Alignment needle roller bearings are self-aligning and offer a compact solution in applications where less space is available. Owing to their large number of rollers, they have a high load carrying capacity. Their internal design, where a convex outer ring meets two concave seating rings encased in a drawn sleeve, enables the bearings to accommodate initial static misalignment. Bearings without an inner ring are an excellent choice for compact bearing arrangements, if the shaft can be hardened and ground.
- High radial load carrying capacity
- Accommodate static initial misalignment
- Low cross-sectional height
- Suitable for compact bearing arrangements
Alignment Needle Roller Bearings without an Inner Ring
| ID | OD | Width | RPM | Limit Speed | Model | Variation |
|---|---|---|---|---|---|---|
| 15 | 28 | 12 | 24,000 | 28,000 | RPNA 15/28 | |
| 18 | 32 | 16 | 22,000 | 24,000 | RPNA 18/32 | |
| 20 | 35 | 16 | 19,000 | 22,000 | RPNA 20/35 | |
| 25 | 42 | 20 | 16,000 | 18,000 | RPNA 25/42 | |
| 28 | 44 | 20 | 14,000 | 16,000 | RPNA 28/44 | |
| 30 | 47 | 20 | 13,000 | 15,000 | RPNA 30/47 | |
| 35 | 52 | 20 | 11,000 | 13,000 | RPNA 35/52 | |
| 40 | 55 | 20 | 10,000 | 11,000 | RPNA 40/55 | |
| 45 | 62 | 20 | 9,000 | 10,000 | RPNA 45/62 |