Tubalcain demonstrates how to grind a 60 degree threading tool. Two methods–free hand & with a grinding jig.
Tubalcain demonstrates how to grind a 60 degree threading tool. Two methods–free hand & with a grinding jig.
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Very well done video explaining how to grind thread tooling. I am not a
machinist, and this explains the process very clearly. One question, it
seems that a tool used to cut 20 tpi should have a smaller radius at the
tip than one used to cut 60 tpi, If you were going to cut 20 or even 13
threads per inch, wouldn’t you put a larger radius on the tip? I don’t
think you would want a sharp point on the minor diameter.
Very nice. I would have milled the bottom side of the jig because I can’t
change the angle of the tool rest on my grinder.
Sir: Forgive me if I err in digging through memories more than 50 years
old. I recall a machine shop teacher telling us that those angled tool
holders spared us the chore of grinding a 20 degree back rake into turning
and facing bits.
I was NOT a good machinist and only too glad to get a mandatory class under
my belt.
Eli D.
I have watched a lot of your videos. I got a logan 10 inch lathe and have
been turning a lot of steel into chips. I have a little round tool for
making threads, and no matter wha I did, I could not make a good thread. I
gave up, and ground one. Night and day difference, the threads now are
acceptable, and they were horrible before. So thanks for what you do. You
explain thing better than anyone, I really appreciate it. Tom
Is it possible to purchase your machine shop series on dvd? If so can you
let me know the cost. Thank you and have a great day.
It took me forever to get it right in class! Wish I had a jig. lol
thanks for the refrance
Internal threading tool has a more severe rake angle or chip breaker
thanks gave you a thumbs up please return the favor
Also on the method I’m, using: A disc sander and a cross slide vice clamped
to the sander table and I just run it at an angle and push the tool into
the disc. (I have active water cooling on this sander – it’s for preparing
surfaces for microscope so active cooling, 12″ buffing and sanding wheels,
lapping compounds, nital bath at the finish, all without overheating that
destroys the surface crystals on the metal.)
Zero.
gr8t video thats a easy tool to grind hard one 4 me is the inside Threading
tool
Hello sir, i loved this video, i actually did this at work and it worked
great, anyways are you ok, you haven`t uploaded for a while and im a little
concerned, yours, Stewart
Great video sir! I’ve been looking for a simple jig to sharpen lathe tools.
Thanks!
Thank you for making the video.
Im 13th and I can do it
Da hat einer Ahnung was! Vorallem die Fachbegriffe wie “is ein bischen
anders”. Hochleistungsschnittstahl erleidet bei bestimmten Temperaturen
eine Gefügeveränderung, weil sie ursprünglich bei ca. 500-600 °C angelassen
wurden, und verliert so an Härte! Außer hier hat eine mehr Ahnung als
Doktoranden und Profs!
Say Hello to Jordan from Egypt !
Is there any difference in geometry for an inside threading tool?
@GK1918 I was having the same trouble using my I pad 2. I downloaded google
chrome and am using it for you tube videos rather than safari.
Thanks for the videos this has gave me a idea I have a radial arm saw and a
metal cutting disk hmmm. Keep up the great info Mr. Pete
I wonder how many 16 year old gamers are leaving their game long enough to
learn these valuable techniques? :o] O,,,
Mr Pete, this is a great working jig. I have never been able to grind a
nice looking threading tool until I made your jig. I ended up making 2 of
them, 5/16 and 3/8. Thanks for the valuable information.