1726308-2RS1 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 1726308-2RS1 model number is decoded

1726308-2RS1 is SKF's 40 mm-bore insert bearing with a standard (non-extended) inner ring in the 17263 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 40x90x23 mm. Unlike the extended-ring Y executions this is a standard-width sealed deep-groove ball insert: normal-width inner ring, spherically ground outer ring, static self-alignment only through the housing seat. the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726308 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 08 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 40 mm (code 08 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing. Envelope 40x90x23 mm (1.575x3.543x0.906 in), outer ring 23 mm wide, C 41 kN, C0 24 kN, Pu 1 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 610 g. Bore-to-OD planning: OD 90 over bore 40 is a 2.25x step, while bore/overall-width gives 1.739; the spherical seat in the matching Y-housing must be specified to the 90 mm OD, not to a cylindrical housing bore. Mounting verification on 1726308-2RS1 uses the printed catalogue procedure rather than torque guessing. Grease-life arithmetic is dominated by speed: at dn approx 3.25x10^5 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 1726308-2RS1: 14.878 g of catalogue mass per rated kN of C, and 15.25 g per millimetre of bore — useful when comparing executions of the same 40x90 mm envelope on the drawing. Selection figures for 1726308-2RS1: C0/C is 0.585, Pu 1 kN is 2.439 % of the 41 kN dynamic rating, and the 610 g catalogue mass works out to roughly 15.25 g per millimetre of the 40 mm bore. 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 23 mm width and 40x90 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

• 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 40x90 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 1726308-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.
• Ordering discipline for the 40 mm size: the chapter lists several executions side by side (17263 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.