YAR-203-15-2F 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-203-15-2F model number is decoded

The YAR2 series order number YAR 203/15-2F is a SKF insert bearing (Y-bearing) for a 15 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 40 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 slash tail names a non-standard metric bore directly: YAR 203/15 is the 15 mm bore execution of the size series. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 15x40x27.4 mm (0.591x1.575x1.079 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 110 g. Bore-to-OD planning: OD 40 over bore 15 is a 2.667x step, while bore/overall-width gives 0.547; the spherical seat in the matching Y-housing must be specified to the 40 mm OD, not to a cylindrical housing bore. Capacity density: 9.56 kN from 0.110 kg of bearing steel is about 86.909 kN per kilogram, and per width millimetre the 27.4 mm unit carries 0.349 kN of dynamic capacity. Mass-to-load ratio for YAR-203-15-2F: 11.506 g of catalogue mass per rated kN of C, and 7.333 g per millimetre of bore — useful when comparing executions of the same 15x40 mm envelope on the drawing. Static-first planning: the 0.173 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 15 mm shaft, not the 9.56 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.61x10^5 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. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 15 mm shaft inside the 27.4 mm total width while the outer ring is only 12 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 15.9 mm s1 dimension is the screw seating geometry inside the 15.4 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.
• Do not specify the 15 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 9.56/4.75 kN figures belong specifically to YAR 203/15-2F; 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.