1726306-2RS1 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 1726306-2RS1 model number is decoded

1726306-2RS1 is SKF's 30 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 30x72x19 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 1726306 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 06 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 30 mm (code 06 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 30x72x19 mm (1.181x2.835x0.748 in), outer ring 19 mm wide, C 28.1 kN, C0 16 kN, Pu 0.67 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 340 g. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 51 = 160.221 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fillet discipline: the printed r_min 1.1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30x72 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 3.21x10^5 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 1726306-2RS1: 12.1 g of catalogue mass per rated kN of C, and 11.333 g per millimetre of bore — useful when comparing executions of the same 30x72 mm envelope on the drawing. Fatigue-limit check: Pu 0.67 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for 1726306-2RS1 — most belt-driven mounted-unit loads sit comfortably under 2.384 % of C. 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 19 mm width and 30x72 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

• The 30x72 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 1726306-2RS1: 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.
• Catalogue ratings belong to 1726306-2RS1 as the standard std rs1 execution; other order numbers of the 1726306 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation.