1726307-2RS1 bearing: complete specifications & equivalents
The 1726307-2RS1 is a ISO 15 radial bearing sized 35 x 80 x 21 mm (bore x OD x width) with 2RS sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 35 mm |
| Outer diameter D | 80 mm |
| Width B | 21 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 33.2 kN |
| Basic static load rating C0 | 19 kN |
| Fatigue load limit Pu | 0.815 kN |
| Limiting speed (mechanical) | 6000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 440 g |
| Manufacturer designation | 1726307-2RS1 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-28 |
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.
Dimensions in inches & 17263-series range
| Bore d | 1.378 in |
|---|---|
| Outer diameter D | 3.15 in |
| Width B | 0.827 in |
| ISO bore code | 07 |
| Radial section height (D−d)/2 | 22.5 mm |
| Smallest bore in 17263-series | 25 mm |
| Largest outer diameter in 17263-series | 110 mm |
| Width range across 17263-series | 17–27 mm |
| Bore position in 17263-series (smallest first) | 3 of 6 |
| Bore above smallest 17263-series size | 10 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6307 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6307 shares the 35x80x21 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6307 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute. |
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 1726307-2RS1 model number is decoded
The 17263 series order number 1726307-2RS1 is a SKF insert bearing (Y-bearing) for a 35 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 80 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 07 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 35 mm (code 07 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 35x80x21 mm (1.378x3.15x0.827 in), outer ring 21 mm wide, C 33.2 kN, C0 19 kN, Pu 0.815 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,000 r/min; mass 440 g. Speed ceiling of 6,000 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. Fatigue-limit check: Pu 0.815 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for 1726307-2RS1 — most belt-driven mounted-unit loads sit comfortably under 2.455 % of C. Selection figures for 1726307-2RS1: C0/C is 0.572, Pu 0.815 kN is 2.455 % of the 33.2 kN dynamic rating, and the 440 g catalogue mass works out to roughly 12.571 g per millimetre of the 35 mm bore. Mounting verification on 1726307-2RS1 uses the printed catalogue procedure rather than torque guessing. At the printed limiting speed of 6,000 r/min the mean diameter dm = 57.5 mm implies dn about 3.45x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same 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 21 mm width and 35x80 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
Common applications
- fan and conveyor positions ordered as ISO-envelope spares
- Y-housing units on standard machined shafts
- general machinery using Y-flange and Y-pillow housings
Known failure patterns
- VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing
- treated as a normal cylindrical-OD bearing and pressed into a plain bore: the sphered outer surface cannot locate radially without the matching spherical housing seat
- water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess
- relubricated with incompatible grease that hardens the factory fill and drags the seals
- pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves
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 35x80 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 1726307-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.
- Ordering discipline for the 35 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.
Frequently asked questions
What are the dimensions and catalogue data of 1726307-2RS1?
Boundary dimensions: bore 35 mm, sphered OD 80 mm, overall width 21 mm; weight 440 g. Loads: dynamic 33.2 kN, static 19 kN, fatigue 0.815 kN; the only published speed is the 6,000 r/min limiting value.
What does the designation 1726307-2RS1 mean?
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 07 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 35 mm (code 07 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.
How is axial position secured with no locking device?
Through the recommended shaft and housing fits, abutments and any snap rings per the catalogue — there are no screws, collar or sleeve. The spherical OD still supplies the static self-alignment in the Y-housing.
What do B and VP274 mean?
B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-28. Read our editorial & correction policy.