YSA-205-2FK-HE-2305 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-205-2FK-HE-2305 model number is decoded

YSA 205-2FK HE 2305 is SKF's 19.05 mm-bore tapered-bore (1:12) insert bearing supplied on its HE 2305 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 19.05x52x24 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HE 2305 sleeve is drawn up the taper to clamp a plain 19.05 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HE 2305 adapter sleeve, not by the bearing code: the sleeve seats a 19.05 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 19.05x52x24 mm (0.75x2.047x0.945 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 35 mm includes the adapter sleeve. Supplied/specified with HE 2305. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 250 g. Fatigue-limit check: Pu 0.335 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSA 205-2FK HE 2305 — most belt-driven mounted-unit loads sit comfortably under 2.393 % of C. Rating split for the maintenance file: dynamic 14 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for YSA 205-2FK HE 2305, none interchangeable with another. At the printed limiting speed of 7,000 r/min the mean diameter dm = 35.525 mm implies dn about 2.49x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Imperial procurement cross-check: 0.75 in bore, 2.047 in OD, 0.945 in overall width; the 250 g mass converts to 0.250 kg (8.8 oz) for the bill of materials. Mass-to-load ratio for YSA-205-2FK-HE-2305: 17.857 g of catalogue mass per rated kN of C, and 13.123 g per millimetre of bore — useful when comparing executions of the same 19.05x52 mm envelope on the drawing. 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. Sleeve geometry on YSA-205-2FK-HE-2305: HE 2305 pulls the tapered inner ring onto the 19.05 mm plain shaft; the printed s1 20.5 mm is the pre-drive distance and 35 mm is the overall width including the sleeve hardware.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Sleeve drive-up uses the printed s1 20.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.
• 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 order number is incomplete without the sleeve: YSA-205-2FK-HE-2305 specifies the HE 2305 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.
• The 14/7.8 kN figures belong specifically to YSA 205-2FK HE 2305; 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.