failure mode

FM-16: FM-16 BIT WILL NOT RELEASE, OR A SHORT OR BROKEN BIT IS TRAPPED

The chuck collar pulls but the bit will not come out, or a short or broken bit piece is recessed inside the chuck.

Diagnostic overview

The chuck collar pulls but the bit will not come out, or a short or broken bit piece is recessed inside the chuck.

Likely Root Causes

  • Bit is shorter than 2 inches and sits too deep
  • Shank is burred, twisted, or impact-swaged
  • Detent remains loaded by side pressure
  • Collar, ball, or spring is damaged

Quick Checks

  1. The old bit is removed safely and a correct replacement locks and releases normally.

Repair Preview

1.

This is a preview of the troubleshooting guidance included in the full repair manual.

Common Fixes

  • Eye protection

Related symptoms

  • The collar pulls, but the bit will not come out, or a short/broken piece is recessed in the chuck.

    The collar pulls, but the bit will not come out, or a 1. Remove the pack; point the nose down; hold the collar open and pull only a

Included in the full manual

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

Public pages show a preview only. Purchase the full manual to download complete repair steps, diagrams, and verification procedures.

FixBeforeBuy

Trusted repair guides, error codes, symptoms, and manuals before you replace your equipment.

Navigation

For technicians

Need the full step-by-step manual? Purchase securely on FixBeforeBuy and download your PDF after Stripe payment.

© 2026 FixBeforeBuy. Repair smarter before you buy.