7312 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 3.1 single-row ACBB) · extracted 2026-09-26

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 3.1 single-row ACBB); 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 7312 model number is decoded

For a 60 mm shaft carrying combined load, SKF lists 7312 under catalogue execution 7312 BEP: one open single-row angular-contact ball bearing, 40° contact angle, in the medium (7300) series of the 7xxx family.The code breaks down as type prefix 7 (angular contact), diameter series 3 (the medium section), and bore code 12 = 60 mm; dimensions 60×130×31 mm therefore match the 6312 deep-groove envelope even though the internal design is different. Here B marks the steep 40° contact angle (the highest-capacity single-row angle), E the modernised internal geometry and P the glass-fibre nylon cage; the same bare size in a 25° A-angle or brass M-cage execution carries a different suffix. Speed planning uses two different ceilings: 6,300 r/min reference (thermal, under representative load) and 6,000 r/min limiting (mechanical cage/ball limit). Note the minimum-axial-load requirement: at light radial load and high speed the balls of 7312 must still be held into the contact ellipse, which is another reason the catalogue recommends paired mounting with controlled preload on 60 mm shaft positions.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 60 mm bore 7312 by induction heating of the inner ring (max 120 °C — the PA66 cage sets the ceiling, not the steel); driving it home through the outer ring or balls brinells the asymmetric raceway.
• The 73xx medium section at 60 mm bore (130×31 mm) is heavier-rated than the 7212 but runs hotter at the same speed; do not substitute a 7312 into a 72-series spindle position without re-checking dn, lubricant film and preload.
• Do not mix execution classes inside one 7312 pair — universal-matchable (CB) bearings are ground for arbitrary pairing, but a CB unit paired with an unmatched basic BEP bearing will not share preload evenly.
• The 40° contact angle creates an induced axial load under pure radial force; include it in the 7312 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its balls.
• The 7312 shares its ISO 15 envelope with deep-groove 6312 but is not a drop-in replacement: it cannot run effectively under pure radial load without a minimum axial load, and a deep-groove bearing cannot replace its combined-load duty.
• The 95.6/69.5 kN ratings are SKF catalogue 17000 values for the 7312 BEP execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
• SKF lists several executions of 7312 (BEP basic, BECBP universally matchable, BE-2RZP sealed, BECBM brass-cage, ACC-series at 25°); they are not interchangeable order numbers — quote the full 7312 BEP designation when purchasing and match the execution to the mounting arrangement.
• A plain 7312 BEP is a single open bearing, not a universally matchable one; to mount a defined DB/DF pair order the BECBP (CB) execution — pairing two unmatched basic units gives uncontrolled preload because the side faces are not ground for set mounting.