Power Plastic non-metallic H78 shear pin sprockets do not rust or seize like metallic drive sprockets are prone to do. Lightweight and easy to assemble, these drive sprockets have a strong lubricated green nylon shear pin hub and replaceable UHMW-PE or Nylon 6 bolt-on sprocket teeth. Steel shear pins can be provided and sized for torque requirements. To be used in conjunction with PPC NMH78 drive chain and driven sprockets, Power Plastics H78 drive sprockets prevent damage to the collector chain and flights during overload conditions. Also available in trip cam design, jaw clutch design, and cast iron construction options. Contact Power Plastics for more information

| P/N | Number of Teeth | Pitch Dia | Max. Bore | LTB | O.D. Hub |
|---|---|---|---|---|---|
| WTS78-10SP | 10 | 8.44" | 13.39" | 4-3/4" | 3-1/4" |
| WTS78-11SP | 11 | 9.26" | 17.09" | 4-3/4" | 3-15/16" |
| WTS78-12SP | 12 | 10.08" | 18.95" | 4-3/4" | 3-15/16" |
| WTS78-13SP | 13 | 10.90" | 20.83" | 4-3/4" | 3-15/16" |
© 2026 Power Plastics. All Rights Reserved.