51407-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 51407-SKF model number is decoded

The 51400 series order number 51407 is a SKF single-direction thrust ball bearing for a 35 mm seat, built to ISO 104, with a flat housing seating surface, 35×80×32 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 07 decodes to 35 mm (code 07 × 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 35×80×32 mm (1.378×3.15×1.26 in), 22.5 mm radial section, C 76.1 kN, C0 137 kN, Pu 5.1 kN. reference speed 2,600 r/min (thermal) and limiting speed 3,600 r/min (mechanical), catalogue mass 790 g. Speed band width for this size is 1,000 r/min between reference and limiting (1.38× ratio); lubrication, preload and heat removal decide where inside that band 51407 can actually run. Track-circle loading: per millimetre of mean track circumference the 76.1 kN dynamic rating corresponds to roughly 0.42 kN/mm of π·dm track, a useful comparison against the other dimension series of the 35 mm bore. Capacity density: 76.1 kN C from 0.790 kg of bearing steel gives about 96.3 kN per kilogram; static density is correspondingly 173.4 kN/kg at C0 137 kN. Section proportions: the 22.5 mm radial section compares with 35 mm of bore (section/bore ≈ 0.64) and the 32 mm height is 1.42× that section — the proportions that identify the 51400 envelope at a glance. Envelope economics: the 32 mm axial height over a 22.5 mm radial section yields 2.4 kN of dynamic capacity per height millimetre, and the bearing weighs 790 g for 76.1 kN C — about 10 g per rated kN. 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 32 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 76.1 kN C.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The three components are separable and interchangeable within the ISO 104 size, but keep this bearing's parts together in service and never combine washers from different manufacturers or a worn washer with a new ball set.
• The 51407 is a pure axial bearing: it must never be subjected to radial load — any radial force on the 35 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 0.15; for 51407 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.
• A 51-series bearing reacts thrust in one direction only — reversing positions need a mirrored single-direction pair or a 52-series double-direction unit; fitting a single 51407 against two-way load lifts the loose washer off its raceway.
• The 76.1/137 kN figures belong to 51407 specifically (the single flat pressed steel execution of 51407); suffixed, sphered and counterpart-series order numbers are separate articles, so write the complete designation on the order and the maintenance record.