YAT-209-111 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 YAT-209-111 model number is decoded

The YAR2 series order number YAT 209-111 is a SKF insert bearing (Y-bearing) for a 42.8625 mm (1.688 in) shaft: grub-screw insert bearing with the inner ring extended on one side, built to the ISO 15 diameter-series envelope with a sphered OD of 85 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -111 decodes as 1" +11/16, i.e. 42.862 mm; the metric coded size YAT 209 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 42.8625x85x37 mm (1.688x3.346x1.457 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 610 g. Grease-life arithmetic is dominated by speed: at dn approx 2.75x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Bore-to-OD planning: OD 85 over bore 42.8625 is a 1.983x step, while bore/overall-width gives 1.158; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 1.688 in bore, 3.346 in OD, 1.457 in overall width; the 610 g mass converts to 0.610 kg (21.5 oz) for the bill of materials. Mass-to-load ratio for YAT-209-111: 18.373 g of catalogue mass per rated kN of C, and 14.232 g per millimetre of bore — useful when comparing executions of the same 42.8625x85 mm envelope on the drawing. Selection figures for YAT 209-111: C0/C is 0.651, Pu 0.915 kN is 2.756 % of the 33.2 kN dynamic rating, and the 610 g catalogue mass works out to roughly 14.232 g per millimetre of the 42.8625 mm bore. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Service tip for YAT-209-111: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 21.069 mm radial section.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The 25.8 mm s1 dimension is the screw seating geometry inside the 15 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.
• Do not specify the 42.8625 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.
• Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.
• The 33.2/21.6 kN figures belong specifically to YAT 209-111; 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.