YAT-212-207 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-212-207 model number is decoded

The YAR2 series order number YAT 212-207 is a SKF insert bearing (Y-bearing) for a 61.912499999999994 mm (2.438 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 110 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 -207 decodes as 2" +7/16, i.e. 61.912 mm; the metric coded size YAT 212 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 61.912499999999994x110x48.5 mm (2.438x4.331x1.909 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1100 g. Pitch-diameter arithmetic: dm = (61.912499999999994+110)/2 = 85.956 mm; at the 3,400 r/min limiting speed the ball set runs at dn approx 2.92x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Load balance for documentation: C0 36 kN against C 52.7 kN gives a 0.683 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 75.6 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Bore-to-OD planning: OD 110 over bore 61.912499999999994 is a 1.777x step, while bore/overall-width gives 1.277; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. Mass-to-load ratio for YAT-212-207: 20.873 g of catalogue mass per rated kN of C, and 17.767 g per millimetre of bore — useful when comparing executions of the same 61.912499999999994x110 mm envelope on the drawing. 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 61.912499999999994 mm shaft inside the 48.5 mm total width while the outer ring is only 26 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

• 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 61.912499999999994 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 35 mm s1 dimension is the screw seating geometry inside the 22.5 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.
• Ordering discipline for the 61.912499999999994 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption.