1726310-B-2RS1-VP274 bearing: complete specifications & equivalents
The 1726310-B-2RS1-VP274 is a ISO 15 radial bearing sized 50 x 110 x 27 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 | 50 mm |
| Outer diameter D | 110 mm |
| Width B | 27 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 61.8 kN |
| Basic static load rating C0 | 38 kN |
| Fatigue load limit Pu | 1.6 kN |
| Limiting speed (mechanical) | 4300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1000 g |
| Manufacturer designation | 1726310B-2RS1/VP274 |
| 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 | 1.969 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.063 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 30 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) | 6 of 6 |
| Bore above smallest 17263-series size | 25 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 1726310-2RS1 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 50x110x27 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; 1726310-2RS1 is the standard inner ring, fit-located execution of this size — boundary dimensions interchangeable, locking/seal execution differs. |
| 6310 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6310 shares the 50x110x27 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 6310 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 1726310-B-2RS1-VP274 model number is decoded
The 17263 series order number 1726310B-2RS1/VP274 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 110 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 B-2RS1/VP274 designation combines outer-ring lubrication holes (B) with nitrile contact seals each side (VP274) — the sealed, re-lubricatable execution of the 172 range. Envelope 50x110x27 mm (1.969x4.331x1.063 in), outer ring 27 mm wide, C 61.8 kN, C0 38 kN, Pu 1.6 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 1000 g. Mass-to-load ratio for 1726310-B-2RS1-VP274: 16.181 g of catalogue mass per rated kN of C, and 20 g per millimetre of bore — useful when comparing executions of the same 50x110 mm envelope on the drawing. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 68.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Static-first planning: the 1.407 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50 mm shaft, not the 61.8 kN L10 value. Bore-to-OD planning: OD 110 over bore 50 is a 2.2x step, while bore/overall-width gives 1.852; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. Capacity density: 61.8 kN from 1.000 kg of bearing steel is about 61.8 kN per kilogram, and per width millimetre the 27 mm unit carries 2.289 kN of dynamic capacity. Lubrication-hole note: the B execution carries outer-ring lubrication holes feeding the sphered outside surface; align the hole with the housing groove before clamping the cap, because a hole sealed off by a misaligned housing traps old grease and starves the spherical seat during re-lubrication. Fit note for 1726310-B-2RS1-VP274: 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
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
- shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on
- VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing
- water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess
- pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves
- sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion
Selection pitfalls — read before you substitute
- No locking device means shaft preparation is everything for 1726310-B-2RS1-VP274: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.
- The 50x110 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.
- 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 61.8/38 kN figures belong specifically to 1726310B-2RS1/VP274; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records.
Frequently asked questions
What are the dimensions and catalogue data of 1726310-B-2RS1-VP274?
Boundary dimensions: bore 50 mm, sphered OD 110 mm, overall width 27 mm; weight 1000 g. Loads: dynamic 61.8 kN, static 38 kN, fatigue 1.6 kN; the only published speed is the 4,300 r/min limiting value.
What does the designation 1726310B-2RS1/VP274 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 10 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 50 mm (code 10 x 5) bore. the B-2RS1/VP274 designation combines outer-ring lubrication holes (B) with nitrile contact seals each side (VP274) — the sealed, re-lubricatable execution of the 172 range.
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.