Grapple repair. Tough customer.

[schor]

Search for 3d printer groups in your area, they seem to be all over the place. I bet they could make you a new gear faster than trying to find one in another toy to replace it, or make one yourself.

Found another problem. There's a cracked gear. If you look closely, you can see the crack in the 12 o'clock position. I turned a collar in an attempt to keep the gear from slipping on the shaft. It still slips. The aluminum collar did tighten it up a lot though. I still have to clean up the collar a bit too.

Anyone know what type of plastic these gears are made of? I'm thinking of trying bonding the gear to the shaft.

View attachment 63452

Thanks for looking!

 

[LEEQ]

knurling sounds like a good try with what you have. Good idea.

 

[DAN_IN_MN]

Check with a hobby shop for replacement gears. Good luck and a cute daughter.

This one came along a little late. :allgood:

Thanks!

 

[talkingmonkey]

Could you use a roll pin?

 

[DAN_IN_MN]

Could you use a roll pin?

The shaft is under .125. Might be a bit too small for a roll pin.

 

[DAN_IN_MN]

WELL, why did I think that there'd be only one broken gear? I found two more..


Here the finial trimming of the holding ring of the first gear fix.



Here's one of the two broken gears. I'm going to make a holding ring for this one too.

This one will have to have the gear turned down a bit as clearances are tight.
Sorry, it's a bit blurry, but I think you can make out the crack in the red oval.


It took a bit of designing to make this thing! I think this was before CAD too!

 

[churchjw]

I bet the designers never thought it would be running for 35+ years. LOL After your done you will probably get another 50 years out of it and it will be ready for the space program.

Jeff