A hand-tightened bit slips, visibly wobbles, or its tip runs off center when the drill turns.

A hand-tightened bit slips, visibly wobbles, or its tip runs 1. Center-lock, remove the pack, and reject a bent or damaged bit.

• FM-09: Fm 3 1 5

• root cause analysis
• tools needed
• step-by-step repair procedure
• diagrams
• exploded views
• post-repair checks

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