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Mistake & recovery · #020

Using the wrong drill bit material for the substrate (e.g., wood bit on metal)

1st YearTools & Equipment

Use HSS or cobalt bits for metal, wood spade or brad point for wood. Match the bit to the material every time — wrong bits wander, overheat, and break.

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Safer field move

Use HSS or cobalt bits for metal, wood spade or brad point for wood. Match the bit to the material every time — wrong bits wander, overheat, and break.

Ask Foreman

Can you verify this before I keep going? I’m looking at: Using the wrong drill bit material for the substrate (e.g., wood bit on metal). What’s the approved correction for this job?

Do not

Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.

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Related apprentice questions

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