Constant-Pressure Switches and Controls
Hand-held power tools must be equipped with a constant-pressure switch or control that shuts off the power when pressure is released.
This belt sander has a constant-control switch.
Power tools with this requirement include:
- drills
- tappers
- fastener drivers
- horizontal, vertical, and angle grinders with wheels more than 2 inches (5.08 centimeters) in diameter
- disc sanders with discs greater than 2 inches (5.08 centimeters)
- belt sanders
- reciprocating saws
- saber saws
- scroll saws, and jigsaws with blade shanks greater than 1/4-inch (0.63 centimeters) wide
- circular saws having a blade diameter greater than 2 inches (5.08 centimeters)
- chain saws
- percussion tools with no means of holding accessories securely
- other similar tools
These tools also may be equipped with a "lock-on" control, if it allows the worker to also shut off the control in a single motion using the same finger or fingers.
Knowledge Check Choose the best answer for the question.
3-4. Hand-held power tools must be equipped with a _____.
You forgot to answer the question!