7052-BGM 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 7052-BGM model number is decoded

7052 BGM is SKF's 260 mm-bore single-row angular-contact ball bearing in the 7000 series, nominal 40° (B) contact angle, 260×400×65 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. G marks a universally matchable bearing delivered with axial internal clearance (rather than factory preload), the starting point for field-set preload in a DB/DF set. Envelope 260×400×65 mm (10.236×15.748×2.559 in), 70.0 mm radial section height, C 332 kN, C0 510 kN, Pu 11.8 kN.reference speed 1,700 r/min (thermal) and limiting speed 1,700 r/min (mechanical), which coincide for this size, catalogue mass 30000 g. Selection figures for 7052 BGM: the static-to-dynamic ratio C0/C is 1.54, Pu 11.8 kN is about 4 % of C, and catalogue mass works out to roughly 115 g per millimetre of bore. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 1,700 r/min while thermal balance under catalogue load sets the 1,700 r/min reference; at dm ≈ 330.0 mm the corresponding dn is approximately 561k mm·r/min. Bore-to-OD planning: OD 400 over bore 260 is a 1.54× step for this size, and the 65 mm width gives a bore/width ratio of 4.00; use these ratios when housing space around the 260 mm shaft is the first constraint. Large-bore universal execution: the G suffix marks a universally matchable bearing delivered with controlled axial internal clearance rather than a factory preload, paired here with a machined brass cage (M); BGM is the large-section 70xx/72xx/73xx answer where field-set preload and brass-cage robustness are both required.

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.
• Assign interference to the rotating ring — roughly m6 on a 260 mm rotating shaft with an H7 housing — and let the stationary ring slide for axial setting; reverse the logic if the outer ring rotates.
• Fillet radii must clear the chamfer so the 65 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
• Do not mix execution classes inside one set: a universally matchable BGM unit is ground for arbitrary pairing, a basic execution is not.
• The steep 40° angle of 7052-BGM 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.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 7052 BGM as the single g brass execution; the other order numbers of the 7052 size are different products and may carry different ratings — always quote the full designation when purchasing.