YSP-212-207-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-212-207-SB-2F model number is decoded

YSP 212-207 SB-2F is SKF's 61.912499999999994 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 61.912499999999994x110x51.7 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -207 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 7/16 in = 61.912 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 61.912499999999994x110x51.7 mm (2.438x4.331x2.035 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 1200 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 75.64 mm, d2 87.6 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Envelope arithmetic: the radial section from 61.912499999999994 mm bore to 110 mm OD is 24.044 mm; dividing C 52.7 kN by that section gives 2.192 kN per section millimetre, and the 51.7 mm overall width is 2.15x the section. 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. Pitch-diameter arithmetic: dm = (61.912499999999994+110)/2 = 85.956 mm; at the 3,400 r/min limiting speed the ball set runs at dn approx 2.92x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Width accounting on this execution: 51.7 mm overall and 26 mm outer-ring width leave the housing designer 25.7 mm of inner-ring projection to accommodate the locking arrangement. 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. Reuse note for YSP-212-207-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 61.912499999999994 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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 61.912499999999994 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.
• 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.
• Catalogue ratings belong to YSP 212-207 SB-2F as the concentra two f execution; other order numbers of the YSP 212-207 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation.