7340-BCBM 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

No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.

How the 7340-BCBM model number is decoded

7340 BCBM is SKF's 200 mm-bore single-row angular-contact ball bearing in the 7300 series, nominal 40° (B) contact angle, 200×420×80 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. machined brass cage, ball-centred (suffix M), the choice for high speed, marginal lubrication and shock duty. 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 200×420×80 mm (7.874×16.535×3.15 in), 110.0 mm radial section height, C 462 kN, C0 655 kN, Pu 15.6 kN.reference speed 1,900 r/min (thermal) and limiting speed 2,200 r/min (mechanical), catalogue mass 53000 g. Selection figures for 7340 BCBM: the static-to-dynamic ratio C0/C is 1.42, Pu 15.6 kN is about 3 % of C, and catalogue mass works out to roughly 265 g per millimetre of bore. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 2,200 r/min while thermal balance under catalogue load sets the 1,900 r/min reference; at dm ≈ 310.0 mm the corresponding dn is approximately 682k mm·r/min. Speed-ratio note for this exact unit: the reference speed is 1,900 r/min against a 2,200 r/min limiting speed, i.e. a reference-to-limit ratio of 0.86. Non-optimized universal execution: BCBM keeps the earlier internal geometry (no E) with CB Normal-clearance set mounting and a machined brass ball-centred cage; it is stocked for positions built around its established ratings rather than the enhanced E ball complement.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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.
• One 7340-BCBM locates the shaft in one axial direction only; reversing-thrust positions need a DB or DF pair — or a double-row bearing — with preload set from the load diagram, never from assembly feel.
• Greased positions should fill roughly 25–35 % of the free volume on a 7340-BCBM of this section and route the surplus past the outer ring; overpacking churns the grease and reproduces the thermal preload problem mechanically.
• One 7340-BCBM locates the shaft in one axial direction only; reversing-thrust positions need a DB or DF pair — or a double-row bearing — with preload set from the load diagram, never from assembly feel.
• The steep 40° angle of 7340-BCBM 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 BCBM 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.