YAR-212-2RF 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 YAR-212-2RF model number is decoded

The YAR2 series order number YAR 212-2RF is a SKF insert bearing (Y-bearing) for a 60 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, 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 YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments. Envelope 60x110x65.1 mm (2.362x4.331x2.563 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: 1,800 r/min; mass 1400 g. Capacity density: 52.7 kN from 1.400 kg of bearing steel is about 37.643 kN per kilogram, and per width millimetre the 65.1 mm unit carries 0.81 kN of dynamic capacity. Grease-life arithmetic is dominated by speed: at dn approx 1.53x10^5 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. Selection figures for YAR 212-2RF: C0/C is 0.683, Pu 1.53 kN is 2.903 % of the 52.7 kN dynamic rating, and the 1400 g catalogue mass works out to roughly 23.333 g per millimetre of the 60 mm bore. 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. Fatigue-limit check: Pu 1.53 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 212-2RF — most belt-driven mounted-unit loads sit comfortably under 2.903 % of C. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Set-screw geometry on this size: the two 120 deg screws bear on the 60 mm shaft inside the 65.1 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

• Do not specify the 60 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 39.7 mm s1 dimension is the screw seating geometry inside the 39.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.
• Replacement discipline: a YAR 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.
• Catalogue ratings belong to YAR 212-2RF as the grub two rf execution; other order numbers of the YAR 212 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.