YSPAG-208 bearing: complete specifications & equivalents
The YSPAG-208 is a ISO 15 radial bearing sized 40 x 80 x 43.1 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 | 40 mm |
| Outer diameter D | 80 mm |
| Width B | 43.1 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 30.7 kN |
| Basic static load rating C0 | 19 kN |
| Fatigue load limit Pu | 0.8 kN |
| Limiting speed (mechanical) | 950 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 580 g |
| Manufacturer designation | YSPAG 208 |
| 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 & YSP2-series range
| Bore d | 1.575 in |
|---|---|
| Outer diameter D | 3.15 in |
| Width B | 1.697 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 20 mm |
| Smallest bore in YSP2-series | 25 mm |
| Largest outer diameter in YSP2-series | 120 mm |
| Width range across YSP2-series | 33.2–52.7 mm |
| Bore position in YSP2-series (smallest first) | 10 of 21 |
| Bore above smallest YSP2-series size | 15 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| YELAG-208 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 208 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. |
| YEL-208-2RF-VL065 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. |
| YEL-208-2F | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. |
| YSP-208-SB-2F | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 208 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. |
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 YSPAG-208 model number is decoded
Listed in SKF 17000 chapter 2, YSPAG 208 is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 40x80x43.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 40x80x43.1 mm (1.575x3.15x1.697 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 950 r/min; mass 580 g. Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSPAG 208 — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Load balance for documentation: C0 19 kN against C 30.7 kN gives a 0.619 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Pitch-diameter arithmetic: dm = (40+80)/2 = 60 mm; at the 950 r/min limiting speed the ball set runs at dn approx 0.57x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. The s1 26.2 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 950 r/min the mean diameter dm = 60 mm implies dn about 0.57x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Reuse note for YSPAG-208: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 40 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.
Typical equipment & failure modes
Common applications
- fan and blower positions sensitive to imbalance
- high-speed textile and processing rollers
- food and packaging conveyors
Known failure patterns
- puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve
- undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up
- pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves
- relubricated with incompatible grease that hardens the factory fill and drags the seals
- 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
- ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.
- The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 40 mm shaft.
- Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 43.1 mm-wide sleeve causes a local unclamped arc that later frets.
- Ordering discipline for the 40 mm size: the chapter lists several executions side by side (YSP2 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 YSPAG-208?
The catalogue envelope is 40x80x43.1 mm with a spherical outside surface; mass 580 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 950 r/min.
What does the designation YSPAG 208 mean?
reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery.
When should I choose YSP over YAR or YEL?
Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening.
What does SB mean in YSPAG 208?
SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package.
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.