7306-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 7306-ACCBM model number is decoded

7306 ACCBM is SKF's 30 mm-bore single-row angular-contact ball bearing in the 7300 series, nominal 25° (AC) contact angle, 30×72×19 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 30×72×19 mm (1.181×2.835×0.748 in), 21.0 mm radial section height, C 39 kN, C0 23.6 kN, Pu 1 kN.reference speed 13,000 r/min (thermal) and limiting speed 19,000 r/min (mechanical), catalogue mass 340 g. The 1 kN fatigue load limit is the equivalent-load floor for long-life adjustment; with 39/23.6 kN ratings and 340 g mass this execution carries about 1.30 kN of C per millimetre of bore. Load balance: C0 23.6 kN against C 39 kN gives a 0.61 ratio, typical of a steep-angle axial-oriented design; Pu 1 kN enters the SKF adjusted-life equation rather than the basic rating life. Bore-to-OD planning: OD 72 over bore 30 is a 2.40× step for this size, and the 19 mm width gives a bore/width ratio of 1.58; use these ratios when housing space around the 30 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

• Greased positions should fill roughly 25–35 % of the free volume on a 7306-ACCBM of this section and route the surplus past the outer ring; overpacking churns the grease and reproduces the thermal preload problem mechanically.
• 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.
• Do not mix execution classes inside one set: a universally matchable ACCBM unit is ground for arbitrary pairing, a basic execution is not.
• 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.
• The 25° AC angle of 7306-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.