Thread Restoring Files ~ Fixing Auger Bit Pilot Threads ~ by Old Sneelock’s Workshop

Thread Restoring Files ~ Fixing Auger Bit Pilot Threads ~ by Old Sneelock’s Workshop


Hi I’m Old Sneelock. Welcome to another
episode of Old Sneelock’s Workshop Some of you have asked about thread
restoring files. Well this is a thread restoring file. Made by the general company. Made in USA. So it’s a obviously a fairly old file. I’ve had it in the drawer for, I don’t
know, years. Never really needed it and never got it out to do anything with it. So for this video I actually pulled it
out, opened up the package, which had never been opened, and i’m going to show you
how it works on sharpening the lead screw on an auger bit. Auger bits, if
nothing else, are very old. You don’t find very many of them brand new anymore. You can still buy them but most people come up with a auger bit that’s
been around a few hundred years. The thread restoring file has a series of
different threads on it. And what I’m looking for is a thread
that matches the pitch or the number of threads per inch that
this lead screw has. This one has 12 threads per inch. Another way to do it is to take a scale,
and take a marked distance on the thread This…. This thread is a half inch long. And then
count the number of threads in that half inch 123456 123456. That tells me if there are six threads
in a half inch there’s 12 threads in a whole inch. That makes it this part of
the file which is 12 threads per inch is the one I want to use. And you just rest
the file on the threads and run it against. Now the shape of the thread is
already in the file. Another thing you want to do is, there’s an
angle that the file has to ride at. To follow that thread i want to
match the angle of the thread. I’ve got a 12 threads per inch. Set that
part of the file on the top of it. Hold it in the proper angle and just run
it back and forth. Now if you have a really badly damaged thread, and this one isn’t badly
damaged at all, it’s just a little dull, Then you want to start on a section
that’s still good and work your way towards the section that is bad. You want to roll the file around so that
you’re not just filing a flat in the threads. The point of the exercise is to have it
so that the thread is rounded with good sharp edges on all the threads. Now while I’m working on this auger bit I’m being careful of those edges. This hasn’t been sharpened yet, but they’re still sharp enough to cut you. And because this file doesn’t have a
handle, which would be a good project for me to do, I’m going to wear a glove so it doesn’t dig into the palm of my
hand. When you pick this up you want to make
sure you get the 12 thread per inch section of the file on the part that you
want to do the cutting with. It’s easy to pick it up get out of rotation end up cutting the
wrong thread. You want to check the thread every once in a while to make sure
everything’s going good. Now if you run across one thread that is really screwed up you can take a three-cornered file and
carefully go along that thread. You want to follow the pattern of the thread best
you can because you don’t want to end up with this file going off one side or
the other because it’ll make the thread out of shape. Once you’ve got that bad part taken care
of then you go back to your thread file. The thread file is going to use one
thread to track the other. And it’s going to hold the angles right. Now we dressed down the threads on this
auger bit. We’ll see how it cuts. That’s doing a good job of pulling the bit. The bit itself is as dull as a butter knife.
That thread is pulling it right on in. If you have any suggestions for a new video, questions about today’s video, or any of the other videos on the channel just
drop a note in the comments below You know I read them all. Thanks for
watching (Life of Riley ~ music)

8 thoughts on “Thread Restoring Files ~ Fixing Auger Bit Pilot Threads ~ by Old Sneelock’s Workshop

  1. Nice video and very informative. Sometimes you just don't have the right die and the file will save the day.

  2. Glad you're up and about and hope everything is healing up. Blast it! I'd REALLY like to know where my thread file went. I suppose I'll have to break down and get another. I think mine was a Blackhawk but it was a handy thing for sombody like me with no taps or dies. Now to run another one down. HEAL Unc!

  3. Thanks for showing that I never knew how there was a file or even if they were filed. How hard is it it to find one of those files nowadays? That was just cool kinda made my day

  4. I really enjoyed the video. I have a few of those files but I've never used them. I usually just use a die which I know isn't recommended but it has worked for the times I've needed to fix some thread. I also have a thread restoring set that I'll be using from now on. I have the files if needed.

  5. Thanks for the info.  I found one and the thread file works like a champ.  I bought one years ago but it seems to have been misplaced or it walked off.  My tools seem to have a life of their own.  You can still find the thread files.

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