Author Topic: Ring pin removal replacement relocating  (Read 104 times)

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Offline Cut4fun

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Ring pin removal replacement relocating
« on: May 17, 2015, 10:08:19 am »
Ring pin removal replacement relocating

I think it was Adam  @aclarke   that had told of doing this on Racesaws back in the day.

I am just wondering on how to remove and replace one or relocate if needed.

Thinking it was said using small drill bits for ring pins in pistons.
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Offline 660magnum

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Re: Ring pin removal replacement relocating
« Reply #1 on: May 17, 2015, 11:08:44 am »
In most model airplane engines the ring pin is vertical down through the piston.
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Offline aclarke

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Re: Ring pin removal replacement relocating
« Reply #2 on: May 17, 2015, 12:37:40 pm »
You can cut the old pin out easily with the proper diameter carbide end mill or possibly a  drill press if care is taken.  Easier to go through the top of the piston and peen the hole over gently. I've used wire/numbered drill bit shanks as the locator pin. 
The pin placement needs to be done carefully and the ring ends will likely need to be re-profiled with a file of diamond burr as the profile of the locating pin is different now. Make sure the ring will completely collapse in the ring land

Offline Cut4fun .

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Re: Ring pin removal replacement relocating
« Reply #3 on: May 17, 2015, 01:14:49 pm »
Thanks for info you two. :)
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Offline JohnG28

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Re: Ring pin removal replacement relocating
« Reply #4 on: May 18, 2015, 11:05:20 pm »
You would place the ring pin in a hole drilled vertically down? Then use a small drill bit into the hole as the pin? Just trying to make sure I have what you mean correct. Probably not going to need it anytime soon but I appreciate the info.

 

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