SKF 51311 — Thrust ball bearing
SKF · Bearings & Power Transmission · Thrust Ball Bearings
SKF 51311 thrust ball bearing. Single-direction (51xxx) or double-direction (52xxx) thrust ball bearing designed to carry pure axial load at moderate speed. Cannot carry radial load. Series 511/512/513/514 covers the standard boundary plans. Manufactured to ISO 104 / ISO 492 Class Normal. Bore diameter d = 55 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. Boundary plan per ISO 15 / ISO 355: bore d = 55 mm, outside diameter D = 105 mm, width B (or height H) = 35 mm.
Specifications
- Part number
- 51311
- HS code
- 8482.10
- Material
- Bearing steel — 100Cr6 (through-hardened) or SNR-nitrided; cage as declared by suffix
- Dimensions
- 55 × 105 × 35 mm (bore d × OD D × width B / height H)
- 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Also known as — OEM cross-references & superseded numbers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 51311
- NSK 51311
- NTN 51311
- FAG 51311
- Koyo 51311
- Competitor equivalent: 51311 (Timken)
- Competitor equivalent: 51311 (NSK)
- Competitor equivalent: 51311 (NTN)
- Competitor equivalent: 51311 (FAG)
- Competitor equivalent: 51311 (Koyo)
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