1726210-2RS1 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 1726210-2RS1 model number is decoded

The 17262 series order number 1726210-2RS1 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 90 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 50x90x20 mm (1.969x3.543x0.787 in), outer ring 20 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 440 g. Grease-life arithmetic is dominated by speed: at dn approx 3.36x10^5 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. Mass-to-load ratio for 1726210-2RS1: 12.536 g of catalogue mass per rated kN of C, and 8.8 g per millimetre of bore — useful when comparing executions of the same 50x90 mm envelope on the drawing. Load balance for documentation: C0 23.2 kN against C 35.1 kN gives a 0.661 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Imperial procurement cross-check: 1.969 in bore, 3.543 in OD, 0.787 in overall width; the 440 g mass converts to 0.440 kg (15.5 oz) for the bill of materials. Pitch-diameter arithmetic: dm = (50+90)/2 = 70 mm; at the 4,800 r/min limiting speed the ball set runs at dn approx 3.36x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. 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 1726210-2RS1: 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

• 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 50x90 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.
• No locking device means shaft preparation is everything for 1726210-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.
• Ordering discipline for the 50 mm size: the chapter lists several executions side by side (17262 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.