52314 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 52314 model number is decoded

Listed in SKF 17000 chapter 5, 52314 is an ISO 104 double-direction thrust ball bearing, 55 mm bore and 125 mm OD on a flat housing seat, standing 72 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 52314 is 55 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 55×125×72 mm (2.165×4.921×2.835 in), 35.0 mm radial section, C 135 kN, C0 320 kN, Pu 11.8 kN. reference speed 1,400 r/min (thermal) and limiting speed 2,000 r/min (mechanical), catalogue mass 3650 g. Static-first selection data: 320 kN C0 spread across the 72 mm stack gives 4.4 kN of static rating per height millimetre, and the 3650 g mass/C0 ratio is about 11 g per static kN — crane-hook and screw positions are normally sized on these two figures. Envelope economics: the 72 mm axial height over a 35.0 mm radial section yields 1.9 kN of dynamic capacity per height millimetre, and the bearing weighs 3650 g for 135 kN C — about 27 g per rated kN. Washer-annulus check: the π/4·(D²−d²) contact annulus of 52314 covers about 9,896 mm², distributing C0 320 kN over a mean track circle of π·dm ≈ 283 mm. Minimum-load arithmetic: with dm ≈ 90.0 mm and factor A 0.53, Fam ≈ A·(n·dm/1000)² at the 1,400 r/min reference speed is about 8.4 kN for 52314; below that preload the balls skid and smear the tracks. Imperial cross-check for procurement drawings: 2.165 in bore, 4.921 in OD, 2.835 in height, and the 3650 g catalogue mass converts to 3.650 kg (128.7 oz). 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 55 mm bore and 72 mm overall height the unit drops into one recess where a mirrored single-direction pair would need two seats; both loose 125 mm housing washers must remain free to slide during thermal movement.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Service both cage sets together: replacing only the noisy side while leaving the worn 320 kN opposite track in place reproduces the failure within weeks — inspect both shaft-washer faces and both loose washers at removal.
• Observe the stack order at fitting: shaft washer central, the two housing washers facing outwards with a cage set on each side; the 72 mm total height is not twice a single-direction bearing height, so reuse of old cover dimensions is a trap.
• Where shaft and housing cannot be kept square, the sphered 54-series execution of the same bore with two U seat washers is the self-aligning counterpart; the flat 52300 unit has no alignment capacity.
• Do not replace a 52314 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 55×125 mm bore and OD.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 52314 as the double flat pressed steel execution; other order numbers of the 52314 size are different products and may carry different ratings or seating geometry — always quote the full designation when purchasing.