What's the safest way to cut spiral duct with a grinder or sawzall?

Sawzall (Reciprocating Saw): Use a high-TPI (24 or 32 teeth per inch) metal blade. Secure the pipe so it doesn't spin, start your cut slowly, and let the blade do the work to prevent it from grabbing and kicking back. Grinder (Zip Cut Wheel): Faster and cleaner, but creates massive sparks. Always cut away from your body, ensure your guard is positioned correctly, and keep a firm two-handed grip so the wheel doesn't bind in the round curve and shatter.

[" Sawzall (Reciprocating Saw): Use a high-TPI (24 or 32 teeth per inch) metal blade. Secure the pipe so it doesn't spin, start your cut slowly, and let the blade do the work to prevent it from grabbing and kicking back. Grinder (Zip Cut Wheel): Faster and cleaner, but creates massive sparks. Always cut away from your body, ensure your guard is positioned correctly, and keep a firm two-handed grip so the wheel doesn't bind in the round curve and shatter."]

Stop if

• Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

Steps

• Sawzall (Reciprocating Saw): Use a high-TPI (24 or 32 teeth per inch) metal blade. Secure the pipe so it doesn't spin, start your cut slowly, and let the blade do the work to prevent...

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