.370	6.630	1.16
KD065XP0	6.500	7.500	6.870	7.130	1.22
KD070XP0	7.000	8.000	7.370	7.630	1.31
KD075XP0	7.500	9.000	7.870	8.130	1.41
KD080XP0	8.000	9.000	8.370	8.630	1.53
KD090XP0	9.000	10.000	9.370	9.630	1.72
KD100XP0	10.000	11.000	10.370	10.630	1.88
KD110XP0	11.000	12.000	11.370	11.630	2.06
KD120XP0	12.000	13.000	12.370	12.630	2.25
KD140XP0	14.000	15.000	14.370	14.630	2.73
KD160XP0	16.000	17.000	16.370	16.630	3.10
KD180XP0	18.000	19.000	18.370	18.630	3.48
KD200XP0	20.000	21.000	20.370	20.630	3.85
KD250XP0	25.000	26.000	25.370	25.630	4.79
KD300XP0	30.000	31.000	30.370	30.360	5.73

KF SERIES
Kaydon Bearing Number	Dimensions in Inches
					Weight
					in
					Pounds
	Bore	Outside Diameter	Land	Land
	Bore	Outside Diameter	Dia. L1	Dia. L2
KF040XP0	4.000	5.500	4.555	4.945	1.90
KF042XP0	4.250	5.750	4.805	5.195	2.00
KF045XP0	4.500	6.000	5.055	5.445	2.10
KF047XP0	4.750	6.250	5.305	5.695	2.20
KF050XP0	5.000	6.500	5.555	5.945	2.30
KF055XP0	5.500	7.000	6.055	6.445	2.50
KF060XP0	6.000	7.500	6.555	6.945	2.70
KF065XP0	6.500	8.000	7.055	7.445	2,9
KF070XP0	7.000	8.500	7.555	7.945	3.20
KF075XP0	7.500	9.000	8.055	8.445	3.40
KF080XP0	8.000	9.500	8.555	8.945	3.50
KF090XP0	9.000	10.500	9.555	9.945	3.90
KF100XP0	10.000	11.500	10.555	10.945	4.30
KF110XP0	11.000	12.500	11.555	11.945	4.80
KF120XP0	12.000	13.500	12.555	12.945	5.20
KF140XP0	14.000	15.500	14.555	14.945	6.00
KF160XP0	16.000	17.500	16.555	16.945	7.10
KF180XP0	18.000	19.500	18.555	18.945	7.90
KF200XP0	20.000	21.500	20.555	20.945	8.90
KF250XP0	25.000	26.500	25.555	25.945	10.90
KF300XP0	30.000	31.500	30.555	30.945	13.00
KF350XP0	35.000	36.500	35.555	35.945	15.10
KF400XP0	40.000	41.500	40.555	40.945	17.20

KG SERIES
Kaydon Bearing Number	Dimensions in Inches
					Weight
					in
					Pounds
	Bore	Outside Diameter	Land	Land
	Bore	Outside Diameter	Dia. L1	Dia. L2
KG040XP0	4.000	6.000	4.742	5.258	3.60
KG042XP0	4.250	6.250	4.992	5.508	3.80
KG045XP0	4.500	6.500	5.242	5.758	4.00
KG047XP0	4.750	6.750	5.492	6.008	4.10
KG050XP0	5.000	7.000	5.742	6.258	4.30
KG055XP0	5.500 0	7.500	6.242	6.758	4.70
KG060XP0	6.000	8.000	6.742	7.258	5.10
KG065XP0	6.500	8.500	7.242	7.758	5.40
KG070XP0	7.000	9.000	7.742	8.258	5.80
KG075XP0	7.500	9.500	8.242	8.758	6.10
KG080XP0	8.000	10.000	8.742	9.258	6.50
KG090XP0	9.000	11.000	9.742	10.258	7.20
KG100XP0	10.000	12.000	10.742	11.258	7.90
KG110XP0	11.000	13.000	11.742	12.258	8.60
KG120XP0	12.000	14.000	12.742	13.258	9.30
KG140XP0	14.000	16.000	14.742	15.258	10.80
KG160XP0	16.000	18.000	16.742	17.258	12.30
KG180XP0	18.000	20.000	18.742	19.258	13.70
KG200XP0	20.000	22.000	20.742	21.258	15.80
KG250XP0	25.000	27.000	25.742	26.258	19.50
KG300XP0	30.000	32.000	30.742	31.258	23.30
KG350XP0	35.000	37.000	35.742	36.258	27.10
KG400XP0	40.000	42.000	40.742	41.258	30.80

Application

Industrial Robots: Commonly used in the joint parts of robots, such as the waist, elbow, and wrist. They provide precise rotational movement for robots, meeting the requirements of rapid and accurate operation. At the same time, they reduce the weight of the robots, enhancing their movement flexibility and efficiency.

Medical Devices: For example, in the rotating frame of CT scanners and the joint parts of surgical robots. Their characteristics of high precision, low vibration, and low noise can meet the strict requirements of medical devices for precise movement and stable operation, ensuring the accuracy and safety of medical diagnosis and surgical operations.

Aerospace: It plays a role in aircraft aero-engines, onboard equipment, and various payload equipment of satellites. It helps to reduce the overall weight of the aircraft and, at the same time, meets the requirements of high reliability and long service life of bearings in the space environment.

Machine Tool Field: It can be applied to the spindle system of machine tools, bearing radial and axial loads during high-speed rotation, ensuring machining accuracy and surface quality, and improving the cutting efficiency and stability of machine tools.

Optoelectronic and Optical Instruments: Used in the focusing and zooming mechanisms of lenses in optical instruments such as astronomical telescopes and microscopes, as well as the rotating components of laser measurement equipment. It helps to ensure the precise alignment and stable operation of optical components, and improves the measurement accuracy and imaging quality of the instruments

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