There are a number of safety aspects to consider when operating a chainsaw. Here is an overview of the safety features on Jonsered chainsaws.
1. Chain brake
The greatest hazard when working with a chainsaw is if the saw kicks back. Kickback can happen if something contacts the upper quadrant of the tip of the bar, or if you try to cut with that same quadrant (the “kickback sector”). The bar tip will then try to climb upwards, and the saw will be thrown backwards by the force of the rotating chain.
You should always make sure the bar tip does not contact anything, and never try to cut with the kickback sector of the bar.
This is why the chain brake is an important safety feature of the chainsaw. If activated, it can stop the chain in a fraction of a second in the case of a kickback. The chain brake can be triggered in two ways on all Jonsered saws: either by the motion of the saw during kickback, or if the wrist of your left hand strikes the kickback guard.
2. Chain catcher
If the saw chain is not maintained properly it may jump off or break. The chain catcher is designed to protect the operator by stopping the chain from flying backwards.
3. Right hand guard
Designed to protect your fingers if the chain jumps off or breaks.
4. Throttle lock
Prevents accidental throttle operation. As an additional safety feature you must activate the throttle lock to operate the throttle.
5. Stop button
Conveniently positioned so you can stop the engine quickly.