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IKO RNA4912UU Machined Needle Roller Bearing 68x85x25mm (Without Inner Ring)
IKO RNA4912UU machined-type needle roller bearing, without inner ring. Bore 68mm, OD 85mm, width 25mm. High radial load capacity.
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- High running accuracy and rigidity for demanding industrial drives
- IKO (Nippon Thompson) precision manufacture to JIS standards
- Machined-type needle roller bearing - thick, rigid machined and ground outer ring
- Supplied without an inner ring - runs on a hardened, ground shaft or a separate inner ring
- Very high radial load and shock capacity in a compact cross section
| Brand | IKO |
|---|---|
| Bearing Type | Machined Needle Roller Bearing |
| Series | RNA |
| Measurement System | Metric |
| Inner Diameter (Bore) | 68 mm |
| Outer Diameter | 85 mm |
| Width | 25 mm |
| Configuration | Without Inner Ring |
| Material | Chrome Bearing Steel |
| Dynamic Load Rating (Cr) | 54500 N (54.5 kN) |
| Static Load Rating (C₀) | 92800 N (92.8 kN) |
| Limiting Speed (Grease) | 1800 rpm |
| Limiting Speed (Oil) | 3000 rpm |
| Weight | 0.285 kg |
| Features & Benefits | High running accuracy and rigidity for demanding industrial drives IKO (Nippon Thompson) precision manufacture to JIS standards Machined-type needle roller bearing - thick, rigid machined and ground outer ring Supplied without an inner ring - runs on a hardened, ground shaft or a separate inner ring Very high radial load and shock capacity in a compact cross section |
The IKO RNA4912UU is a machined-type needle roller bearing without an inner ring (runs on a hardened, ground shaft or a separate inner ring), for a 68mm shaft (metric series). Machined and ground from solid bearing steel, it has a thick, rigid outer ring that carries very high radial loads and shock in a compact section. Boundary dimensions 68 x 85 x 25mm.
Where no inner ring is used, the shaft must be hardened and ground to serve as the raceway. Suitable for high radial loads in gearboxes, pumps, and industrial machinery. Manufactured by IKO (Nippon Thompson), Japan.
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