INA
Machined needle roller bearing
Needle Roller Bearing
RFQ
Estimated delivery: 26 Jul 2026 (overseas stock, ~4 weeks)
EX-WORKS (Incoterms 2020) Seoul, Korea — Buyer arranges freight, duties, and insurance.
INA RNA4903-RSR-XL Needle Roller Bearing is a compact bearing designed to carry high radial load within a small cross-section. It is suitable for gearboxes, automotive transmissions, industrial links, and pivot positions where space saving and load capacity are both required.
Long, small-diameter rollers are arranged in a cage or full-complement design. Versions with or without inner rings are available, and shaft hardness and surface finish are critical when the shaft is used as the raceway.
Check mounting envelope, inner ring requirement, shaft surface hardness, lubrication, load, and speed range.
| Symbol | Value | Description |
|---|---|---|
| ≈m | 0.02322 kg | Weight |
| Cr | 10.000 N | Basic dynamic load rating, radial |
| C0r | 11.000 N | Basic static load rating, radial |
| Cur | 2.220 N | Fatigue load limit, radial |
| nG | 12.000 1/min | Limiting speed |
| Symbol | Value | Description |
|---|---|---|
| d | 22 mm | Bore diameter |
| D | 30 mm | Outside diameter |
| B | 13 mm | Width |
| r1, 2 min | 0,3 mm | Minimum chamfer dimension |
| Symbol | Value | Description |
|---|---|---|
| Tmin | -20 °C | Operating temperature min. |
| Tmax | 100 °C | Operating temperature max. |
| Code | Description |
|---|---|
| Standard | Cage |
| Tolerance class P0/PN2 / ABEC 1 | Tolerance class |
The same part number can be written with or without separators, or in progressive prefix form. We index these common variants so your search reaches this page:
RNA4903RSRXLRNA4903 RSR XLRNA4903RSR XLRNA4903 RSRXLRNA4903RNA4903RSRINARNA4903RSRXLINA RNA4903 RSR XLINARNA4903 RSR XLINARNA4903RSR XLINA RNA4903RSRXLINA RNA4903 RSRXLRFQ
Estimated delivery: 26 Jul 2026 (overseas stock, ~4 weeks)
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