Operating Controls and Switches
Positive "On-Off", Constant Pressure, and "Lock-On" Controls
The following hand-held power tools must be equipped with either a positive "on-off" control switch, a constant pressure switch or a "lock-on" control:
- disc sanders with discs 2 inches (5.08 centimeters) or less in diameter
- grinders with wheels 2 inches (5.08 centimeters) or less in diameter
- platen sanders, routers, planers, laminate trimmers, nibblers, shears, and scroll saws
- jigsaws, saber and scroll saws with blade shanks a nominal 1/4-inch (6.35 millimeters) or less in diameter
What must this electric planer be equipped with?
Constant pressure control switches are preferred for use with power tools because they offer the most safety. They prevent accidental activation and reduce the risk (probability and severity) of injury if the user loses control or needs to quickly stop the tool.
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2-4. What is the preferred power tool control device?
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