YSA-209-2FK-H-2309 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 YSA-209-2FK-H-2309 model number is decoded

Listed in SKF 17000 chapter 2, YSA 209-2FK H 2309 is a tapered-bore (1:12) insert bearing supplied on its H 2309 adapter sleeve, 40x85x35 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction combines capped deep-groove geometry, a tapered inner-ring bore and the supplied adapter sleeve with locknut seating — factory-grade concentricity on plain drawn shafting. YSA is the adapter-sleeve member of the Y range — tapered bore plus the H 2309 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 40 mm. adapter mounting means the effective bore is the sleeve bore: H 2309 gives the 40 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 40x85x35 mm (1.575x3.346x1.378 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 50 mm includes the adapter sleeve. Supplied/specified with H 2309. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 840 g. 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 YSA 209-2FK H 2309, none interchangeable with another. Imperial procurement cross-check: 1.575 in bore, 3.346 in OD, 1.378 in overall width; the 840 g mass converts to 0.840 kg (29.6 oz) for the bill of materials. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 40x85 mm insert on its chamfer tilts the whole spherical seat. The s1 29 mm dimension is printed for the locking zone — the distance before the adapter sleeve is driven up the taper — and it is verified at mounting, not recoverable from d/D/B alone. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 56.8 mm, d3 65 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-209-2FK-H-2309: slide H 2309 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Sleeve drive-up uses the printed s1 29 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.
• The order number is incomplete without the sleeve: YSA-209-2FK-H-2309 specifies the H 2309 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.
• Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.
• The 33.2/21.6 kN figures belong specifically to YSA 209-2FK H 2309; 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.