7307-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 7307-ACCBM model number is decoded

7307 ACCBM is SKF's 35 mm-bore single-row angular-contact ball bearing in the 7300 series, nominal 25° (AC) contact angle, 35×80×21 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 35×80×21 mm (1.378×3.15×0.827 in), 22.5 mm radial section height, C 46.5 kN, C0 30 kN, Pu 1.27 kN.reference speed 11,000 r/min (thermal) and limiting speed 17,000 r/min (mechanical), catalogue mass 450 g. Selection figures for 7307 ACCBM: the static-to-dynamic ratio C0/C is 0.65, Pu 1.27 kN is about 3 % of C, and catalogue mass works out to roughly 13 g per millimetre of bore. At the printed limiting speed of 17,000 r/min the mean pitch diameter dm ≈ 57.5 mm implies a dn value around 978k mm·r/min; the 11,000 r/min reference speed is the thermal-planning figure under catalogue load. Bore-to-OD planning: OD 80 over bore 35 is a 2.29× step for this size, and the 21 mm width gives a bore/width ratio of 1.67; use these ratios when housing space around the 35 mm shaft is the first constraint. 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

• DB pairs give the highest moment stiffness, DF pairs tolerate misalignment and thermal expansion better, DT shares heavy one-direction thrust; choose from the shaft thermal calculation rather than by habit.
• Preload the set against a calculated stand-off dimension — the ground faces of ACCBM establish it, but locknut torque, sleeve crush and housing-face squareness each consume part of the allowance.
• 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.
• Greased positions should fill roughly 25–35 % of the free volume on a 7307-ACCBM of this section and route the surplus past the outer ring; overpacking churns the grease and reproduces the thermal preload problem mechanically.
• The 25° AC angle of 7307-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.