This episode applies concepts covered in the first video to grinding a tool.
Tom
Thanks Andy, hopefully they help out.
Although you are no doubt waiting for the metric version.
Tom
Great video Tom. You've inspired me to pay attention to the clearance angles and flat , rather than my usual that looks good enough. With a calibrated eye ball of course.
Thanks Greg.
Clearance angles on a V thread normally are good enough, but the flat requires close attention.
Tom
That was very nicely shown - excellent video
DaveH
Tom,
I SO much prefer your videos over the BoobleCain ones. I find that guy to be so annoying, and often WRONG.
Now a question: A 1/32" flat on the tip of the tool would be for a 4 TPI thread. Is that what you are making for a thread with that tool?
The formula for the flat at the root of an ANSI "UN" thread is .125 x P, or at least that what I've always used.
Here's an online calculator which seems to use a tolerance on that root flat of external threads, showing .1875 x P to (my recommendation of) .125 x P.
http://theoreticalmachinist.com/Threads_...erial.aspx
Hey Ken,
The flat should have been 1/8 pitch not 1/4 pitch. I thought it looked a bit large when I made the tool. Now how to edit the video...
Thanks for catching the error.
Tom
The new video is up and as an added bonus it's now available in HD. The mistake is corrected, now if I could just do something about the narrator.
Tom
why is it that the inserts that I have, have no flat on the point.
DA
