7211-BECBPH 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 7211-BECBPH model number is decoded

7211 BECBPH is SKF's 55 mm-bore single-row angular-contact ball bearing in the 7200 series, nominal 40° (B) contact angle, 55×100×21 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. BECBPH combines CB universal clearance with a PEEK ball-centred cage for hot, high-speed positions where PA66 is unsuitable. Envelope 55×100×21 mm (2.165×3.937×0.827 in), 22.5 mm radial section height, C 49 kN, C0 40 kN, Pu 1.66 kN.reference speed 8,000 r/min (thermal) and limiting speed 8,000 r/min (mechanical), which coincide for this size, catalogue mass 620 g. Load balance: C0 40 kN against C 49 kN gives a 0.82 ratio, typical of a steep-angle axial-oriented design; Pu 1.66 kN enters the SKF adjusted-life equation rather than the basic rating life. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 8,000 r/min while thermal balance under catalogue load sets the 8,000 r/min reference; at dm ≈ 77.5 mm the corresponding dn is approximately 620k mm·r/min. Bore-to-OD planning: OD 100 over bore 55 is a 1.82× step for this size, and the 21 mm width gives a bore/width ratio of 2.62; use these ratios when housing space around the 55 mm shaft is the first constraint. PEEK cage note: the PH cage is moulded from glass-fibre reinforced polyetheretherketone, ball-centred, aimed at high-speed oil-air and grease positions where PA66 would approach its thermal and speed limits; it needs clean lubricant (PEEK cages are sensitive to hard-particle cage-wear) and is a separate order number from the brass BECBM.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Reference and limiting speeds are different ceilings: design to both, and remember preload and oil/air cooling move the real thermal limit far from the catalogue reference value.
• Assign interference to the rotating ring — roughly k5 on a 55 mm rotating shaft with an H7 housing — and let the stationary ring slide for axial setting; reverse the logic if the outer ring rotates.
• Greased positions should fill roughly 25–35 % of the free volume on a 7211-BECBPH 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 21 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
• The steep 40° angle of 7211-BECBPH 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 BECBPH 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.