I had never owned, much less used, a spiral flute tap until now. I bought a 1/4-28 spiral flute tap for a project I am working on. I grew weary of the twisty turns hand taps and wanted a tap better suited to use with my new hand tapping device for the lathe.
Mind blown!
Drilled a #1 pilot hole an inch deep and went to work with the tap. A little cutting oil and 65 rpm. OMG! It was like I was doing nothing at all. No real torque on the tapping device. Tap just makes a couple long chips coming out of the hole as it keeps going deeper. I did back the tap out once just to look but then drove it to full depth. Might have taken me a minute to tap the hole nice and straight.
I really like this spiral flute tap for a blind hole. How to see how my new spiral point 10-32 tap does on some thru holes.
Mind blown!
Drilled a #1 pilot hole an inch deep and went to work with the tap. A little cutting oil and 65 rpm. OMG! It was like I was doing nothing at all. No real torque on the tapping device. Tap just makes a couple long chips coming out of the hole as it keeps going deeper. I did back the tap out once just to look but then drove it to full depth. Might have taken me a minute to tap the hole nice and straight.
I really like this spiral flute tap for a blind hole. How to see how my new spiral point 10-32 tap does on some thru holes.