7211 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 3.1 single-row ACBB) · extracted 2026-09-26

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 3.1 single-row ACBB); 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 model number is decoded

The SKF 7211 BEP is a 55×100×21 mm single-row angular-contact ball bearing — the light (7200) series of the SKF 7xxx line, built on the ISO 15 envelope shared with the 6211 deep-groove size but cut for combined radial and one-direction axial load.The code breaks down as type prefix 7 (angular contact), diameter series 2 (the light section), and bore code 11 = 55 mm; dimensions 55×100×21 mm therefore match the 6211 deep-groove envelope even though the internal design is different. Suffix letters after 7211 describe the build: B fixes the 40° contact angle, E denotes the reinforced internal geometry, and P identifies the moulded PA66 glass-fibre cage rather than a stamped-steel or machined-brass one. Selection arithmetic: the C0/C ratio is about 0.78 (static 36 kN against dynamic 46.2 kN), typical of a 40° angle sized for axial capacity, and the 1.53 kN fatigue load limit Pu is the equivalent-load floor used in the SKF life calculation. A single 7211 locates the shaft in one axial direction only; for bidirectional location order a matched pair — DB for moment stiffness, DF for tolerance of thermal expansion — and size the preload against the real load and speed of the position.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 55 mm bore 7211 by induction heating of the inner ring (max 120 °C — the PA66 cage sets the ceiling, not the steel); driving it home through the outer ring or balls brinells the asymmetric raceway.
• The 72xx light section at 55 mm bore is the general-purpose angular-contact envelope (100×21 mm); stepping up to a 7311 changes OD, width and heat generation — it is not a drop-in swap when the housing and speed are fixed.
• The 40° contact angle creates an induced axial load under pure radial force; include it in the 7211 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its balls.
• Do not mix execution classes inside one 7211 pair — universal-matchable (CB) bearings are ground for arbitrary pairing, but a CB unit paired with an unmatched basic BEP bearing will not share preload evenly.
• The 620 g mass and 21 mm width mean locknut and spacer faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the contact angle and concentrates load on one shoulder of 7211.
• The 46.2/36 kN ratings are SKF catalogue 17000 values for the 7211 BEP execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
• SKF lists several executions of 7211 (BEP basic, BECBP universally matchable, BE-2RZP sealed, BECBM brass-cage, ACC-series at 25°); they are not interchangeable order numbers — quote the full 7211 BEP designation when purchasing and match the execution to the mounting arrangement.
• A plain 7211 BEP is a single open bearing, not a universally matchable one; to mount a defined DB/DF pair order the BECBP (CB) execution — pairing two unmatched basic units gives uncontrolled preload because the side faces are not ground for set mounting.