7315 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 7315 model number is decoded

7315 is SKF's single-row angular-contact ball bearing in the medium (7300) series of the 7xxx range: an asymmetric-raceway open bearing with a nominal 40° contact angle, listed as 7315 BEP in the SKF Rolling Bearings catalogue.Numbering ties the bearing to its envelope: 7315 means angular-contact type 7, medium section section 3, 75 mm bore — which is why the 160×37 mm outline swaps dimensionally with a 6315, though the load behaviour does not. In SKF suffix language B sets the steep 40° angle for high axial capacity, E is the optimised internal design, and P is the polymer cage; variants with seals (BE-2RZP), 25° angles (A/ACC) or brass cages (BECBM) are separate order numbers. Selection arithmetic: the C0/C ratio is about 0.78 (static 98 kN against dynamic 125 kN), typical of a 40° angle sized for axial capacity, and the 3.8 kN fatigue load limit Pu is the equivalent-load floor used in the SKF life calculation. For a 75 mm shaft the usual seat is k5 with an H7 housing when the inner ring rotates; arrange two 7315 bearings as a set for two-direction location and set preload from the load diagram, never from assembly feel.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 75 mm bore 7315 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 75 mm bore (160×37 mm) is heavier-rated than the 7215 but runs hotter at the same speed; do not substitute a 7315 into a 72-series spindle position without re-checking dn, lubricant film and preload.
• Preload is a design value, not an assembly feel: excessive preload in the 7315 pair raises operating temperature and can trigger thermal runaway back-to-back, while too little lets the balls skid and smear the raceway under light load.
• At the 125 kN rating of 7315, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 5,000 r/min speed end and heavier preload only where moment stiffness dominates.
• The 3200 g mass and 37 mm width mean locknut and spacer faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the contact angle and concentrates load on one shoulder of 7315.
• The 125/98 kN ratings are SKF catalogue 17000 values for the 7315 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 7315 (BEP basic, BECBP universally matchable, BE-2RZP sealed, BECBM brass-cage, ACC-series at 25°); they are not interchangeable order numbers — quote the full 7315 BEP designation when purchasing and match the execution to the mounting arrangement.
• A plain 7315 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.