YAR-205-100-2RF 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-205-100-2RF model number is decoded

The YAR2 series order number YAR 205-100-2RF is a SKF insert bearing (Y-bearing) for a 25.4 mm (1 in) 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 52 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. inch bore code -100 decodes as 1", i.e. 25.4 mm; the metric coded size YAR 205 shares the same envelope but its bore is the metric value, not this one. -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 25.4x52x34.1 mm (1x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 190 g. The s1 19.8 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. Outer-vs-overall width: the outer ring is 15 mm wide inside the 34.1 mm total, so the extended inner ring accounts for 0.56 of the overall width (9.55 mm of axial projection per side). Imperial procurement cross-check: 1 in bore, 2.047 in OD, 1.343 in overall width; the 190 g mass converts to 0.190 kg (6.7 oz) for the bill of materials. Pitch-diameter arithmetic: dm = (25.4+52)/2 = 38.7 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 1.66x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Grease-life arithmetic is dominated by speed: at dn approx 1.66x10^5 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. 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. Service tip for YAR-205-100-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.3 mm radial section.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.
• Do not specify the 25.4 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.
• 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.
• The 14/7.8 kN figures belong specifically to YAR 205-100-2RF; 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.