1726305-2RS1 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 1726305-2RS1 model number is decoded

The 17263 series order number 1726305-2RS1 is a SKF insert bearing (Y-bearing) for a 25 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 62 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 05 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 25 mm bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope. Envelope 25x62x17 mm (0.984x2.441x0.669 in), outer ring 17 mm wide, C 22.5 kN, C0 11.6 kN, Pu 0.49 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,500 r/min; mass 220 g. Envelope arithmetic: the radial section from 25 mm bore to 62 mm OD is 18.5 mm; dividing C 22.5 kN by that section gives 1.216 kN per section millimetre, and the 17 mm overall width is 0.919x the section. Outer-vs-overall width: the outer ring is 17 mm wide inside the 17 mm total, equal to the overall width because this is the standard-inner-ring execution. Bore-to-OD planning: OD 62 over bore 25 is a 2.48x step, while bore/overall-width gives 1.471; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Mass-to-load ratio for 1726305-2RS1: 9.778 g of catalogue mass per rated kN of C, and 8.8 g per millimetre of bore — useful when comparing executions of the same 25x62 mm envelope on the drawing. 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. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726305-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• No locking device means shaft preparation is everything for 1726305-2RS1: 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 25x62 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 22.5/11.6 kN figures belong specifically to 1726305-2RS1; 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.