OSHA requires a constant-pressure switch on most power tools; which tool is exempt from this requirement?

OSHA requires a constant-pressure switch on most power tools; which tool is exempt from this requirement?

• A. Percussion tools
• B. Routers
• C. Chain saws
• D. Circular saws

Answer: (B)

The main idea is that a constant-pressure (dead-man) switch is meant to ensure the tool stops quickly if you let go, reducing the chance of injury if your grip slips or you lose control. Routers are exempt because they typically use a simple on/off switch that can be left in the locked-on position for continuous operation, rather than a trigger that must be held down the whole time. In practice, routers are designed for longer, controlled passes with both hands on the tool, and the switch design means the OSHA constant-pressure requirement isn’t applied to them. Other tools usually rely on a trigger that requires ongoing pressure to keep running, so they fall under the constant-pressure rule.

The main idea is that a constant-pressure (dead-man) switch is meant to ensure the tool stops quickly if you let go, reducing the chance of injury if your grip slips or you lose control. Routers are exempt because they typically use a simple on/off switch that can be left in the locked-on position for continuous operation, rather than a trigger that must be held down the whole time. In practice, routers are designed for longer, controlled passes with both hands on the tool, and the switch design means the OSHA constant-pressure requirement isn’t applied to them. Other tools usually rely on a trigger that requires ongoing pressure to keep running, so they fall under the constant-pressure rule.