7306-BEGAPH 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-BEGAPH model number is decoded

7306 BEGAPH is SKF's 30 mm-bore single-row angular-contact ball bearing in the 7300 series, nominal 40° (B) contact angle, 30×72×19 mm to the ISO dimension plan. 40° contact angle (suffix B): the steep standard single-row angle, giving the highest axial capacity at the cost of speed, with a recommended load ratio Fa/Fr ≥ 1. E marks the optimized internal design with an enhanced ball complement and race geometry. glass-fibre reinforced PEEK cage, ball-centred (suffix PH), keeping the polymer-cage speed advantage well above the PA66 temperature range. GA marks universal matching with light factory preload for back-to-back or face-to-face sets — stiffer than CB clearance while generating less heat than GB/GC. BEGAPH combines light-preload (GA) universal matching with a PEEK ball-centred cage. Envelope 30×72×19 mm (1.181×2.835×0.748 in), 21.0 mm radial section height, C 35.5 kN, C0 21.2 kN, Pu 0.9 kN.reference speed 12,000 r/min (thermal) and limiting speed 13,000 r/min (mechanical), catalogue mass 340 g. Envelope economics: the 19 mm width over a 21.0 mm section yields 0.90 mm of ring width per section millimetre, and the bearing weighs 340 g for 35.5 kN of dynamic capacity — about 10 g per rated kN. Selection figures for 7306 BEGAPH: the static-to-dynamic ratio C0/C is 0.60, Pu 0.9 kN is about 3 % of C, and catalogue mass works out to roughly 11 g per millimetre of bore. Speed-ratio note for this exact unit: the reference speed is 12,000 r/min against a 13,000 r/min limiting speed, i.e. a reference-to-limit ratio of 0.92. Preload and cage note: BEGAPH arrives as a universally matchable unit with GA light preload already defined for back-to-back or face-to-face sets, combined with the glass-fibre PEEK ball-centred cage for high-speed duty; it replaces field preload adjustment, not the need for correct stand-off geometry.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Preload the set against a calculated stand-off dimension — the ground faces of BEGAPH establish it, but locknut torque, sleeve crush and housing-face squareness each consume part of the allowance.
• At 30 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.
• Keep the load ratio in the SKF design range: Fa/Fr ≥ 1 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.
• Mount by induction-heating the inner ring to max 120 °C — the PA66 cage sets the ceiling, not the steel; driving the bearing home through the outer ring or balls brinells the asymmetric raceway.
• The steep 40° angle of 7306-BEGAPH favours thrust-heavy combined loads; for a predominantly radial high-speed position the 25° ACCBM execution of the same size is the alternative order number.
• Universally matchable BEGAPH 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.