YSA-212-2FK-H-2312 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-212-2FK-H-2312 model number is decoded

YSA 212-2FK H 2312 is SKF's 55 mm-bore tapered-bore (1:12) insert bearing supplied on its H 2312 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 55x110x42.5 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 H 2312 sleeve is drawn up the taper to clamp a plain 55 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the H 2312 adapter sleeve, not by the bearing code: the sleeve seats a 55 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 55x110x42.5 mm (2.165x4.331x1.673 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. Mounted width B1 62 mm includes the adapter sleeve. Supplied/specified with H 2312. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1550 g. Imperial procurement cross-check: 2.165 in bore, 4.331 in OD, 1.673 in overall width; the 1550 g mass converts to 1.550 kg (54.7 oz) for the bill of materials. Width accounting: B1 62 mm covers the bearing WITH its adapter-sleeve hardware against 42.5 mm for the bearing itself and 26 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 55x110 mm insert on its chamfer tilts the whole spherical seat. Envelope arithmetic: the radial section from 55 mm bore to 110 mm OD is 27.5 mm; dividing C 52.7 kN by that section gives 1.916 kN per section millimetre, and the 42.5 mm overall width is 1.545x the section. Outer-vs-overall width: the outer ring is 26 mm wide inside the 42.5 mm total, so the extended inner ring accounts for 0.388 of the overall width (8.25 mm of axial projection per side). 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-212-2FK-H-2312: H 2312 pulls the tapered inner ring onto the 55 mm plain shaft; the printed s1 33.8 mm is the pre-drive distance and 62 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 33.8 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-212-2FK-H-2312 specifies the H 2312 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.
• The 52.7/36 kN figures belong specifically to YSA 212-2FK H 2312; 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.