7313 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 7313 model number is decoded

SKF 7313 (7313 BEP) is the medium (7300) series angular-contact choice for a 65 mm shaft — one row of balls on a steepened, asymmetric raceway giving a nominal 40° contact angle inside the 140×33 mm ISO 15 envelope.Reading the designation: the leading 7 marks a single-row angular-contact ball bearing, the 3 is ISO diameter series 3 (medium section), and the last two digits encode the 65 mm bore; the 140 mm OD and 33 mm width follow the ISO 15 general plan. Suffix letters after 7313 describe the build: B fixes the 40° contact angle, E denotes the reinforced internal geometry, and P identifies the moulded PA66 glass-fibre cage rather than a stamped-steel or machined-brass one. With C 108 kN and C0 80 kN, the 7313 pair-sizing check is dominated by the axial share: keep the equivalent load P below the rating at the required L10, remembering one bearing alone cannot cover reversing thrust at 5,600 r/min. Specify pairs rather than single units wherever thrust reverses: the 40° angle of 7313 generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack in one direction and fret its seat.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 65 mm bore 7313 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 65 mm bore (140×33 mm) is heavier-rated than the 7213 but runs hotter at the same speed; do not substitute a 7313 into a 72-series spindle position without re-checking dn, lubricant film and preload.
• DB (back-to-back) pairs are stiffer against moments, DF (face-to-face) pairs tolerate misalignment and thermal growth better; choosing the arrangement from the 2D drawing rather than the actual shaft thermal expansion is a common 7313 mounting error.
• Preload is a design value, not an assembly feel: excessive preload in the 7313 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.
• Never press both rings through the wrong element during fitting: force for an interference shaft seat goes through the inner ring only, or brinell marks on the 140 mm race release as noise within the first running hours.
• The 108/80 kN ratings are SKF catalogue 17000 values for the 7313 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 7313 (BEP basic, BECBP universally matchable, BE-2RZP sealed, BECBM brass-cage, ACC-series at 25°); they are not interchangeable order numbers — quote the full 7313 BEP designation when purchasing and match the execution to the mounting arrangement.
• A plain 7313 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.