7301 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 7301 model number is decoded

7301 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 7301 BEP in the SKF Rolling Bearings catalogue.Digit by digit, 7301 reads as bearing type 7 (single-row angular contact), medium section diameter series 3, and bore reference 01 resolving to 12 mm (codes 00-03 use the 10/12/15/17 mm exception table); 37 mm OD and 12 width are the matching ISO 15 boundary values. 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. The 0.208 kN Pu figure feeds the SKF adjusted-life equation at contaminated or partial-film conditions, and the 0.47 C0/C balance shows this execution is tuned to thrust-heavy combined loads rather than pure radial running. Note the minimum-axial-load requirement: at light radial load and high speed the balls of 7301 must still be held into the contact ellipse, which is another reason the catalogue recommends paired mounting with controlled preload on 12 mm shaft positions.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At a 12 mm bore the thin rings are easily distorted by an over-tight shaft nut; check seat runout (target Ra ≤ 0.8 µm) and torque the locknut progressively — a pinched 7301 shows up as spindle vibration long before it fails.
• The 73xx medium section at 12 mm bore (37×12 mm) is heavier-rated than the 7201 but runs hotter at the same speed; do not substitute a 7301 into a 72-series spindle position without re-checking dn, lubricant film and preload.
• A single 7301 cannot locate the shaft axially in both directions; mounting it singly on a reversing-thrust shaft leaves one direction uncontrolled — always use a DB or DF matched pair for bidirectional location.
• Do not mix execution classes inside one 7301 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.
• 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 37 mm race release as noise within the first running hours.
• The 10.6/5 kN ratings are SKF catalogue 17000 values for the 7301 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 7301 (BEP basic, BECBP universally matchable, BE-2RZP sealed, BECBM brass-cage, ACC-series at 25°); they are not interchangeable order numbers — quote the full 7301 BEP designation when purchasing and match the execution to the mounting arrangement.
• A plain 7301 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.