51413-M 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 51413-M model number is decoded

The 51400 series order number 51413 M is a SKF single-direction thrust ball bearing for a 65 mm seat, built to ISO 104, with a flat housing seating surface, 65×140×56 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 13 decodes to 65 mm (code 13 × 5) under the same 00/01/02/03-exception, ×5 rule SKF uses across its coded bearing ranges. the trailing M names a solid machined brass window cage centred on the balls rather than on a washer, the catalogue choice when size, speed or interrupted lubrication rules out sheet steel. Envelope 65×140×56 mm (2.559×5.512×2.205 in), 37.5 mm radial section, C 216 kN, C0 490 kN, Pu 18 kN. reference speed 1,500 r/min (thermal) and limiting speed 2,200 r/min (mechanical), catalogue mass 4000 g. Mass and section check: 4000 g inside the 65×140×56 mm outline leaves a 37.5 mm radial section, and the 490 kN static rating is 2.27× the dynamic rating — plan static safety and minimum preload against those figures. Stack/annulus proportions: the 56 mm axial stack over the 12,075 mm² washer annulus gives 4.64 mm of height per annular square millimetre ×10⁻³, and at 4000 g the bearing holds about 122.5 kN of C0 per kilogram. Section proportions: the 37.5 mm radial section compares with 65 mm of bore (section/bore ≈ 0.58) and the 56 mm height is 1.49× that section — the proportions that identify the 51400 envelope at a glance. Sizing arithmetic on the 65 mm bore: 216 kN C over the 37.5 mm radial section gives 5.8 kN per section millimetre, and the 56 mm stack height is 1.49× that section — proportions typical of a 51400 thrust section. Rating split for documentation: dynamic 216 kN (L10 life), static 490 kN (safety factor s0), fatigue limit 18 kN (adjusted life) — three different uses of three different numbers for 51413 M, none interchangeable with another. Machined-cage order-number note: the M brass cage is a one-piece ball-centred window cage, chosen at the heavy end of the section for speed and shock duty; it is heavier and stiffer than the pressed-steel execution of the smaller sizes and tolerates interrupted lubrication far better, which is why the catalogue restricts the M suffix to the large bores. The M cage of 51413 M adds a small amount of mass and cage strength without changing the 65×140×56 mm ISO 104 envelope, so the pressed-cage execution drops into the same recess but should not be assumed equal under the 2,200 r/min ceiling.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The 51413 M is a pure axial bearing: it must never be subjected to radial load — any radial force on the 65 mm shaft has to be carried by a radial bearing mounted alongside it.
• The third digit grades the section: 511 light, then 512, 513 and 514 progressively taller and heavier at the same bore — select from 216/490 kN and the available 140 mm OD, never substitute a lighter series for a heavier one without rechecking C and C0.
• When the housing seat cannot be machined square to the 65 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 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.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 51413 M as the single flat brass execution; other order numbers of the 51413 size are different products and may carry different ratings or seating geometry — always quote the full designation when purchasing.