52407 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 52407 model number is decoded

Listed in SKF 17000 chapter 5, 52407 is an ISO 104 double-direction thrust ball bearing, 25 mm bore and 80 mm OD on a flat housing seat, standing 59 mm high before installation. Construction is a five-component stack: one central shaft washer with tracks on both faces, two outward-facing housing washers and two cage sets, which lets one housing recess accept thrust from either direction. note the bore of 52407 is 25 mm by the dimension table: the double-direction series was deliberately aligned to the 51/53 washer sets with shifted codes, so the familiar 04=20 arithmetic does not apply here. no cage suffix means the standard stamped steel retainer — a pressed sheet-metal ball-cage assembly that covers the bulk of the thrust-ball assortment. Envelope 25×80×59 mm (0.984×3.15×2.323 in), 27.5 mm radial section, C 76.1 kN, C0 137 kN, Pu 5.1 kN. reference speed 2,000 r/min (thermal) and limiting speed 2,800 r/min (mechanical), catalogue mass 1450 g. At the printed limiting speed of 2,800 r/min the mean pitch diameter dm ≈ 52.5 mm implies a dn value around 147k mm·r/min; the 2,000 r/min reference speed is the thermal-planning value under catalogue load. Light-load floor: Pu = 5.1 kN is the equivalent-load threshold below which the SKF adjusted-life equation credits very long life for 52407; the number is 7 % of the 76.1 kN dynamic rating. Load balance: C0 137 kN against C 76.1 kN gives a 1.80 ratio — thrust ball bearings are chosen on static rating and F_a/C0 far more often than on L10 life, while Pu 5.1 kN enters the adjusted-life check. Rating split for documentation: dynamic 76.1 kN (L10 life), static 137 kN (safety factor s0), fatigue limit 5.1 kN (adjusted life) — three different uses of three different numbers for 52407, none interchangeable with another. Minimum-load arithmetic: with dm ≈ 52.5 mm and factor A 0.15, Fam ≈ A·(n·dm/1000)² at the 2,000 r/min reference speed is about 1.7 kN for 52407; below that preload the balls skid and smear the tracks. 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. Life accounting for 52407 is done separately per direction: if duty applies 76.1 kN C predominantly one way, the idle side's skid risk — not the loaded side's L10 — usually sets the relubrication and preload interval.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Do not replace a 52407 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 25×80 mm bore and OD.
• Torque the cover to leave the catalogue axial freedom, never solid: a clamped double-direction stack cannot float to its thermal position, and at 2,800 r/min even a small thermal thrust preload smears the hottest track.
• The central shaft washer takes the interference fit on the 25 mm shaft while both outer housing washers run loose in their registers; both loose washers need positive axial retention on vertical shafts.
• Each direction independently needs the minimum axial load (factor A 0.15): 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.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 52407 as the double flat pressed steel execution; other order numbers of the 52407 size are different products and may carry different ratings or seating geometry — always quote the full designation when purchasing.