53415-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 53415-M model number is decoded

The 53400 series order number 53415 M is a SKF single-direction thrust ball bearing for a 75 mm seat, built to ISO 104, with a sphered housing washer paired to a U seat washer, 75×160×69 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. the 3 in 53xxx replaces the flat-seat 1: it still denotes one load direction, but the housing washer is sphered for pairing with a U seat washer, and the following digit 2–4 ranks the section. bore code 15 decodes to 75 mm (code 15 × 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 75×160×69 mm (2.953×6.299×2.717 in), 42.5 mm radial section, C 251 kN, C0 610 kN, Pu 20.8 kN. Mounted height H1 75 mm includes the U 415 seat washer; the bearing alone is 69 mm high. reference speed 1,300 r/min (thermal) and limiting speed 1,800 r/min (mechanical), catalogue mass 8100 g. Mass and section check: 8100 g inside the 75×160×69 mm outline leaves a 42.5 mm radial section, and the 610 kN static rating is 2.43× the dynamic rating — plan static safety and minimum preload against those figures. Speed planning separates the two ceilings mechanically: the pressed brass cage and balls tolerate 1,800 r/min while thermal balance under catalogue load sets the 1,300 r/min reference; at dm ≈ 117.5 mm the corresponding dn is approximately 212k mm·r/min. Minimum-load arithmetic: with dm ≈ 117.5 mm and factor A 1.9, Fam ≈ A·(n·dm/1000)² at the 1,300 r/min reference speed is about 44.3 kN for 53415 M; below that preload the balls skid and smear the tracks. Speed band width for this size is 500 r/min between reference and limiting (1.38× ratio); lubrication, preload and heat removal decide where inside that band 53415 M can actually run. Envelope economics: the 69 mm axial height over a 42.5 mm radial section yields 3.6 kN of dynamic capacity per height millimetre, and the bearing weighs 8100 g for 251 kN C — about 32 g per rated kN. Heavy sphered-execution note: this M order number combines the machined brass ball-centred cage with the sphered housing washer and its U seat washer; it is the large-bore answer for hook blocks and pivots whose fabricated structure deflects — verify the spherical pair swivels freely under a light preload before the working load goes on. The M brass-cage option at 75 mm bore pairs the heavy-section cage with the U 415 seat requirement — order all three articles (bearing + U washer + appropriate lubricant) together, and log the H1 75 mm installed dimension on the maintenance card.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Dimension the housing to the 75 mm mounted height H1 (bearing plus U 415), not the 69 mm bearing height H — confusing the two is a recurring drawing error for the 53-series.
• The sphered housing washer of 53415 M MUST run against the U 415 seat washer, a separate order number; mounted bare on a flat register, the convex back makes point contact that gouges the housing under load.
• Minimum axial load still applies with factor A 1.9: a self-aligning seat does not prevent ball skidding, so provide spring preload or sufficient rotor weight at light load and speed.
• The self-aligning feature is checked at commissioning by hand: with the shaft under no load the assembly must swivel and settle; a stiff spherical seat means dirt, a mismatched U washer, or a register bored off-axis.
• The 251/610 kN figures belong to 53415 M specifically (the single sphered brass execution of 53415); suffixed, sphered and counterpart-series order numbers are separate articles, and U 415 is ordered separately, so write the complete designation on the order and the maintenance record.