7310-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 7310-ACCBM model number is decoded

7310 ACCBM is SKF's 50 mm-bore single-row angular-contact ball bearing in the 7300 series, nominal 25° (AC) contact angle, 50×110×27 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 50×110×27 mm (1.969×4.331×1.063 in), 30.0 mm radial section height, C 83 kN, C0 57 kN, Pu 2.4 kN.reference speed 8,000 r/min (thermal) and limiting speed 12,000 r/min (mechanical), catalogue mass 1100 g. Envelope economics: the 27 mm width over a 30.0 mm section yields 0.90 mm of ring width per section millimetre, and the bearing weighs 1100 g for 83 kN of dynamic capacity — about 13 g per rated kN. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 12,000 r/min while thermal balance under catalogue load sets the 8,000 r/min reference; at dm ≈ 80.0 mm the corresponding dn is approximately 960k mm·r/min. Speed-ratio note for this exact unit: the reference speed is 8,000 r/min against a 12,000 r/min limiting speed, i.e. a reference-to-limit ratio of 0.67. 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

• Do not mix execution classes inside one set: a universally matchable ACCBM unit is ground for arbitrary pairing, a basic execution is not.
• At 50 mm bore the k5 seat assumes a steel shaft and housing; aluminium housings grow faster with temperature, so re-check the outer-ring setting when the case is non-ferrous.
• 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.
• Keep the load ratio in the SKF design range: Fa/Fr ≥ 0,55 for this angle; below it the balls unload the contact ellipse and skid, which is why the catalogue insists on a minimum axial load (Fam ≈ A·(n·dm/1000)²) at high speed.
• The 25° AC angle of 7310-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.