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Tool Talk Discussion Forum

Machining cork

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Hendrik

03-06-2004 01:24:34




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In Farmalls, and maybe other tractors, threaded holes for mounting implements where factory filled with corks to protect the threads. I would like to restore my Farmall similarly (becoming a purist...). Do have many wine bottle corks. Do you know of a method of making them the right diameter?
Your help will be highly appreciated. Hendrik




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Hendrik

03-08-2004 03:20:07




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 Re: Machining cork in reply to Hendrik, 03-06-2004 01:24:34  
Thanks to all who responded. Like the punch ideas best but machining probably gives better control of shape and size. Cutting, even with a very sharp knife, gave poor results at best.
Never knew corks are still being used for plugging holes.
Hendrik



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Mike Holloway

03-07-2004 04:31:03




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 Re: Machining cork in reply to Hendrik, 03-06-2004 01:24:34  
Hello Hendrik,

Here is a simple way to make your cork plugs. Fine a old radio with a telescoping antenna. The antenna is made with different sizes of thin wall brass tubes. Pick the diameter you need and sharpen one end on the outside edge. You can rotate and push this "cutter" right thru a cork. Then take a rod and push your "plug" out of the tube. This is a great way to make holes in any type of gaskets, cork, paper, rubber, etc. Mike

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markct

03-06-2004 15:37:55




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 Re: Machining cork in reply to Hendrik, 03-06-2004 01:24:34  
well i am pretty darn cheap, but i think i would just go to the hardware store and buy a few corks before i would go thru the trouble of machining them down, but thats just me



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LesWV

03-06-2004 15:22:07




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 Re: Machining cork in reply to Hendrik, 03-06-2004 01:24:34  
Hendrik
That process is still used by powder coaters and Machine painters. The cork is used to keep the coating from entering the Bolt Threads, Oil holes etc. It saves time from having to go back and clean the holes or tapping the threads over once the part is painted or coated. Cork seals the holes very nicely and yet it will not expand or contract when heated. And being 99.9% chemical resistent and cheap to buy, it makes the best choice to use for such work.

If you need to resize the cork. Just using a Rasp, 80 or 90 grit sand paper will get the job done nicely. A company called Janns Netcraft sales Fishing rod building tools. For what you want to use the cork for. You will want something that will hold the cork from the outside edges and not put a hole in it. Look at the Rubber padded chuck used to hold fishing rod blanks for wrapping and working cork handles. It may be something that interest you. Look under Rod Building Tools.

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Dieselrider

03-06-2004 04:19:00




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 Re: Machining cork in reply to Hendrik, 03-06-2004 01:24:34  
they can be turned on a lathe, we did one to make a brake for our Tree milling machine.



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jeff

03-06-2004 10:35:16




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 Re: Re: Machining cork in reply to Dieselrider, 03-06-2004 04:19:00  
You can make a MINI lathe with a cordless drill and a dremel tool. Put a long thin sewing needle into the cork and make sure it is running true. Chuck the needle in the drill so you can turn it really slowly or faster. You need to feel this out. Use a stone on the dremel and make like a minny tool shop.With a little practice you should get a pretty good result. jeff



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