What is the purpose of the STIHL Quickstop Chain Brake?

• A. Designed to stop the chain in fractions of a second
• B. Increases engine power
• C. Requires manual lubrication
• D. Has no effect on chain speed

Answer: (A)

The key idea is safety: the Quickstop Chain Brake is a safety device designed to halt the chain in fractions of a second so you can limit injury if the bar kicks back or you momentarily lose control. It works by engaging a brake that stops the clutch drum, bringing the chain to a stop almost immediately. This rapid response is what makes the feature valuable—every fraction of a second counts when a moving chain could contact you. It can be activated manually by pushing the front hand guard forward, and on some models it can also trigger automatically in response to a kickback event. It doesn’t change engine power and isn’t about lubrication or chain speed when the brake isn’t engaged, so its purpose is specifically to stop the chain quickly for safety.