SKF UC308 insert bearing (yar / yet / ysa / yel). Spherical-outer-ring insert ball bearing suited to drop-in mounting in a pillow-block, flanged, take-up or tapped-base housing. Set-screw (YAR), eccentric locking collar (YET), adapter-sleeve (YSA), or grub-screw double-lock (YEL) shaft attachment per suffix. Sealed for life with grease; regreasable variants add a lubrication nipple to the outer ring. Shaft bore diameter 40 mm, encoded by the SKF designation.
| Type | Insert bearing (YAR / YET / YSA / YEL) |
| Designation | SKF UC308 |
| HS code | 8482.10 |
| Shaft bore | 40 mm |
| Shaft diameter | 40 mm |
| Bore diameter | 40 mm |
| Outside diameter | 90 mm |
| Width, total | 52 mm |
| Width, inner ring | 52 mm |
| Width, outer ring | 25 mm |
| Basic dynamic load rating | 41 kN |
| Basic static load rating | 24 kN |
| Limiting speed | 4200 r/min |
| Note | Limiting speed with shaft tolerance h6 |
| Retaining feature, inner ring | Set screws |
| Bore type | Cylindrical |
| Rolling elements | Balls |
| Outer ring type | Spherical |
| Inner ring extension | On both sides |
| Cage | Sheet metal |
| Rubber seating ring | Without |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Seal and flinger on both sides |
| Sealing type | Contact, standard |
| Lubricant | Grease |
| Relubrication feature | With |
| Product net weight | 0.96 kg |
| eClass code | 23-05-16-02 |
| UNSPSC code | 31171536 |
| Material | As declared by SKF designation suffix |
| Temperature range | Per SKF product data |
| Primary standard | SKF designation convention (see description for governing ISO / DIN) |
| Dimensions | Shaft bore 40 mm |
| MOQ | 1 |
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.