YAR-208-2RF-VE495 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-208-2RF-VE495 model number is decoded

The YAR2 series order number YAR 208-2RF/VE495 is a SKF insert bearing (Y-bearing) for a 40 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 80 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 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing. Envelope 40x80x49.2 mm (1.575x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 610 g. Capacity density: 30.7 kN from 0.610 kg of bearing steel is about 50.328 kN per kilogram, and per width millimetre the 49.2 mm unit carries 0.624 kN of dynamic capacity. Outer-vs-overall width: the outer ring is 21 mm wide inside the 49.2 mm total, so the extended inner ring accounts for 0.573 of the overall width (14.1 mm of axial projection per side). Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 208-2RF/VE495 — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Static-first planning: the 0.386 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 40 mm shaft, not the 30.7 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 1.68x10^5 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. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 40 mm shaft inside the 49.2 mm total width while the outer ring is only 21 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 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 40 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 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.
• Ordering discipline for the 40 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.