7318-BECBP 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 7318-BECBP model number is decoded

7318 BECBP is SKF's 90 mm-bore single-row angular-contact ball bearing in the 7300 series, nominal 40° (B) contact angle, 90×190×43 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 PA66 cage, ball-centred (suffix P), with a 120 °C continuous-temperature ceiling. 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 90×190×43 mm (3.543×7.48×1.693 in), 50.0 mm radial section height, C 166 kN, C0 146 kN, Pu 5.3 kN.reference speed 4,300 r/min (thermal) and limiting speed 4,500 r/min (mechanical), catalogue mass 5200 g. Sizing arithmetic on the 90 mm bore: 166 kN C divided by the 50.0 mm radial section height gives 3.3 kN per section millimetre; the 5200 g mass and 3 % Pu/C share frame the light-load floor for the adjusted-life check. Mass and section check: 5200 g inside the 90×190×43 mm outline leaves a 50.0 mm radial section, and the 146 kN static rating is 0.88× the dynamic rating — plan static safety and minimum load against those numbers rather than against sister executions. Bore-to-OD planning: OD 190 over bore 90 is a 2.11× step for this size, and the 43 mm width gives a bore/width ratio of 2.09; use these ratios when housing space around the 90 mm shaft is the first constraint. Universal polymer-cage execution: BECBP is the factory-ground set-mounting version of the basic BEP — both side faces are finish-ground to a controlled stand-off so two units form DB, DF or DT arrangements without shims, while the glass-fibre PA66 ball-centred cage keeps the light, quiet running typical of the P-cage range; CB delivers Normal axial clearance before preload is applied at assembly.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Fillet radii must clear the chamfer so the 43 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
• Greased positions should fill roughly 25–35 % of the free volume on a 7318-BECBP of this section and route the surplus past the outer ring; overpacking churns the grease and reproduces the thermal preload problem mechanically.
• Fillet radii must clear the chamfer so the 43 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
• 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 7318-BECBP 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 BECBP 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.