SKF PHS25-1B21 ansi roller-chain sprocket (iso / din 8188). Machined-tooth roller-chain sprocket cut to the ANSI B29.1 / ISO 606 / DIN 8188 imperial roller chain series (25, 35, 40, 50, 60, 80, 100, 120, 140, 160, 180, 200, 240). Simplex, duplex or triplex tooth profile per fitted chain execution. Bored for QD taper bushing or pilot-bore. Hardened teeth standard.
| Type | ANSI roller-chain sprocket (ISO / DIN 8188) |
| Designation | SKF PHS25-1B21 |
| HS code | 8483.50 |
| Pitch | 6.35 mm |
| Outside diameter | 45.97 mm |
| Bore min | 6.35 mm |
| Bore max | 22.35 mm |
| Hub diameter | 35.05 mm |
| Width, total | 16 mm |
| Overall width, hub | 16 mm |
| Category | ANSI roller chain sprocket |
| Performance type | Simplex |
| Sprocket type | B |
| Standard | ANSI |
| Mounting arrangement | Rough stock bore |
| Material | Steel |
| Number of teeth | 21 |
| Product net weight | 0.119 kg |
| eClass code | 23-17-04-50 |
| UNSPSC code | 31171901 |
| 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.