Threading Basics

I only use HM drills with through the tool coolant, and then chamfering, then rolltapping the tread.

What they don't say is that rolltapping results in a stronger tread, because you forge the metal structure, instead of cutting it away. also perfect for CNC milling because it doesn't produce chips.

Fully synchronized tapping as well. (tap is rigid in the toolholder) means the Z axis servo is 'slave' to the position of the spindle. So the spindle can rev down and up at the end of the hole.

the worst part is handtaping
i hate it and my favorite taps are spiralflute
for handtaping i use tapper once than spiralflute or bottom tap for finish
im still new on these only a year experience

HELP! is it possible to tap a thread by hand?

yes, its easy

yea man

yep sure is, its tricky though, remember to reverse the rotation every revolution or 2, it breaks the chips created, helps to give a more defined thread.

simple formula for speed and feeds for standard taps(non metric) feed rate= 10. spindle speed=10(TPI)
example:1/2-13 tapped hole Feed rate=10. spindle speed=130 RPM's
( Mills Only and rigid tapping) This works really well and is VERY conservative. You can increase things if you are comfortable with results. (recommend OSG modified bottoming taps. they seem to work the best for me.) Good luck and happy tapping

oh how i hate tapping on the 25+ year old CNC mills I have to deal with.

lol cool cool

nice video