SKF PHFJ-4-1/2 qd (quick disconnect) bushing. Flanged split-taper bushing that clamps a QD-hub pulley, sprocket or coupling to a shaft using screws inserted from either side (forward-mount or reverse-mount). Standard series JA, SH, SDS, SD, SK, SF, E, F, J, M, N, P, S, W. De-facto industry standard.
| Type | QD (Quick Disconnect) bushing |
| Designation | SKF PHFJ-4-1/2 |
| HS code | 8483.50 |
| Width, total | 122.68 mm |
| Flange diameter | 184.2 mm |
| Flange thickness | 28.7 mm |
| Width, bushing seat | 80.77 mm |
| Bushing type | J |
| Category | QD bushings |
| Product net weight | 12.7 kg |
| eClass code | 23-05-19-01 |
| UNSPSC code | 31171605 |
| Material | As declared by SKF designation suffix |
| Temperature range | Per SKF product data |
| Primary standard | SKF designation convention (see description for governing ISO / DIN) |
| MOQ | 1 |
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.