YET-209-112 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-209-112 model number is decoded

YET 209-112 is SKF's 44.449999999999996 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 44.449999999999996x85x30.2 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -112 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 12/16 in = 44.45 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 30.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 44.449999999999996x85x30.2 mm (1.75x3.346x1.189 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 690 g. Pitch-diameter arithmetic: dm = (44.449999999999996+85)/2 = 64.725 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.78x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. The s1 32.7 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YET 209-112, none interchangeable with another. Envelope arithmetic: the radial section from 44.449999999999996 mm bore to 85 mm OD is 20.275 mm; dividing C 33.2 kN by that section gives 1.637 kN per section millimetre, and the 30.2 mm overall width is 1.49x the section. Mass-to-load ratio for YET-209-112: 20.783 g of catalogue mass per rated kN of C, and 15.523 g per millimetre of bore — useful when comparing executions of the same 44.449999999999996x85 mm envelope on the drawing. 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. Collar geometry for this size: over the 22 mm outer-ring width the inner ring runs to 30.2 mm overall (43.7 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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.
• 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 44.449999999999996 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.
• Ordering discipline for the 44.449999999999996 mm size: the chapter lists several executions side by side (YEL2 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.