7317-BEM 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 7317-BEM model number is decoded

7317 BEM is SKF's 85 mm-bore single-row angular-contact ball bearing in the 7300 series, nominal 40° (B) contact angle, 85×180×41 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. machined brass cage, ball-centred (suffix M), the choice for high speed, marginal lubrication and shock duty. The BEM is a basic single bearing with a machined brass cage — not ground for universal matching; use the BCBM or BECBM execution when defined DB/DF sets are required.. Envelope 85×180×41 mm (3.346×7.087×1.614 in), 47.5 mm radial section height, C 146 kN, C0 122 kN, Pu 4.5 kN.reference speed 4,500 r/min (thermal) and limiting speed 4,500 r/min (mechanical), which coincide for this size, catalogue mass 4450 g. Sizing arithmetic on the 85 mm bore: 146 kN C divided by the 47.5 mm radial section height gives 3.1 kN per section millimetre; the 4450 g mass and 3 % Pu/C share frame the light-load floor for the adjusted-life check. The 4.5 kN fatigue load limit is the equivalent-load floor for long-life adjustment; with 146/122 kN ratings and 4450 g mass this execution carries about 1.72 kN of C per millimetre of bore. Speed-ratio note for this exact unit: the reference speed is 4,500 r/min against a 4,500 r/min limiting speed, i.e. a reference-to-limit ratio of 1.00. Ordering note: BEM pairs the optimized 40-degree geometry with a machined one-piece brass window cage as a basic (non-universal) single bearing; it is the brass-cage counterpart of the polymer BEP, and universally matchable positions must use the BECBM or BCBM execution instead.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Preload the set against a calculated stand-off dimension — the ground faces of BEM establish it, but locknut torque, sleeve crush and housing-face squareness each consume part of the allowance.
• At 85 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.
• 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.
• The steep 40° angle of 7317-BEM 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 7317 BEM as the single basic machined brass execution; the other order numbers of the 7317 size are different products and may carry different ratings — always quote the full designation when purchasing.