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Four-point Contact Structure KA-XP0 Series Open Thin Section Bearings Carry Lightweight Multi Directional Load
The KA-XP0 series bearings are uniform cross-section bearings with a cross-section of 6.35*6.35mm. They are four-point contact open-type sealless bearings with a single row of steel balls. A single bearing can simultaneously bear radial load, bidirectional axial load, and overturning moment combined load. It is commonly used in industrial robot joints, precision rotary tables, semiconductor equipment and other fields.
Maximum radius of chamfer on shaft or bearing housing
KA025XP0 Thin Section Bearing
d
63.5 mm / 2.5 in
aperture
D
76.2 mm / 3 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 68.224 mm / 2.686 in
Inner ring flange diameter
D1
≈ 71.476 mm / 2.814 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA027XP0 Thin Section Bearing
d
69.85 mm / 2.75 in
aperture
D
82.55 mm / 3.25 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 74.574 mm / 2.936 in
Inner ring flange diameter
D1
≈ 77.826 mm / 3.064 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA030XP0 Thin Section Bearing
d
76.2 mm / 3 in
aperture
D
88.9 mm / 3.5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 80.924 mm / 3.186 in
Inner ring flange diameter
D1
≈ 84.176 mm / 3.314 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA035XP0 Thin Section Bearing
d
88.9 mm / 3.5 in
aperture
D
101.6 mm / 4 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 93.624 mm / 3.686 in
Inner ring flange diameter
D1
≈ 96.876 mm / 3.814 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA040XP0 Thin Section Bearing
d
101.6 mm / 4 in
aperture
D
114.3 mm / 4.5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 106.324 mm / 4.186 in
Inner ring flange diameter
D1
≈ 109.576 mm / 4.314 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA042XP0 Thin Section Bearing
d
107.95 mm / 4.25 in
aperture
D
120.65 mm / 4.75 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 112.674 mm / 4.436 in
Inner ring flange diameter
D1
≈ 115.926 mm / 4.564 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA045XP0
KA047XP0
KA050XP0
KA055XP0
KA060XP0
KA065XP0
KA070XP0
KA045XP0 Thin Section Bearing
d
114.3 mm / 4.5 in
aperture
D
127 mm / 5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 119.024 mm / 4.686 in
Inner ring flange diameter
D1
≈ 122.276 mm / 4.814 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA047XP0 Thin Section Bearing
d
120.65 mm / 4.75 in
aperture
D
133.35 mm / 5.25 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 125.374 mm / 4.936 in
Inner ring flange diameter
D1
≈ 128.626 mm / 5.064 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA050XP0 Thin Section Bearing
d
127 mm / 5 in
aperture
D
139.7 mm / 5.5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 131.724 mm / 5.186 in
Inner ring flange diameter
D1
≈ 134.976 mm / 5.314 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA055XP0 Thin Section Bearing
d
139.7 mm / 5.5 in
aperture
D
152.4 mm / 6 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 144.424 mm / 5.686 in
Inner ring flange diameter
D1
≈ 147.676 mm / 5.814 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA060XP0 Thin Section Bearing
d
152.4 mm / 6 in
aperture
D
165.1 mm / 6.5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm /0.25 in
width
d1
≈ 157.124 mm / 6.186 in
Inner ring flange diameter
D1
≈ 160.376 mm / 6.314 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA065XP0 Thin Section Bearing
d
165.1 mm / 6.5 in
aperture
D
177.8 mm / 7 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 169.824 mm / 6.686 in
Inner ring flange diameter
D1
≈ 173.076 mm / 6.814 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA070XP0 Thin Section Bearing
d
177.8 mm / 7 in
aperture
D
190.5 mm / 7.5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 182.524 mm / 7.186 in
Inner ring flange diameter
D1
≈ 185.776 mm / 7.314 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA075XP0
KA080XP0
KA090XP0
KA100XP0
KA110XP0
KA120XP0
KA075XP0 Thin Section Bearing
d
190.5 mm / 7.5 in
aperture
D
203.2 mm / 8 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 195.224 mm / 7.686 in
Inner ring flange diameter
D1
≈ 198.476 mm / 7.814 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA080XP0 Thin Section Bearing
d
203.2 mm / 8 in
aperture
D
215.9 mm / 8.5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 207.924 mm / 8.186 in
Inner ring flange diameter
D1
≈ 211.176 mm / 8.314 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA090XP0 Thin Section Bearing
d
228.6 mm / 9 in
aperture
D
241.3 mm / 9.5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 233.324 mm / 9.186 in
Inner ring flange diameter
D1
≈ 236.576 mm / 9.314 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA100XP0 Thin Section Bearing
d
254 mm / 10 in
aperture
D
266.7 mm / 10.5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 258.724 mm / 10.186 in
Inner ring flange diameter
D1
≈ 261.976 mm / 10.314 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA110XP0 Thin Section Bearing
d
279.4 mm / 11 in
aperture
D
292.1 mm / 11.5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 284.124 mm / 11.186 in
Inner ring flange diameter
D1
≈ 287.376 mm / 11.314 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
KA120XP0 Thin Section Bearing
d
304.8 mm / 12 in
aperture
D
317.5 mm / 12.5 in
outer diameter
B
6.35 mm / 0.25 in
radial cross section
H
6.35 mm / 0.25 in
width
d1
≈ 309.524 mm / 12.186 in
Inner ring flange diameter
D1
≈ 312.776 mm / 12.314 in
Outer ring flange diameter
3.175 mm / 0.125 in
sphere diameter
0.635 mm / 0.025 in
Maximum radius of chamfer on shaft or bearing housing
Thin Section Bearings are extra thin section bearings, with square cross-sections for both inner and outer rings, and the cross-sectional dimensions are consistent. The whole is composed of an inner ring, an outer ring, rolling elements, and a retaining structure. Based on the raceway form, there are three types of structures: deep groove ball, angular contact, and four-point contact, most of which are open designs. Cages are used to separate and hold rolling elements in place. The angular contact structure has a fixed contact angle and can withstand radial and unidirectional axial loads; the four-point contact structure can withstand bidirectional axial loads. The bearings have uniform wall thickness, compact shape, small installation space, and are suitable for various precision automated equipment.
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.
We can provide you with Super Precision Hybrid Ball Bearings & 440C Stainless steel Bearings. Please feel free to contact us if you have any questions!
TKW is a China bearing manufacturer with extensive experience in bearing 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.
