51410-SKF bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-28

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.

Cross references & equivalents

Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.

How the 51410-SKF model number is decoded

The 51400 series order number 51410 is a SKF single-direction thrust ball bearing for a 50 mm seat, built to ISO 104, with a flat housing seating surface, 50×110×43 mm boundary dimensions. Three separable parts make the set: the tight-bore shaft washer that locates on the shaft, the loose-bore housing washer in its register, and the ball-cage assembly; load is purely axial and acts in one direction. reading 51xxx as a code: the 1 after 5 identifies one load direction and a flat seat, and the next digit ranks the section 1 (light) to 4 (heavy) before the two-digit bore code. bore code 10 decodes to 50 mm (code 10 × 5) under the same 00/01/02/03-exception, ×5 rule SKF uses across its coded bearing ranges. the suffix-free listing carries the catalogue default: a pressed (stamped sheet-steel) ball-cage assembly, light and quiet, used across the small and medium sizes. Envelope 50×110×43 mm (1.969×4.331×1.693 in), 30.0 mm radial section, C 159 kN, C0 340 kN, Pu 12.5 kN. reference speed 2,000 r/min (thermal) and limiting speed 2,800 r/min (mechanical), catalogue mass 2000 g. Light-load floor: Pu = 12.5 kN is the equivalent-load threshold below which the SKF adjusted-life equation credits very long life for 51410; the number is 8 % of the 159 kN dynamic rating. Bore-to-OD planning: OD 110 over bore 50 is a 2.20× step for this size, and the 43 mm height gives a bore/height ratio of 1.16; use these ratios when the housing recess around the 50 mm shaft is the first constraint. Speed band width for this size is 800 r/min between reference and limiting (1.40× ratio); lubrication, preload and heat removal decide where inside that band 51410 can actually run. Rating split for documentation: dynamic 159 kN (L10 life), static 340 kN (safety factor s0), fatigue limit 12.5 kN (adjusted life) — three different uses of three different numbers for 51410, none interchangeable with another. At the printed limiting speed of 2,800 r/min the mean pitch diameter dm ≈ 80.0 mm implies a dn value around 224k mm·r/min; the 2,000 r/min reference speed is the thermal-planning value under catalogue load. Execution note for this order number: the flat housing seating surface must be machined square to the shaft axis and supported across the full washer face — unlike the sphered 53-series execution this pressed-cage 51-series bearing has no self-aligning capability at all, so seat squareness is checked at mounting, not compensated in service. Inspection after removal of a 43 mm-high stack means checking both washer faces: the loose housing washer often shows the first false-brinell marks under machine vibration even though the tight shaft washer carries the rotating load of 159 kN C.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Identify the washers before fitting: the shaft washer has the ground, smaller bore and takes an interference fit on the 50 mm shaft, while the housing washer bore is larger and runs loose; swapping them locks the ball set and burns the tracks.
• The 51410 is a pure axial bearing: it must never be subjected to radial load — any radial force on the 50 mm shaft has to be carried by a radial bearing mounted alongside it.
• Keep the applied thrust above Fam ≈ A·(n·dm/1000)² with the printed factor A 0.6; for 51410 a spring preload or the rotor weight is part of the selection at light load and high speed, because unloaded balls skid rather than roll.
• When the housing seat cannot be machined square to the 50 mm shaft, the sphered 53-series execution of this size with its U seat washer is the self-aligning counterpart of this flat 51400 bearing.
• The 159/340 kN figures belong to 51410 specifically (the single flat pressed steel execution of 51410); suffixed, sphered and counterpart-series order numbers are separate articles, so write the complete designation on the order and the maintenance record.