WORKING TECHNIQUES
Make one or more cuts at or near the point of maximum tension. Make as many cuts of sufficient depth as necessary to reduce the tension and make the tree or branch break at the point of maximum tension.
Never cut straight through a tree or branch that is in tension!
If you must cut across tree/limb, make two to three cuts, one inch apart, one to two inches deep.
Continue to cut deeper until tree/limb bends and tension is released.
Cut tree/limb from outside the bend, after tension has been released.
How to avoid kickback
! | WARNING! Kickback can happen very |
suddenly and violently; kicking the chain | |
| saw, bar and chain back at the user. If |
| this happens when the chain is moving it |
| can cause very serious, even fatal |
| injuries. It is vital you understand what |
| causes kickback and that you can avoid |
| it by taking care and using the right |
| working technique. |
What is kickback?
The word kickback is used to describe the sudden reaction that causes the chain saw and bar to jump off an object when the upper quadrant of the tip of the bar, known as the kickback zone, touches an object.
Kickback always occurs in the cutting plane of the bar. Normally the chain saw and bar are thrown backwards and upwards towards the user. However, the chain saw may move in a different direction depending on the way it
was being used when the kickback zone of the bar touched the object.
Kickback only occurs if the kickback zone of the bar touches an object.
Limbing |
|
! | WARNING! A majority of kickback |
accidents occur during limbing. Do not | |
| use the kickback zone of the guide bar. |
| Be extremely cautious and avoid |
| contacting the log, other limbs or objects |
| with the nose of the guide bar. Be |
| extremely cautious of limbs under |
| tension. They can spring back toward |
| you and cause loss of control resulting |
| in injury. |
When limbing thick branches you should use the same approach as for cutting.
Cut difficult branches piece by piece.
Make sure that you can stand and move about safely. Work on the left side of the trunk. Work as close as possible to the chain saw for maximum control. If possible, let the weight of the chain saw rest on the trunk.
Keep the trunk between you and the chain saw as you move along the trunk.
Cutting the trunk into logs
See instructions under the heading Basic cutting
technique.
English – 33
