Pendulum bob repair

[lperzy]

I have a pinwheel regulator with a very dented big pendulum bob can these be restored

 

[doc_fields]

On some of the bobs I have done, you can get a small screw driver under the brass where it folds over on the weight. Then carefully, like rolling a tire on and off a rim, you can work your way around, gently prying up and rolling the brass away with the round shank of a small screwdriver. Once off, you can work the dent out with some wood shaped to the dent somewhat, or use a dapping block like you see and can get at Harbor Freight. Putting it back on would be in reverse, using a light brass hammer to help fold the brass metal back over the weight. Another method, if the brass is smooth, is to use a suction cup to help work it out. Wet the cup, (sized for the dent), with a light oil or grease to help hold suction. Sometimes there's not much you can do except to live with it or find a reproduction one at a suppliers......doc

 

[Scottie-TX]

ABSolutely.
As the DOC has counselled - the brass skin is very thin. Work carefully - slowly. You'll be able to work out 99% of the dents. You still can get it closer and work out more with tedious rubbing down, starting with about 320 grit wet 'n dry from the viewed side. Yeah. You can do that. WELL worth the effort.

 

[Jim DeRosier]

After seeing what a musical instrument repairer did with a dropped trumpet. I provided the challenge of a dented pendulum bob. How they did it, they didn't share but the results were satisfactory. It was a long time ago and as I recall cost was fairly reasonable.

Jim DeRosier
Empire Clock, Inc.