PDFWAC 296-807-11005
Make sure switches are safe.
(1) You must make sure the operating switch is located in a position that makes it difficult to accidentally operate the tool.
(2) You must use the correct operating switch.
(a) Make sure hand-held gasoline-powered chain saws have a constant pressure throttle control that will shut off power to the chain when the pressure is released.
(b) Use a constant pressure switch that will shut off the power when the switch is released to turn on or operate any hand-held power tool.
Exemptions:
Some tools can use a lock-on feature with the constant pressure switch if the lock-on feature can be turned off with a single motion of the same finger(s) that turned it on. You can use a lock-on feature with these hand-held tools:
1. Drills;
2. Tappers;
3. Fastener drivers;
4. Grinders using a wheel greater than two inches in diameter;
5. Disc sanders;
6. Belt sanders;
7. Reciprocating saws;
8. Saber, scroll and jig saws using a blade with a shank width greater than one-quarter inch;
9. Other similarly operating powered tools.
Exemptions:
You can use a positive "on-off" switch with these hand-held tools:
1. Platen sanders;
2. Grinders using a wheel two inches or less in diameter;
3. Routers;
4. Planers;
5. Laminate trimmers;
6. Nibblers;
7. Shears;
8. Saber, scroll, and jig saws using a blade with a shank width of one-quarter inch (± .05 inch) or less.
Note: | The shank width of saber, scroll and jig saw blades is measured at the narrowest point on the blade shank. |