81X Lumber Chain Sprocket
When it comes to Engineer-class 81X sprockets there are four standard configurations. A-Plate, B-hub, C-hub, and split sprockets. However, we also supply idler sprockets that use bearings or bronze bushings depending on the sprocket size and application. Below is a chart that shows the standard tooth-counts for 81x chain sprockets. s
| Item # | No. Teeth | Stock Bore | Pitch Diameter | Hub Diameters (A/B) | Style |
| 81XA8 | 8 | 0.938 in | N/A | N/A | Type A |
| 81XA9 | 9 | 1.250 in | N/A | N/A | Type A |
| 81XA10 | 10 | 1.250 in | N/A | N/A | Type A |
| 81XA11 | 11 | 1.250 in | N/A | N/A | Type A |
| 81XA12 | 12 | 1.250 in | N/A | N/A | Type A |
| 81XC8 | 8 | 0.938 in | 6.818 in | 4.750/4.500 in | Type C |
| 81XC9 | 9 | 1.250 in | 7.628 in | 5.250/5.000 in | Type C |
| 81XC10 | 10 | 1.250 in | 8.443 in | 5.250/5.000 in | Type C |
| 81XC11 | 11 | 1.250 in | 9.261 in | 5.250/5.000 in | Type C |
| 81XC12 | 12 | 1.250 in | 10.080 in |
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