YSPAG-208-108 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 YSPAG-208-108 model number is decoded

The YSP2 series order number YSPAG 208-108 is a SKF insert bearing (Y-bearing) for a 38.099999999999994 mm (1.5 in) 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 80 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. inch bore code -108 decodes as 1" +8/16, i.e. 38.1 mm; the metric coded size YSPAG 208 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 38.099999999999994x80x43.1 mm (1.5x3.15x1.697 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 950 r/min; mass 610 g. At the printed limiting speed of 950 r/min the mean diameter dm = 59.05 mm implies dn about 0.56x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Bore-to-OD planning: OD 80 over bore 38.099999999999994 is a 2.1x step, while bore/overall-width gives 0.884; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 59.05 = 185.511 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Load balance for documentation: C0 19 kN against C 30.7 kN gives a 0.619 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Mass-to-load ratio for YSPAG-208-108: 19.87 g of catalogue mass per rated kN of C, and 16.01 g per millimetre of bore — useful when comparing executions of the same 38.099999999999994x80 mm envelope on the drawing. Reuse note for YSPAG-208-108: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 38.099999999999994 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

• Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 43.1 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.
• 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 38.099999999999994 mm shaft.
• The 30.7/19 kN figures belong specifically to YSPAG 208-108; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records.