Introduction
A faulty click spring can cause dangerous backspin, failed winding, or inconsistent power delivery in a mechanical clock. Whether the click won’t engage, slips under load, or fails to return fully, the issue must be corrected before the movement is wound again. This guide explains how click mechanisms work, how to diagnose the problem, and how to restore safe, reliable operation.
How the Click System Works
Click and ratchet interaction
The click locks into the ratchet wheel to prevent the mainspring from unwinding backward.
Click spring tension
The spring pushes the click into position and must provide firm, reliable pressure.
Safe winding
A healthy click system ensures the mainspring can be wound without slipping or backspin.
Common failure points
Weak springs, bent clicks, worn ratchet teeth, or incorrect alignment.
Importance of clean pivots
Power delivery depends on smooth train operation after the click is repaired.
Diagnosing Click Spring Problems
Click not returning fully
Indicates weak spring tension or incorrect spring shape.
Click slipping under load
Worn ratchet teeth or a bent click may prevent proper engagement.
Click spring out of position
Springs can shift during disassembly or cleaning.
Click binding
Debris, burrs, or incorrect pivot alignment can restrict movement.
Backspin during winding
A dangerous sign that the click is not locking securely.
How to Fix the Click Spring
Step 1: Let down all power
Fully release mainspring tension before touching the click or ratchet.
Step 2: Inspect the click
Check for bending, wear, or burrs that prevent clean engagement.
Step 3: Adjust or reshape the spring
Increase tension slightly so the click snaps firmly into the ratchet.
Step 4: Verify ratchet condition
Worn or rounded teeth must be corrected or replaced.
Step 5: Test under partial winding
Wind slowly and confirm the click locks securely at every tooth.
Troubleshooting Flowcharts
If the click won’t engage
Spring weak → Click bent → Ratchet worn → Spring misaligned
If the click slips during winding
Ratchet teeth worn → Click not seating → Spring too weak → Burrs on click
If the click binds
Debris → Bent pivot → Spring dragging → Click rubbing plate
If the movement runs weakly
Power loss → Dirty pivots → Worn bushings → Incorrect lubrication
If the escape train misbehaves
Check upper pivots → Check depthing → Check power → Check escapement alignment
Common Mistakes to Avoid
Over‑bending the spring
Too much tension causes binding or premature wear.
Oiling the click
Oil attracts dirt and reduces reliability—clicks should run dry.
Ignoring ratchet wear
Even minor rounding can cause dangerous slippage.
Testing with full power immediately
Always test with partial winding first.
Skipping power let‑down
Working on a loaded click is extremely dangerous.
Checklist for Final Verification
• Click engages firmly
• Spring tension correct
• Ratchet teeth clean and sharp
• No binding or drag
• Movement winds safely
• Train runs full duration
FAQs
Why does my click slip?
Usually due to weak spring tension or worn ratchet teeth.
Should I oil the click?
No—clicks must remain dry for reliable engagement.
Why does the click not return?
The spring is misaligned or too weak.
Can a click spring be reshaped?
Yes—small adjustments usually restore proper tension.
Is click repair beginner‑friendly?
Yes, as long as all power is safely let down first.
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