51107-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 51107-SKF model number is decoded

The 51100 series order number 51107 is a SKF single-direction thrust ball bearing for a 35 mm seat, built to ISO 104, with a flat housing seating surface, 35×52×12 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 35×52×12 mm (1.378×2.047×0.472 in), 8.5 mm radial section, C 19.9 kN, C0 51 kN, Pu 1.86 kN. reference speed 5,600 r/min (thermal) and limiting speed 7,500 r/min (mechanical), catalogue mass 80 g. Load balance: C0 51 kN against C 19.9 kN gives a 2.56 ratio — thrust ball bearings are chosen on static rating and F_a/C0 far more often than on L10 life, while Pu 1.86 kN enters the adjusted-life check. Sizing arithmetic on the 35 mm bore: 19.9 kN C over the 8.5 mm radial section gives 2.3 kN per section millimetre, and the 12 mm stack height is 1.41× that section — proportions typical of a 51100 thrust section. Washer-annulus check: the π/4·(D²−d²) contact annulus of 51107 covers about 1,162 mm², distributing C0 51 kN over a mean track circle of π·dm ≈ 137 mm. Rating split for documentation: dynamic 19.9 kN (L10 life), static 51 kN (safety factor s0), fatigue limit 1.86 kN (adjusted life) — three different uses of three different numbers for 51107, none interchangeable with another. Imperial cross-check for procurement drawings: 1.378 in bore, 2.047 in OD, 0.472 in height, and the 80 g catalogue mass converts to 0.080 kg (2.8 oz). 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. On this 35 mm size the pressed cage and separable washers make the bearing interchangeable across brands on the ISO 104 plan, but the SKF ratings 19.9/51 kN are this catalogue's figures — confirm the replacement order's ratings rather than swapping on envelope alone.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Heat the shaft washer to at most 120 °C for mounting, or press it via a sleeve on its ground bore — force applied through the housing washer or the ball set brinells the 19.9 kN track before first rotation.
• Identify the washers before fitting: the shaft washer has the ground, smaller bore and takes an interference fit on the 35 mm shaft, while the housing washer bore is larger and runs loose; swapping them locks the ball set and burns the tracks.
• When the housing seat cannot be machined square to the 35 mm shaft, the sphered 53-series execution of this size with its U seat washer is the self-aligning counterpart of this flat 51100 bearing.
• The third digit grades the section: 511 light, then 512, 513 and 514 progressively taller and heavier at the same bore — select from 19.9/51 kN and the available 52 mm OD, never substitute a lighter series for a heavier one without rechecking C and C0.
• The 19.9/51 kN figures belong to 51107 specifically (the single flat pressed steel execution of 51107); suffixed, sphered and counterpart-series order numbers are separate articles, so write the complete designation on the order and the maintenance record.