chainbrake

plural chainbrakes

1. A safety device on a chainsaw that stops the chain during kickback.

   remove and clean the sprocket cover and chainbrake mechanism; […]

   1993, Lawrence, Trevor, Practical tree management : an arborists handbook, Inkata Press, page 92

   4 more examples

   The automatic chainbrake stops the chain immediately when the operator's left hand slips or is dislodged from the handle of the saw.

   1984, Heffernan, William, The Harvest reader, Harcourt Brace Jovanovich, page 467

   Buy a model with a chainbrake and make sure it stops the chain immediately.

   1988, Cavendish, Marshall, The Knack DIY Yearbook, page 127

   All saws have chainbrakes on these days that will stop a chain dead if your wrist is pushed against it (as in a kickback).

   2004, Earth Garden Magazine 130, Earth Garden Magazine, page 48

   Participants are usually asked to bring their own saws, and the course also covers basic saw maintenance, including proper filing techniques, maintaining safety features like chainbrakes, and carburetor adjustments.

   2004, McEvoy, Thomas J., Positive impact forestry : a sustainable approach to managing woodlands, Island Press, page 160