YARAG-205 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 YARAG-205 model number is decoded

Listed in SKF 17000 chapter 2, YARAG 205 is a grub-screw insert bearing with the inner ring extended on both sides, 25x52x34.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 25x52x34.1 mm (0.984x2.047x1.343 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: 1,500 r/min; mass 190 g. Bore-to-OD planning: OD 52 over bore 25 is a 2.08x step, while bore/overall-width gives 0.733; the spherical seat in the matching Y-housing must be specified to the 52 mm OD, not to a cylindrical housing bore. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 25x52 mm insert on its chamfer tilts the whole spherical seat. Selection figures for YARAG 205: C0/C is 0.557, Pu 0.335 kN is 2.393 % of the 14 kN dynamic rating, and the 190 g catalogue mass works out to roughly 7.6 g per millimetre of the 25 mm bore. Pitch-diameter arithmetic: dm = (25+52)/2 = 38.5 mm; at the 1,500 r/min limiting speed the ball set runs at dn approx 0.58x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Static-first planning: the 0.229 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 25 mm shaft, not the 14 kN L10 value. Set-screw geometry on this size: the two 120 deg screws bear on the 25 mm shaft inside the 34.1 mm total width while the outer ring is only 15 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 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 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 YARAG 205; 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.