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Many of us have experienced the pain of cross-threading;  careful as we try to be, sometimes things are just so unwieldy that cross-threading is inevitable.  With these thread-restoring files you may be able to restore those damaged or worn — external — threads.

We assume you just run the file around the threads repeatedly — tedious but manageable.  I’d be interested to try them out;  I’ve abandoned a number of fun junk projects because of damaged threads.

The files in the set pictured above, from Cooper Hand Tools, each fit multiple thread sizes:  One is metric, two are standard (odd and even?), and one works for pipe.  A single file runs up to $15, and the set runs $40 on Amazon.

Thread-Restoring File Set/Singles [Cooper Hand Tools]
Street Pricing [Google Products]
Via Amazon [What’s This?]

 

5 Responses to Salvage Mangled Threads

  1. Nick Carter says:

    These work well, and you basically just slowly file around to get the threas back to shape, using the existing threads to guide. You can achieve the same thing with a triangular file but it’s harder to keep the spacing right on severely damaged threads.

    These also work great as a poor man’s checkering file…

  2. Ernie says:

    I have a thread file made by Cal-Van that has 8 different thread pitches and I use it all the time. They’re great when you have damaged threads in the middle of a long bolt or threaded rod. Very effective and handy to have in your toolbox.

  3. Greg A. says:

    These things are great, I have used them for the ends of all thread after cutting it to restore the threads works quickly and like a charm

  4. Frank Townend says:

    Looks interesting and as Greg said they would be helpful after cutting. As it is now, before cutting I thread several nuts on the bolt/rod and run them off the end after cutting. This seems to do the trick for me.

  5. peter says:

    We use these at work quite frequently, they are great even if a bit slow. most useful when you have a very odd size and are not able to get a proper die. also they work better that a die when the end threads are damaged and a die would have trouble starting.

    I believe that the ones we use are made by Jaw manufacturing (http://www.jawco.com/page2.html) and are usually on sale in the monthly flyer from ENCO (http://www.use-enco.com) for about $7.00 a piece

    its money well spent the first time you have to use them to salvage an expensive part

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