SKF SY1.1/4TF/VA228 pillow block ball bearing unit (ucp / uep / ukp). Two-bolt pillow-block cast-iron, SG-iron or thermoplastic housing pre-assembled with a spherical-outer-ring insert bearing. Absorbs shaft-to-support misalignment during assembly and in service. Standard shaft attachment is set-screw (UCP); eccentric locking collar (UEP) and adapter-sleeve (UKP) variants available. Dimensioned to ISO 3228 / DIN 626.
| Type | Pillow block ball bearing unit (UCP / UEP / UKP) |
| Designation | SKF SY1.1/4TF/VA228 |
| HS code | 8483.20 |
| Shaft diameter | 31.75 mm |
| Centre height (pillow block) | 47.6 mm |
| Housing overall width | 45 mm |
| Centre distance between bolt holes | 126 mm |
| Bearing width, total | 42.9 mm |
| Attachment bolt diameter | 12.7 mm |
| Basic dynamic load rating | 25.5 kN |
| Basic static load rating | 15.3 kN |
| Limiting speed | 160 r/min |
| Maximum operating temperature | 350 °C |
| Housing type | Pillow block, normal base |
| Number of bolt holes for fasteners | 2 |
| Fastening bolt hole type | Plain |
| Retaining feature, inner ring | Set screws |
| Bore type | Cylindrical |
| Rubber seating ring | Without |
| Material, housing | Cast iron |
| Material, bearing | High temperature steel |
| Coating | Zinc-coated housing and manganese phosphate coated bearing |
| Sealing, bearing | Shield and flinger on both sides |
| Sealing type | Non-contact |
| Sealing, unit | Without |
| Lubricant | Solid lubricant |
| Relubrication hole | Without |
| Grease fitting | Without |
| Product net weight | 1.55 kg |
| eClass code | 23-05-90-90 |
| UNSPSC code | 31171536 |
| Material | As declared by SKF designation suffix |
| Temperature range | Per SKF product data |
| Primary standard | SKF designation convention |
| MOQ | 1 |
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.