YELAG-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 YELAG-209-112 model number is decoded

Listed in SKF 17000 chapter 2, YELAG 209-112 is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 44.449999999999996x85x42.8 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 YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -112 = 44.45 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 44.449999999999996x85x42.8 mm (1.75x3.346x1.685 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 850 r/min; mass 800 g. Imperial procurement cross-check: 1.75 in bore, 3.346 in OD, 1.685 in overall width; the 800 g mass converts to 0.800 kg (28.2 oz) for the bill of materials. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 44.449999999999996x85 mm insert on its chamfer tilts the whole spherical seat. Fatigue-limit check: Pu 0.915 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YELAG 209-112 — most belt-driven mounted-unit loads sit comfortably under 2.756 % of C. Static-first planning: the 0.505 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 44.449999999999996 mm shaft, not the 33.2 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 0.55x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. Collar geometry for this size: over the 22 mm outer-ring width the inner ring runs to 42.8 mm overall (56.3 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

• Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL 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.
• 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 YELAG 209-112; 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.