53312 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 53312 model number is decoded

53312 is SKF's 60 mm-bore single-direction thrust ball bearing in the 53300 series to the ISO 104 dimension plan, with a sphered housing washer paired to a U seat washer, measuring 60×110×38.3 mm U 312 seat washer companion included in the mounted H1 dimension. The separable set comprises a shaft washer (ground bore, tight fit on the shaft), a loose-bore housing washer and one ball-cage assembly, reacting axial force in one direction and carrying no radial load. in the 53xxx designation the 3 marks a single-direction bearing whose housing washer has a sphered (convex) seating surface, intended to run against the matching U seat washer; the third digit 2–4 grades the section. the final two digits 12 encode the bore as 60 mm (code 12 × 5), the standard SKF bore-code rule shared with radial bearings. with no cage suffix this is the standard execution with a stamped sheet-steel ball-cage assembly (pressed cage) — the light, quiet and economical cage for small and medium thrust-ball sizes. Envelope 60×110×38.3 mm (2.362×4.331×1.508 in), 25.0 mm radial section, C 101 kN, C0 224 kN, Pu 8.3 kN. Mounted height H1 42 mm includes the U 312 seat washer; the bearing alone is 38.3 mm high. reference speed 2,000 r/min (thermal) and limiting speed 3,000 r/min (mechanical), catalogue mass 1700 g. Track-circle loading: per millimetre of mean track circumference the 101 kN dynamic rating corresponds to roughly 0.38 kN/mm of π·dm track, a useful comparison against the other dimension series of the 60 mm bore. Selection figures for 53312: the C0/C ratio is 2.22, Pu 8.3 kN is about 8 % of C, and the catalogue mass works out to roughly 28 g per millimetre of bore; the printed minimum-load factor is A 0.26. Imperial cross-check for procurement drawings: 2.362 in bore, 4.331 in OD, 1.508 in height, and the 1700 g catalogue mass converts to 1.700 kg (60.0 oz). Capacity density: 101 kN C from 1.700 kg of bearing steel gives about 59.4 kN per kilogram; static density is correspondingly 131.8 kN/kg at C0 224 kN. Rating split for documentation: dynamic 101 kN (L10 life), static 224 kN (safety factor s0), fatigue limit 8.3 kN (adjusted life) — three different uses of three different numbers for 53312, none interchangeable with another. Sphered-seating order-number note: the convex back face of the housing washer is finish-ground spherical and is delivered to mate with the separately ordered U seat washer, which presents a flat face to the housing and a concave face to the washer; together they accommodate initial static misalignment, but the pair must be kept clean, greased at the spherical interface and never replaced by a washer-on-flat-steel makeshift. Procurement reminder for this specific page: 53312 and U 312 are two order numbers shipping as two articles; the installed 42 mm H1 rather than 38.3 mm H is the dimension the housing drawing must carry.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Replacement orders must list both 53312 and U 312: the seat washer is a separate article, and a U washer of the wrong size narrows the contact band of the 224 kN static-rated set.
• Dimension the housing to the 42 mm mounted height H1 (bearing plus U 312), not the 38.3 mm bearing height H — confusing the two is a recurring drawing error for the 53-series.
• Keep the sphered interface clean and lightly greased: scale, paint or grit between the washer back and U 312 locks the aligning function and frets under load; re-grease the contact at every overhaul.
• The shaft washer remains the tight, ground-bore component on the 60 mm shaft; the sphered part is the HOUSING washer, and the U seat washer is the loose flat-backed part — the fitting order is shaft washer and cage set first, then housing washer and U 312 into the register.
• The 101/224 kN figures belong to 53312 specifically (the single sphered pressed steel execution of 53312); suffixed, sphered and counterpart-series order numbers are separate articles, and U 312 is ordered separately, so write the complete designation on the order and the maintenance record.