YAT-211-200 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-211-200 model number is decoded

The YAR2 series order number YAT 211-200 is a SKF insert bearing (Y-bearing) for a 50.8 mm (2 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 100 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 -200 decodes as 2", i.e. 50.8 mm; the metric coded size YAT 211 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 50.8x100x45 mm (2x3.937x1.772 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1000 g. The s1 32.5 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Spherical-seat note in numbers: the 100 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 75.4 = 236.876 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Capacity density: 43.6 kN from 1.000 kg of bearing steel is about 43.6 kN per kilogram, and per width millimetre the 45 mm unit carries 0.969 kN of dynamic capacity. Pitch-diameter arithmetic: dm = (50.8+100)/2 = 75.4 mm; at the 3,600 r/min limiting speed the ball set runs at dn approx 2.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Bore-to-OD planning: OD 100 over bore 50.8 is a 1.969x step, while bore/overall-width gives 1.129; the spherical seat in the matching Y-housing must be specified to the 100 mm OD, not to a cylindrical housing 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. Set-screw geometry on this size: the two 120 deg screws bear on the 50.8 mm shaft inside the 45 mm total width while the outer ring is only 25 mm wide, leaving the extended ring to carry the screw points clear of the ball track.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The 32.5 mm s1 dimension is the screw seating geometry inside the 20 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.
• 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.
• Do not specify the 50.8 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.
• The 43.6/29 kN figures belong specifically to YAT 211-200; 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.