7208-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 7208-ACCBM model number is decoded

7208 ACCBM is SKF's 40 mm-bore single-row angular-contact ball bearing in the 7200 series, nominal 25° (AC) contact angle, 40×80×18 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 40×80×18 mm (1.575×3.15×0.709 in), 20.0 mm radial section height, C 41.5 kN, C0 29 kN, Pu 1.25 kN.reference speed 11,000 r/min (thermal) and limiting speed 16,000 r/min (mechanical), catalogue mass 370 g. At the printed limiting speed of 16,000 r/min the mean pitch diameter dm ≈ 60.0 mm implies a dn value around 960k mm·r/min; the 11,000 r/min reference speed is the thermal-planning figure under catalogue load. Envelope economics: the 18 mm width over a 20.0 mm section yields 0.90 mm of ring width per section millimetre, and the bearing weighs 370 g for 41.5 kN of dynamic capacity — about 9 g per rated kN. Speed-ratio note for this exact unit: the reference speed is 11,000 r/min against a 16,000 r/min limiting speed, i.e. a reference-to-limit ratio of 0.69. 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

• Assign interference to the rotating ring — roughly k5 on a 40 mm rotating shaft with an H7 housing — and let the stationary ring slide for axial setting; reverse the logic if the outer ring rotates.
• 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.
• Fillet radii must clear the chamfer so the 18 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
• The 25° AC angle of 7208-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.