7048-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 7048-BGM model number is decoded

7048 BGM is SKF's 240 mm-bore single-row angular-contact ball bearing in the 7000 series, nominal 40° (B) contact angle, 240×360×56 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 240×360×56 mm (9.449×14.173×2.205 in), 60.0 mm radial section height, C 260 kN, C0 375 kN, Pu 9.15 kN.reference speed 1,900 r/min (thermal) and limiting speed 1,900 r/min (mechanical), which coincide for this size, catalogue mass 19000 g. The 9.15 kN fatigue load limit is the equivalent-load floor for long-life adjustment; with 260/375 kN ratings and 19000 g mass this execution carries about 1.08 kN of C per millimetre of bore. Mass and section check: 19000 g inside the 240×360×56 mm outline leaves a 60.0 mm radial section, and the 375 kN static rating is 1.44× the dynamic rating — plan static safety and minimum load against those numbers rather than against sister executions. Speed-ratio note for this exact unit: the reference speed is 1,900 r/min against a 1,900 r/min limiting speed, i.e. a reference-to-limit ratio of 1.00. 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.
• Mount by induction-heating the inner ring to max 120 °C; driving the bearing home through the outer ring or balls brinells the asymmetric raceway.
• One 7048-BGM 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.
• Fillet radii must clear the chamfer so the 56 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
• The steep 40° angle of 7048-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 7048 BGM as the single g brass execution; the other order numbers of the 7048 size are different products and may carry different ratings — always quote the full designation when purchasing.