This tooth profile allows for the sprockets to seat the chain properly and run inside a coupling cover. It is always recommended to use an aluminum coupling chain cover when running roller chain couplings for safety, performance, and durability reasons. We standardly stock plain-bore, finished bore, and bushed style coupling sprockets.
| sprocket Size | Stock Bore | Tooth Count | Hub Diameter (A) | Recommended Maximum RPM | Weight |
|---|---|---|---|---|---|
| 8018 | 1-1/8" | 18 | 4.563" | 2000 | 5.3 LBS |
| 8018R | R | 18 | 4.563" | 2000 | 5.3 LBS |
| 8018SF | SF | 18 | 4.563" | 2000 | 5.3 LBS |
| 8018SK | SK | 18 | 4.563" | 2000 | 5.3 LBS |
| 8020 | 2-5/8" | 20 | 5.375" | 2000 | 5.9 LBS |
| 8020TLH | 1-1/2" | 20 | 5.375" | 2000 | 5.9 LBS |
| 8020TLH | 3020 | 20 | 5.375" | 2000 | 5.9 LBS |
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