SKF 39581/39520 — Tapered roller bearing
SKF · Bearings & Power Transmission · Tapered Roller Bearings
SKF 39581/39520 tapered roller bearing. Single-row tapered roller bearing designed to take combined heavy radial and one-direction axial load. Rollers, inner ring raceway (cone) and outer ring raceway (cup) are ground to converge at a common apex on the bearing axis. Two bearings are always mounted in opposition so the pair carries axial load in both directions and can be preloaded to remove all internal clearance. Metric dimensions per ISO 355 / ISO 492 Class Normal. Bore diameter d = 100 mm per ISO 15. Designation follows the ISO 15 / DIN 623 alphanumeric convention where the numeric block encodes the dimension series and bore code; suffixes after the numeric block declare cage, closure, precision, clearance and lubricant execution. Genuine SKF supply carries the SKF logo etch on the outer ring face and hologram-authenticated packaging.
Specifications
- Part number
- 39581/39520
- HS code
- 8482.20
- Material
- Bearing steel — 100Cr6 (through-hardened) or SNR-nitrided; cage as declared by suffix
- Dimensions
- bore d = 100 mm
- Temperature range
- -30 to +120 °C standard grease
- Standard
- ISO 15 / ISO 492 / DIN 623
Compatibility
ISO 15 boundary-plan interchange — the numeric bore-code block is portable across every ISO 15 bearing manufacturer (SKF, Timken, NSK, NTN, FAG, Koyo, NACHI). Confirm suffix compatibility on cage, seal, clearance and precision class before substitution.
Standards
Also known as — OEM cross-references & superseded numbers
- Timken 3958139520
- NSK 3958139520
- NTN 3958139520
- FAG 3958139520
- Koyo 3958139520
- Competitor equivalent: 3958139520 (Timken)
- Competitor equivalent: 3958139520 (NSK)
- Competitor equivalent: 3958139520 (NTN)
- Competitor equivalent: 3958139520 (FAG)
- Competitor equivalent: 3958139520 (Koyo)
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