Koyo 7000 Angular Contact Ball Bearing, 30° Contact Angle, 10 x 26 x 8 mm
Available
This Koyo single row angular contact ball bearing (70 series, 30° contact angle) is designed to carry combined radial and axial load, with the axial load in one direction only. It suits applications that need high accuracy and good high-speed performance. The 30° contact angle is the standard angle, identified by no suffix after the bearing number.
The range has 16 sizes, with bores from 10 to 100 mm, boundary dimensions to JIS B 1512 and tolerances to JIS B 1514-1. Koyo bearings are made by JTEKT Corporation.
Where this product is used
- Machine tool spindles
- High frequency motors
- Gas turbines and centrifugal separators
- Front wheels of small size automobiles
- Differential pinion shafts
Features
- Accommodates radial load and axial load in one direction only
- 30° nominal contact angle (with no angle suffix). A larger contact angle gives higher axial load resistance and a smaller one suits high-speed rotation
- Boundary dimensions to JIS B 1512, tolerances to JIS B 1514-1
- Standard cage: copper alloy machined cage (supplementary code FY)
- Basic dynamic load ratings 5 to 68.4 kN and static 2.35 to 70.6 kN depending on size (machined cage)
- Allowable misalignment 0.000 6 rad (2 minutes of arc)
Key specifications
| Specification | Detail |
|---|---|
| Bearing type | Single row angular contact ball bearing |
| Series | 70 series |
| Contact angle (nominal) | 30° |
| Bore diameter d | 10 to 100 mm |
| Outside diameter D | 26 to 150 mm |
| Width B | 8 to 24 mm |
| Basic dynamic load rating Cr (machined cage) | 5 to 68.4 kN |
| Basic static load rating C0r (machined cage) | 2.35 to 70.6 kN |
| Limiting speed, grease lubrication (machined cage) | 4,700 to 34,000 min-1 |
| Limiting speed, oil lubrication (machined cage) | 5,900 to 42,000 min-1 |
| Cage note | Machined cage only for this series |
| Mass | 0.021 to 1.37 kg |
| Standard cage | Copper alloy machined cage (supplementary code FY) |
| Allowable misalignment | 0.000 6 rad (2 minutes of arc) |
| Dimensions and tolerances | JIS B 1512 (boundary dimensions), JIS B 1514-1 (tolerances) |
| Brand | Koyo (JTEKT) |
Available sizes
Show all 16 sizes
| Designation | Bore d (mm) | Outer D (mm) | Width B (mm) | r min (mm) | r1 min (mm) | Cr (kN) | C0r (kN) | Speed, grease (min-1) | Speed, oil (min-1) | Mass (kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| 7000 | 10 | 26 | 8 | 0.3 | 0.15 | 5 | 2.35 | 34,000 | 42,000 | 0.021 |
| 7001 | 12 | 28 | 8 | 0.3 | 0.15 | 5.4 | 2.75 | 29,000 | 37,000 | 0.024 |
| 7002 | 15 | 32 | 9 | 0.3 | 0.15 | 6.1 | 3.45 | 26,000 | 32,000 | 0.035 |
| 7004 | 20 | 42 | 12 | 0.6 | 0.3 | 10.3 | 6.1 | 19,000 | 24,000 | 0.079 |
| 7005 | 25 | 47 | 12 | 0.6 | 0.3 | 11.3 | 7.4 | 17,000 | 21,000 | 0.091 |
| 7006 | 30 | 55 | 13 | 1 | 0.6 | 14.5 | 10.1 | 14,000 | 18,000 | 0.133 |
| 7007 | 35 | 62 | 14 | 1 | 0.6 | 17.5 | 12.6 | 12,000 | 15,000 | 0.17 |
| 7008 | 40 | 68 | 15 | 1 | 0.6 | 18.7 | 14.6 | 11,000 | 14,000 | 0.21 |
| 7009 | 45 | 75 | 16 | 1 | 0.6 | 22.2 | 17.7 | 10,000 | 12,000 | 0.26 |
| 7010 | 50 | 80 | 16 | 1 | 0.6 | 23.6 | 20.1 | 9,200 | 11,000 | 0.29 |
| 7011 | 55 | 90 | 18 | 1.1 | 0.6 | 31.1 | 26.3 | 8,300 | 10,000 | 0.42 |
| 7012 | 60 | 95 | 18 | 1.1 | 0.6 | 31.9 | 28.1 | 7,700 | 9,700 | 0.45 |
| 7013 | 65 | 100 | 18 | 1.1 | 0.6 | 33.7 | 31.4 | 7,200 | 9,000 | 0.47 |
| 7014 | 70 | 110 | 20 | 1.1 | 0.6 | 42.7 | 39.4 | 6,600 | 8,300 | 0.66 |
| 7018 | 90 | 140 | 24 | 1.5 | 1 | 65.2 | 63.3 | 5,100 | 6,400 | 1.26 |
| 7020 | 100 | 150 | 24 | 1.5 | 1 | 68.4 | 70.6 | 4,700 | 5,900 | 1.37 |
Selecting the right option
Select by bore d first, then check the outside diameter D and width B in the table against your housing.
The ratings and limiting speeds in the table are the Koyo catalogue figures for the machined cage type. This series is listed with a machined cage only.
When a single row bearing is loaded radially, an axial component of force is produced. Use two bearings facing one another, or match two or more bearings, so that the axial load is accommodated.
Static equivalent radial load for a single row bearing is P0r = 0.5 Fr + 0.33 Fa. When P0r is less than Fr, use P0r = Fr.
Angular contact bearings are often preloaded to improve rigidity and running performance. Under too small a load, slip can occur between the balls and raceways and cause smearing.
Fitting and use
Check the mounting dimensions in the variant specification: the shaft shoulder diameter da, housing shoulder diameter Da and fillet radius ra give the shoulder sizes and radius limits for the mating parts.
Allowable misalignment of a single row bearing is small, 0.000 6 rad (2 minutes of arc), so align the shaft and housing carefully.
Related products
Also available from Koyo: the 72B and 73B series range.
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10 x 26 x 8mm bearing
Model Number: 7000/KOYO
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12 x 28 x 8mm bearing
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