YSA-206-2FK-HE-2306 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-206-2FK-HE-2306 model number is decoded

Listed in SKF 17000 chapter 2, YSA 206-2FK HE 2306 is a tapered-bore (1:12) insert bearing supplied on its HE 2306 adapter sleeve, 25.4x62x28 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 HE 2306 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 25.4 mm. adapter mounting means the effective bore is the sleeve bore: HE 2306 gives the 25.4 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 25.4x62x28 mm (1x2.441x1.102 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 38 mm includes the adapter sleeve. Supplied/specified with HE 2306. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 370 g. Fatigue-limit check: Pu 0.475 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSA 206-2FK HE 2306 — most belt-driven mounted-unit loads sit comfortably under 2.436 % of C. Rating split for the maintenance file: dynamic 19.5 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for YSA 206-2FK HE 2306, none interchangeable with another. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 43.7 = 137.288 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. 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 62 over bore 25.4 is a 2.441x step, while bore/overall-width gives 0.907; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. 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-206-2FK-HE-2306: HE 2306 pulls the tapered inner ring onto the 25.4 mm plain shaft; the printed s1 22.5 mm is the pre-drive distance and 38 mm is the overall width including the sleeve hardware.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The order number is incomplete without the sleeve: YSA-206-2FK-HE-2306 specifies the HE 2306 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.
• Sleeve drive-up uses the printed s1 22.5 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.
• Catalogue ratings belong to YSA 206-2FK HE 2306 as the adapter two f execution; other order numbers of the YSA 206-2FK size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation.