How To Fix Stripped Bushing/Gear French Movement

[expeditionhiker]

Hi, this gear is on the chime side, it is the fist gear after the winding gear. I don't know if this gear was connected with a special bushing, if so are they available to buy? If I braze it back together would it be strong enough? This is off a Japy crystal regulator. Is there a name for this gear and or bushing? Thanks for any help.

 

[R. Croswell]

Hi, this gear is on the chime side, it is the fist gear after the winding gear. I don't know if this gear was connected with a special bushing, if so are they available to buy? If I braze it back together would it be strong enough? This is off a Japy crystal regulator. Is there a name for this gear and or bushing? Thanks for any help.

You may have other issues. Note the bent tooth. That frequently is an indication that the mainspring "let go", busted, or a ratchet click failed.
This repair has been discussed here before. Something overloaded the 2nd (this) wheel and spun the pinion. French pinions are often hardened so attempting to restake the pinion (small gear) could fracture it. I think you should be able to use a small punch to stake the wheel between the leaves of the pinion forcing brass into the space between the leaves. This part is loaded pretty heavy so it must be tight. I would not solder it. You will also need to correct that damaged tooth. Depending on your skills and available tooling, one option would be to make a new wheel.

RC

 

[expeditionhiker]

thanks for seeing the bent tooth and your suggestions. It looks like the springs and clicks are all good. After cleaning I'll check for other damage.

 

[shutterbug]

Brazing is an option, but not an original repair technique. Also consider that high heat will soften the brass wheel.

 

[JTD]

thanks for seeing the bent tooth and your suggestions. It looks like the springs and clicks are all good. After cleaning I'll check for other damage.

There's another bent tooth up at the top of your photo (about 12 o'clock). That one's got a real hook on it.

JTD

 

[expeditionhiker]

I was able to cut/file 4 small notches in the brass gear along each spoke, flatten some brass stock for a tight fit and braze it all together. I bent a few teeth back into position with a flathead screwdriver. The pictures are during the procedure, not polished or completed, so it probably looks pretty ugly, and the arbor still needed to be polished. I disassembled movement and cleaned in UC, put back together, oiled and everything works. 1st time I've done such an extensive repair, best part was repair pretty much cost me $0 since I did not need to order any parts! Just a lot of time which was OK since this clock is for me. Thanks everyone for the help and suggestions.