YSP-212-SB-2F bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-28

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 YSP-212-SB-2F model number is decoded

The YSP2 series order number YSP 212 SB-2F is a SKF insert bearing (Y-bearing) for a 60 mm shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 60x110x51.7 mm (2.362x4.331x2.035 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1250 g. Bore-to-OD planning: OD 110 over bore 60 is a 1.833x step, while bore/overall-width gives 1.161; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. The s1 30.5 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 3,400 r/min the mean diameter dm = 85 mm implies dn about 2.89x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 60x110 mm insert on its chamfer tilts the whole spherical seat. Speed ceiling of 3,400 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 51.7 mm overall width while the sphered outer ring stays 26 mm wide — uniform sleeve contraction is why run-out stays low at 60 mm bore.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.
• The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 60 mm shaft.
• Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 51.7 mm-wide sleeve causes a local unclamped arc that later frets.
• Ordering discipline for the 60 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption.