SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/home-yard-unplug-before-accessory-change

Before changing a power-tool blade or bit, what should you do first?

Disconnect the tool from power.

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  1. Increase its speed
  2. Hold the trigger halfway
  3. Disconnect it from power ✔

Why: A tool can start unexpectedly while an accessory is being changed. Disconnecting power removes that immediate startup path.

Huh, didn't know that: OSHA also says to disconnect tools before servicing and when they are not in use.

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References

Answer: Disconnect it from power. A tool can start unexpectedly while an accessory is being changed. Disconnecting power removes that immediate startup path.

  1. Power Tools, OSHA Construction eTool www.osha.gov/etools/construction/electrical-incidents/power-tools
    Disconnect tools when not in use, before servicing, and when changing accessories such as blades, bits, etc.
    Checked 2026-10-11.

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