failure mode
FM-09: FM-09 A SECURED BIT SLIPS, WOBBLES, OR RUNS OUT AT NO LOAD
FM-09 A SECURED BIT SLIPS, WOBBLES, OR RUNS OUT AT NO LOAD
Diagnostic overview
FM-09 A SECURED BIT SLIPS, WOBBLES, OR RUNS OUT AT NO LOAD
Likely Root Causes
- Bit is bent, cracked, worn, or the wrong shank size
- Bit is off-center between the jaws
- Chuck is not hand-tightened firmly
- Jaw faces are dirty, chipped, or uneven
- Chuck, spindle, or front bearing is bent or loose
Quick Checks
- Known-straight round-shank bit; soft dry brush.
Related symptoms
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.
Included in the full manual
- root cause analysis
- tools needed
- step-by-step repair procedure
- diagrams
- exploded views
- post-repair checks
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