SKF RNA4903 — Needle roller bearing (machined rings)
SKF · Bearings & Power Transmission · Needle Roller Bearings
SKF RNA4903 needle roller bearing (machined rings). Needle roller bearing with machined inner and outer rings (NA48xx, NA49xx, NA69xx, RNA48xx, RNA49xx, RNA69xx per ISO 3245 / DIN 617). Ideal for high radial load in the smallest possible radial section — universal-joint yokes, camshaft supports, transmission planetary pinions. Designation follows the SKF alphanumeric identification convention where the numeric block encodes the boundary plan and the suffix declares execution options (material, sealing, cage, precision, clearance, lubricant). Genuine SKF supply carries the SKF logo etch or moulded mark and hologram-authenticated packaging.
Specifications
- Part number
- RNA4903
- HS code
- 8482.40
- Material
- As declared by SKF designation suffix
- Temperature range
- Per SKF product data
- Standard
- SKF designation convention (see description for governing ISO / DIN)
Compatibility
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.
Also known as — OEM cross-references & superseded numbers
- INA 4903
- Torrington / Timken 4903
- IKO 4903
- NTN 4903
- Competitor equivalent: 4903 (INA)
- Competitor equivalent: 4903 (Torrington / Timken)
- Competitor equivalent: 4903 (IKO)
- Competitor equivalent: 4903 (NTN)
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