52315 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 52315 model number is decoded

The 52300 series order number 52315 is a SKF double-direction thrust ball bearing for a 60 mm seat, built to ISO 104, with a flat housing seating surface, 60×135×79 mm boundary dimensions. Inside the unit sit a single central shaft washer with a ground interference bore, two outward-facing loose housing washers and two independent ball-cage assemblies, so axial force is reacted in both directions from one housing recess. bore-coding caveat: on 52/54 double-direction bearings the last two digits are an order-number code, not ×5 millimetres — this size carries a 60 mm bore per the ISO 104 table, and guessing from the code gives the wrong shaft. 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 60×135×79 mm (2.362×5.315×3.11 in), 37.5 mm radial section, C 163 kN, C0 390 kN, Pu 14 kN. reference speed 1,300 r/min (thermal) and limiting speed 1,800 r/min (mechanical), catalogue mass 4800 g. Minimum-load arithmetic: with dm ≈ 97.5 mm and factor A 0.79, Fam ≈ A·(n·dm/1000)² at the 1,300 r/min reference speed is about 12.7 kN for 52315; below that preload the balls skid and smear the tracks. Rating split for documentation: dynamic 163 kN (L10 life), static 390 kN (safety factor s0), fatigue limit 14 kN (adjusted life) — three different uses of three different numbers for 52315, none interchangeable with another. Track-circle loading: per millimetre of mean track circumference the 163 kN dynamic rating corresponds to roughly 0.53 kN/mm of π·dm track, a useful comparison against the other dimension series of the 60 mm bore. Section proportions: the 37.5 mm radial section compares with 60 mm of bore (section/bore ≈ 0.63) and the 79 mm height is 2.11× that section — the proportions that identify the 52300 envelope at a glance. 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 52315 can actually run. Double-direction order-number note: the unit is built around one central shaft washer with a ground bore and tracks on both faces, flanked by two housing washers and two independent ball-cage assemblies; observe the assembly orientation (the two housing washers face outwards) and note that a 52-series unit replaces a mirrored pair of 51-series bearings only after the stack height and seat drawings are re-checked. At 60 mm bore and 79 mm overall height the unit drops into one recess where a mirrored single-direction pair would need two seats; both loose 135 mm housing washers must remain free to slide during thermal movement.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Each direction independently needs the minimum axial load (factor A 0.79): the side that is momentarily unloaded during slow reversal skids first, so arrange preload or symmetry rather than assuming the loaded side drives the idle side.
• The central shaft washer takes the interference fit on the 60 mm shaft while both outer housing washers run loose in their registers; both loose washers need positive axial retention on vertical shafts.
• Do not replace a 52315 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 60×135 mm bore and OD.
• Observe the stack order at fitting: shaft washer central, the two housing washers facing outwards with a cage set on each side; the 79 mm total height is not twice a single-direction bearing height, so reuse of old cover dimensions is a trap.
• The 163/390 kN figures belong to 52315 specifically (the double flat pressed steel execution of 52315); suffixed, sphered and counterpart-series order numbers are separate articles, so write the complete designation on the order and the maintenance record.