The KB-XP0 series bearings are single-row four-point contact ball bearings with a fixed cross-sectional dimension of 7.938mm*7.938mm. A single bearing can simultaneously withstand radial loads, bidirectional axial loads, and overturning moments. It can be made of 440C stainless steel. It is mainly used in robot joints, optoelectronic gimbals, precision rotary tables and other scenarios.
Maximum radius of chamfer on shaft or bearing housing
KB025CP0 Thin Section Bearing
d
63.5 mm / 2.5 in
aperture
D
79.375 mm / 3.125 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 69.38 mm / 2.7315 in
Inner ring flange diameter
D1
≈ 73.495 mm / 2.8935 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB030CP0 Thin Section Bearing
d
76.2 mm / 3 in
aperture
D
92.075 mm / 3.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 82.08 mm / 3.2315 in
Inner ring flange diameter
D1
≈ 86.195 mm / 3.3935 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB035CP0 Thin Section Bearing
d
88.9 mm / 3.5 in
aperture
D
104.775 mm / 4.125 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 94.767 mm / 3.731 in
Inner ring flange diameter
D1
≈ 98.895 mm / 3.8935 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB040CP0 Thin Section Bearing
d
101.6 mm / 4 in
aperture
D
117.475 mm / 4.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 107.467 mm / 4.231 in
Inner ring flange diameter
D1
≈ 111.595 mm / 4.3935 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB042CP0 Thin Section Bearing
d
107.95 mm / 4.25 in
aperture
D
123.825 mm / 4.875 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 113.817 mm / 4.481 in
Inner ring flange diameter
D1
≈ 117.932 mm / 4.643 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB045CP0 Thin Section Bearing
d
114.3 mm / 4.5 in
aperture
D
130.175 mm / 5.125 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 120.167 mm / 4.731 in
Inner ring flange diameter
D1
≈ 124.295 mm / 4.8935 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB047CP0 Thin Section Bearing
d
120.65 mm / 4.75 in
aperture
D
136.525 mm / 5.375 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 126.517 mm / 4.981 in
Inner ring flange diameter
D1
≈ 130.632 mm / 5.143 in
Outer ring flange diameter
3.969 mm /0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB050XP0
KB055XP0
KB060XP0
KB065XP0
KB070XP0
KB075XP0
KB080XP0
KB090XP0
KB050CP0 Thin Section Bearing
d
127 mm / 5 in
aperture
D
142.875 mm / 5.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 132.867 mm / 5.231 in
Inner ring flange diameter
D1
≈ 136.982 mm / 5.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB055CP0 Thin Section Bearing
d
139.7 mm / 5.5 in
aperture
D
155.575 mm / 6.125 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 145.567 mm / 0.5731 in
Inner ring flange diameter
D1
≈ 149.682 mm /5.893 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB060CP0 Thin Section Bearing
d
152.4 mm / 6 in
aperture
D
168.275 mm / 6.625 in
outer diameter
H
7.938 mm / 0.3125 in
radial cross section
B
7.938 mm / 0.3125 in
width
d1
≈ 158.28 mm / 6.2315 in
Inner ring flange diameter
D1
≈ 162.395 mm / 6.3935 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB065CP0 Thin Section Bearing
d
165.1 mm / 6.5 in
aperture
D
180.975 mm / 7.125 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm /0.3125 in
width
d1
≈ 170.967 mm / 6.731 in
Inner ring flange diameter
D1
≈ 175.082 mm /6.893 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB070CP0 Thin Section Bearing
d
177.8 mm / 7 in
aperture
D
193.675 mm / 7.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 183.667 mm / 7.231 in
Inner ring flange diameter
D1
≈ 187.782 mm / 7.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB075CP0 Thin Section Bearing
d
190.5 mm / 7.5 in
aperture
D
206.375 mm / 8.125 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 196.367 mm / 7.731 in
Inner ring flange diameter
D1
≈ 200.482 mm / 7.893 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB080CP0 Thin Section Bearing
d
203.2 mm / 8 in
aperture
D
219.075 mm / 8.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 209.067 mm / 8.231 in
Inner ring flange diameter
D1
≈ 213.182 mm / 8.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB090CP0 Thin Section Bearing
d
228.6 mm / 9 in
aperture
D
244.475 mm / 9.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 234.467 mm / 9.231 in
Inner ring flange diameter
D1
≈ 238.582 mm / 9.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB100XP0
KB110XP0
KB120XP0
KB140XP0
KB160XP0
KB180XP0
KB200XP0
KB100CP0 Thin Section Bearing
d
254 mm / 10 in
aperture
D
269.875 mm / 10.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 259.867 mm / 10.231 in
Inner ring flange diameter
D1
≈ 263.982 mm / 10.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB110CP0 Thin Section Bearing
d
279.4 mm / 11 in
aperture
D
295.275 mm / 11.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 285.267 mm / 11.231 in
Inner ring flange diameter
D1
≈ 289.382 mm / 11.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB120CP0 Thin Section Bearing
d
304.8 mm / 12 in
aperture
D
320.675 mm / 12.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 310.667 mm / 12.231 in
Inner ring flange diameter
D1
≈ 314.782 mm / 12.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB140CP0 Thin Section Bearing
d
355.6 mm / 14 in
aperture
D
371.475 mm / 14.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 361.467 mm / 14.231 in
Inner ring flange diameter
D1
≈ 365.582 mm / 14.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB160CP0 Thin Section Bearing
d
406.4 mm / 16 in
aperture
D
422.275 mm / 16.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 412.267 mm / 16.231 in
Inner ring flange diameter
D1
≈ 416.382 mm / 16.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB180CP0 Thin Section Bearing
d
457.2 mm / 18 in
aperture
D
473.075 mm / 18.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 463.067 mm / 18.231 in
Inner ring flange diameter
D1
≈ 467.182 mm / 18.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
KB200CP0 Thin Section Bearing
d
508 mm / 20 in
aperture
D
523.875 mm / 20.625 in
outer diameter
B
7.938 mm / 0.3125 in
radial cross section
H
7.938 mm / 0.3125 in
width
d1
≈ 513.867 mm / 20.231 in
Inner ring flange diameter
D1
≈ 517.982 mm / 20.393 in
Outer ring flange diameter
3.969 mm / 0.1563 in
sphere diameter
1.016 mm / 0.04 in
Maximum radius of chamfer on shaft or bearing housing
First，the mainstream material of thin section bearing rings and steel balls is GCr15 bearing steel, which has high hardness and excellent wear resistance after heat treatment. Corrosion usage scenarios are made of 440C stainless steel, which has strong anti-rust ability and can meet the needs of humid and medium-containing working environments. The material selection of rolling elements and rings should be consistent to ensure that the materials of friction pairs are uniform. Cages are divided into two categories: brass and engineering plastics. The brass material is wear-resistant and not easy to deform, while the plastic material is light in weight and has low operating noise. The thermal expansion coefficients of all supporting materials are compatible with each other and adapt to the thin-walled structure of the bearing to ensure stable operation of the bearing.
Second, The mainstream precision grades for Thin Section Bearings are P4 and P5. The inner diameter, outer diameter, and width tolerances of P5 grade bearings are within the normal range, and the raceway form and position deviations, radial and axial run-outs meet general usage requirements. P4 grade is a high-precision specification with narrower dimensional tolerances, higher raceway geometric accuracy, and significantly reduced radial and axial run-out. The two grades of parameters are clearly defined, and all accuracy indicators are implemented in accordance with the specifications, ensuring a high degree of uniformity in the accuracy performance of bearings of the same grade.
We can provide you with Super Precision Thin Section Bearings. Please feel free to contact us if you have any questions!
TKW is a China bearing manufacturer with extensive experience in bearings research and development and manufacturing. Its production base is located in Guantao County, Handan City, Hebei Province. The factory can mass-produce a variety of precision bearings, including bearings for servo motors, thin-walled bearings with equal cross-sections, vacuum pump bearings, and low-temperature bearings. The company has established a mature and complete end-to-end system encompassing production, precision testing, finished product packaging, and logistics delivery. Its products meet export standards and are supplied to overseas markets such as Europe, America, and South Korea on a long-term basis.
