SKF PHS08B-1DSTB21 metric roller-chain sprocket (iso / din 8187). Machined-tooth roller-chain sprocket cut to the ISO 606 / DIN 8187 metric roller chain series (04B, 05B, 06B, 08B, 10B, 12B, 16B, 20B, 24B). Simplex, duplex or triplex tooth profile per fitted chain execution. Bored for taper-lock bushing or pilot-bore. Hardened teeth (case-hardened C45E) standard.
| Type | Metric roller-chain sprocket (ISO / DIN 8187) |
| Designation | SKF PHS08B-1DSTB21 |
| HS code | 8483.50 |
| Pitch | 12.7 mm |
| Pitch diameter | 85.22 mm |
| Bore min | 14 mm |
| Bore max | 42 mm |
| Hub diameter | 70 mm |
| Width, total | 35.7 mm |
| Length through bore | 38 mm |
| Category | Metric roller chain sprocket |
| Performance type | Double simplex |
| Sprocket type | A |
| Standard | BS |
| Mounting arrangement | Taper bush |
| Bushing number | 1615 |
| Material | Steel |
| Number of teeth | 21 |
| Product net weight | 0.549 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.