Introduction
Click springs are essential for safe winding and power retention in both spring-driven and weight-driven clocks. When a click spring breaks loose or must be replaced, it must be reattached securely to prevent catastrophic failure. This guide explains how to reattach a click spring to a wheel, how to control mainspring power safely, and how to test the repair on a movement stand.
Understanding the Click and Click Spring
What the click does
The click prevents the wheel from unwinding backward when the clock is wound.
Role of the click spring
The spring holds the click firmly against the ratchet teeth.
Why secure attachment matters
A loose or missing click spring can cause sudden mainspring release and major damage.
Common attachment methods
Riveting, staking, or using a tab-and-hole design depending on the wheel style.
When replacement is needed
Springs that are bent, cracked, or fatigued must be replaced, not reshaped.
Safety First: Control the Power
Let down the mainspring
Use a let down tool to release all stored power before removing or reattaching the click spring.
Secure the movement
Place the movement on a stable surface or movement stand before working.
Inspect the ratchet wheel
Check for worn or “scooped” teeth that may require repair or replacement.
Check the click pivot
Ensure the click moves freely and is not binding.
Verify the escape wheel is protected
Sudden power release can damage the escape wheel—confirm all power is fully let down.
How to Reattach the Click Spring
Step 1: Identify the original mounting points
Most wheels have small holes, tabs, or rivet points where the spring was originally attached.
Step 2: Clean the mounting area
Remove dirt and old metal fragments to ensure a solid connection.
Step 3: Position the spring
Align the spring so it applies proper tension to the click without excessive force.
Step 4: Rivet or stake the spring
Use a staking set or small rivet to secure the spring firmly to the wheel.
Step 5: Test the click action
The click should snap firmly into place and hold against backward rotation.
Testing the Repair
Mount the movement on a stand
A movement stand provides visibility and stability for testing.
Apply slight winding pressure
Turn the arbor gently to confirm the click holds securely.
Check for smooth ratchet action
The wheel should advance cleanly without hesitation.
Inspect the escape wheel
Ensure no accidental power release occurred during repair.
Wind partially and observe
Verify the click spring maintains proper tension throughout the winding arc.
Troubleshooting Flowcharts
If the click doesn’t hold
Spring tension too weak → Rivet loose → Click worn → Ratchet teeth damaged
If the click is too stiff
Spring tension too strong → Spring misaligned → Click pivot binding
If the wheel binds
Rivet protruding → Spring rubbing → Click misaligned
If the movement releases power suddenly
Click not engaging → Spring detached → Ratchet tooth failure
If winding feels rough
Check ratchet teeth → Check click pivot → Check spring alignment
Common Mistakes to Avoid
Not letting down the mainspring
This is the most dangerous mistake—always release power first.
Using oversized rivets
They distort the wheel and cause binding.
Over-tensioning the spring
Too much force causes premature wear and difficult winding.
Ignoring worn ratchet teeth
Damaged teeth must be repaired or replaced.
Testing without a movement stand
Harder to diagnose click and wheel issues.
Checklist for Final Verification
• Spring securely attached
• Click engages firmly
• Ratchet teeth clean and even
• Escape wheel protected
• Movement tested on stand
• Winding smooth and safe
FAQs
Why did my click spring come loose?
Wear, metal fatigue, or a failed rivet are common causes.
Do I need a let down tool?
Yes—safe mainspring control is essential.
Should I replace the click spring?
Replace it if bent, cracked, or weakened.
Can I test the repair without a movement stand?
Possible, but a stand makes diagnosis far easier.
Is the wheel ruined if the rivet hole is worn?
No—holes can often be repaired or relocated.
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