7305-ACCBM bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-27

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 7305-ACCBM model number is decoded

7305 ACCBM is SKF's 25 mm-bore single-row angular-contact ball bearing in the 7300 series, nominal 25° (AC) contact angle, 25×62×17 mm to the ISO dimension plan. AC sets the 25° contact angle, CB marks universal matching with Normal axial clearance, and M the machined brass ball-centred cage. CB means universally matchable with Normal axial internal clearance: the two side faces are ground so any two units form DB (back-to-back), DF (face-to-face) or DT (tandem) sets without regrinding. CB means universally matchable with Normal axial internal clearance: the two side faces are ground so any two units form DB (back-to-back), DF (face-to-face) or DT (tandem) sets without regrinding. Envelope 25×62×17 mm (0.984×2.441×0.669 in), 18.5 mm radial section height, C 29 kN, C0 17 kN, Pu 0.72 kN.reference speed 15,000 r/min (thermal) and limiting speed 22,000 r/min (mechanical), catalogue mass 230 g. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 22,000 r/min while thermal balance under catalogue load sets the 15,000 r/min reference; at dm ≈ 43.5 mm the corresponding dn is approximately 957k mm·r/min. Selection figures for 7305 ACCBM: the static-to-dynamic ratio C0/C is 0.59, Pu 0.72 kN is about 2 % of C, and catalogue mass works out to roughly 9 g per millimetre of bore. Speed-ratio note for this exact unit: the reference speed is 15,000 r/min against a 22,000 r/min limiting speed, i.e. a reference-to-limit ratio of 0.68. High-angle alternative note: ACCBM carries the 25-degree AC contact angle (not the 40-degree B), CB Normal-clearance universal faces and a machined brass cage; it runs faster and cooler than a BECBM of the same envelope but accepts a smaller axial share, so substitute only after re-running the load-ratio check.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Reference and limiting speeds are different ceilings: design to both, and remember preload and oil/air cooling move the real thermal limit far from the catalogue reference value.
• Reference and limiting speeds are different ceilings: design to both, and remember preload and oil/air cooling move the real thermal limit far from the catalogue reference value.
• Mount by induction-heating the inner ring to max 120 °C; driving the bearing home through the outer ring or balls brinells the asymmetric raceway.
• One 7305-ACCBM locates the shaft in one axial direction only; reversing-thrust positions need a DB or DF pair — or a double-row bearing — with preload set from the load diagram, never from assembly feel.
• The 25° AC angle of 7305-ACCBM runs faster and cooler than a 40° B bearing of the same envelope, but its thrust capacity and induced-load behaviour differ — do not swap AC for B without re-running the axial-load calculation.
• Universally matchable ACCBM bearings arrive ready for set mounting, not preloaded sets: preload results from how the set is clamped, so follow the SKF stand-off-ring and nut-torque procedure.