failure mode

FM-13: FM-13 THE DRILL GRINDS, KNOCKS, VIBRATES, OR HAS SPINDLE PLAY

FM-13 THE DRILL GRINDS, KNOCKS, VIBRATES, OR HAS SPINDLE PLAY

Diagnostic overview

FM-13 THE DRILL GRINDS, KNOCKS, VIBRATES, OR HAS SPINDLE PLAY

Likely Root Causes

  • Bit is bent, loose, or off-center
  • Chuck is loose, damaged, or contaminated
  • Spindle or front bearing is worn or bent
  • Gear or clutch teeth are chipped or dry
  • Housing, motor, or gearcase fasteners are loose or cracked

Quick Checks

  1. The empty chuck and a straight bit turn smoothly without play.

Related symptoms

  • The drill makes abnormal grinding or knocking, vibrates strongly, or the chuck and spindle have play.

    The drill makes abnormal grinding or knocking, vibrates 1. Center-lock, remove the pack and bit, and hand-turn the empty chuck.

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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