YET-209 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 YET-209 model number is decoded

Listed in SKF 17000 chapter 2, YET 209 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 45x85x30.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 45x85x30.2 mm (1.772x3.346x1.189 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 43.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 680 g. Pitch-diameter arithmetic: dm = (45+85)/2 = 65 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.79x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Outer-vs-overall width: the outer ring is 22 mm wide inside the 30.2 mm total, so the extended inner ring accounts for 0.272 of the overall width (8.2 mm of axial projection on the locking side). Bore-to-OD planning: OD 85 over bore 45 is a 1.889x step, while bore/overall-width gives 1.49; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. Mass-to-load ratio for YET-209: 20.482 g of catalogue mass per rated kN of C, and 15.111 g per millimetre of bore — useful when comparing executions of the same 45x85 mm envelope on the drawing. Fatigue-limit check: Pu 0.915 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YET 209 — most belt-driven mounted-unit loads sit comfortably under 2.756 % of C. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-209: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 45 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Overall width 43.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.
• The eccentric collar is handed to running direction; fit it wrong on the 45 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.
• Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.
• The 33.2/21.6 kN figures belong specifically to YET 209; 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.