1726310-2RS1 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 1726310-2RS1 model number is decoded

The 17263 series order number 1726310-2RS1 is a SKF insert bearing (Y-bearing) for a 50 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 110 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 10 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 50 mm (code 10 x 5) 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 50x110x27 mm (1.969x4.331x1.063 in), outer ring 27 mm wide, C 61.8 kN, C0 38 kN, Pu 1.6 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 1050 g. Grease-life arithmetic is dominated by speed: at dn approx 3.44x10^5 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. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 68.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Spherical-seat note in numbers: the 110 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 80 = 251.327 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Bore-to-OD planning: OD 110 over bore 50 is a 2.2x step, while bore/overall-width gives 1.852; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. Speed ceiling of 4,300 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. 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. Geometry note: with the standard inner ring the 27 mm width and 50x110 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 1726310-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.
• The 50x110 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.
• 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 61.8/38 kN figures belong specifically to 1726310-2RS1; 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.