1726203-2RS1 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 1726203-2RS1 model number is decoded

1726203-2RS1 is SKF's 17 mm-bore insert bearing with a standard (non-extended) inner ring in the 17262 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 17x40x12 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 1726203 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 03 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 17 mm 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 17x40x12 mm (0.669x1.575x0.472 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. The catalogue publishes a single speed ceiling, the limiting speed: 12,000 r/min; mass 60 g. Capacity density: 9.56 kN from 0.060 kg of bearing steel is about 159.333 kN per kilogram, and per width millimetre the 12 mm unit carries 0.797 kN of dynamic capacity. Bore-to-OD planning: OD 40 over bore 17 is a 2.353x step, while bore/overall-width gives 1.417; the spherical seat in the matching Y-housing must be specified to the 40 mm OD, not to a cylindrical housing bore. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 17x40 mm insert on its chamfer tilts the whole spherical seat. Imperial procurement cross-check: 0.669 in bore, 1.575 in OD, 0.472 in overall width; the 60 g mass converts to 0.060 kg (2.1 oz) for the bill of materials. Pitch-diameter arithmetic: dm = (17+40)/2 = 28.5 mm; at the 12,000 r/min limiting speed the ball set runs at dn approx 3.42x10^5, 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 1726203-2RS1: 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.
• No locking device means shaft preparation is everything for 1726203-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.
• The 17x40 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.
• Ordering discipline for the 17 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.