Introduction
Many Ansonia clocks feature decorative spelter figures or arms that support the pendulum assembly. Over time, these spelter components can crack or break, especially at thin or load‑bearing points. This guideshows how to repair a broken spelter arm using a precise drilling, pinning, and JB Weld method. This guide explains the exact steps used and how to achieve a strong, nearly invisible repair.
Why Spelter Breaks on Ansonia Clocks
Thin casting points
Arms and decorative extensions are often thin and prone to stress fractures.
Metal fatigue
Spelter becomes brittle with age, making breaks more common.
Previous repairs or stress
Old glue, solder, or impact damage weakens the structure.
Weight and movement vibration
Continuous pendulum motion can stress weak joints.
Handling during service
Removing the movement without proper support can strain the figure or arm.
The Repair Method Used
The owner performed a professional‑grade repair using a mechanical pin and epoxy reinforcement. This method restores strength far beyond what glue alone can provide.
1. Drilling alignment holes
A small hole was drilled into both sides of the broken spelter arm. The holes were aligned so the arm would return to its exact original position when reassembled.
2. Inserting a metal pin
A small metal pin was cut to length and inserted into the drilled holes. This pin acts as an internal reinforcement, preventing future breaks and ensuring perfect alignment.
3. Applying JB Weld
A small amount of JB Weld was used to secure the pin and bond the two spelter sections together. JB Weld is ideal for spelter because it adheres strongly and fills gaps.
4. Allowing full cure time
The repair was left to dry completely, ensuring maximum strength before finishing.
5. Sanding the joint
After curing, the joint was sanded with fine sandpaper to level the surface, followed by 000 steel wool to blend the repair seamlessly into the surrounding metal.
Result
The repaired arm was strong, stable, and the joint was no longer visible.
Step‑by‑Step Guide for Repeating This Repair
Step 1: Secure the clock
Use a movement stand or padded surface to prevent stress on the figure while working.
Step 2: Clean the break
Remove loose debris and old adhesive from both sides of the break.
Step 3: Drill pilot holes
Use a micro‑bit to drill shallow, centered holes in both broken sections.
Step 4: Fit the pin
Cut a small brass or steel pin to length and test‑fit for alignment.
Step 5: Apply JB Weld
Coat the pin lightly and apply a thin layer to the joint surfaces.
Step 6: Assemble and clamp
Press the pieces together and hold them in place until the epoxy sets.
Step 7: Sand and finish
Use fine sandpaper followed by 000 steel wool to blend the repair.
Troubleshooting Flowcharts
If the joint won’t align
Pin too long → Hole off‑center → Debris in hole → Mis‑drilled angle
If the repair feels weak
Pin too thin → JB Weld not cured → Poor surface prep → Spelter flaking
If the joint is visible
Insufficient sanding → JB Weld excess → Uneven casting → Missing finish coat
If the arm breaks again
Pin too short → Stress point not reinforced → Excess load → Casting defect
If the finish looks uneven
Steel wool not used → Sanding too coarse → Surface not cleaned before finishing
Common Mistakes to Avoid
Using glue alone
Adhesive without a pin will not hold long‑term on spelter.
Skipping alignment drilling
Misalignment ruins the appearance and function of the arm.
Over‑sanding
Too much sanding can flatten details in the casting.
Using oversized pins
Large pins can crack the spelter during insertion.
Rushing the cure time
JB Weld must fully harden before sanding or handling.
Checklist for Final Verification
• Pin fully seated
• JB Weld cured completely
• Joint aligned perfectly
• Surface smooth and blended
• Arm strong under light load
• No visible repair line
FAQs
Is pinning necessary?
Yes—spelter is brittle, and a pin dramatically increases strength.
Why use JB Weld?
It bonds well to spelter and fills gaps without shrinking.
Can the repair be made invisible?
Yes—proper sanding and blending make the joint disappear.
Will this hold long‑term?
With a properly sized pin and full cure time, the repair is very durable.
Does this method work on other Ansonia figures?
Yes—any spelter component with a clean break can be repaired this way.
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