1726309-B-2RS1-VP274 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 1726309-B-2RS1-VP274 model number is decoded

The 17263 series order number 1726309B-2RS1/VP274 is a SKF insert bearing (Y-bearing) for a 45 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 09 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 45 mm (code 09 x 5) bore. the B-2RS1/VP274 designation combines outer-ring lubrication holes (B) with nitrile contact seals each side (VP274) — the sealed, re-lubricatable execution of the 172 range. Envelope 45x100x25 mm (1.772x3.937x0.984 in), outer ring 25 mm wide, C 52.7 kN, C0 31.5 kN, Pu 1.34 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,500 r/min; mass 810 g. Selection figures for 1726309B-2RS1/VP274: C0/C is 0.598, Pu 1.34 kN is 2.543 % of the 52.7 kN dynamic rating, and the 810 g catalogue mass works out to roughly 18 g per millimetre of the 45 mm bore. Capacity density: 52.7 kN from 0.810 kg of bearing steel is about 65.062 kN per kilogram, and per width millimetre the 25 mm unit carries 2.108 kN of dynamic capacity. Grease-life arithmetic is dominated by speed: at dn approx 3.26x10^5 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. Static-first planning: the 1.26 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 45 mm shaft, not the 52.7 kN L10 value. Speed ceiling of 4,500 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Lubrication-hole note: the B execution carries outer-ring lubrication holes feeding the sphered outside surface; align the hole with the housing groove before clamping the cap, because a hole sealed off by a misaligned housing traps old grease and starves the spherical seat during re-lubrication. Geometry note: with the standard inner ring the 25 mm width and 45x100 mm bore/OD match the 63-series deep-groove ball envelope, while only the sphered outer surface identifies it as a Y-insert.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• No locking device means shaft preparation is everything for 1726309-B-2RS1-VP274: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.
• When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.
• The 45x100 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.
• The 52.7/31.5 kN figures belong specifically to 1726309B-2RS1/VP274; 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.