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Thrust Ball Bearing Spec Table
Thrust Ball Bearing Specifications — 21 sizes
KS B 2001ISO 104JIS B 1532
A bearing exclusively for axial (thrust) loads, used in vertical shafts, hydraulic cylinders, and rotary tables.
Practical Notes
- Supports pure axial loads only. Even small radial loads damage the raceway.
- Not suitable for high speed. Centrifugal force can push balls out of the raceway — check speed limits.
Selection Guide
Exclusively supports axial (thrust) loads — cannot handle radial loads. Used in screw jacks, vertical shafts, and rotary tables. Not suitable for high-speed rotation; consider angular contact bearings for high speed.
KSISOJISThrust Ball Bearing
7 sizesThe dimensions below are identical across KS B 2001 · ISO 104 · JIS B 1532.
| Nominal | d (Bore) | D (OD) | B (Width) | Cr | rpm |
|---|---|---|---|---|---|
| 51100 | 10 | 24 | 9 | 8060N | 11000 |
| 51102 | 15 | 28 | 9 | 8450N | 9000 |
| 51104 | 20 | 35 | 10 | 12500N | 7500 |
| 51105 | 25 | 42 | 11 | 16400N | 6300 |
| 51106 | 30 | 47 | 11 | 17800N | 5600 |
| 51108 | 40 | 60 | 13 | 27000N | 4500 |
| 51110 | 50 | 70 | 14 | 29100N | 3800 |
Key Features
- Exclusively supports axial (thrust) loads; cannot handle radial loads
- Series 51100–51400; composed of housing washer, shaft washer, and ball cage
- Low-speed operation only; high speed risks ball orbit deviation from centrifugal force
Key Applications
Machine tool screw jacks, vertical shaft load support, rotary tables, crane hook swivel, hydraulic press ball seats
FAQ
What happens if radial load is applied to thrust bearings?
Raceway damage occurs. Thrust bearings are for pure axial loads only. For combined loads, use angular contact or tapered roller bearings.