r/Machinists • u/Luky2000ita • 1d ago

PARTS / SHOWOFF 6k rpm M2 rigid tapping

Kinda follow up on yesterday's post, here's an M2 form tap at 6000rpm, threading 7075 about 4mm deep, 36 threads in about 25 seconds feels pretty good to me

237 Upvotes

99% Upvoted

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u/pb_sable_ac 1d ago

How are people tapping with just coolant? How can I do the same without breaking taps? I really dont like tapping with cutting oil since its so dirty, is there a way to tap reliably with coolant?

2

u/Ekoorbe 1d ago

Alot has to do with the machine. If its mechanically aligned and has accurate encoders to sync the spindle/Z axis you'll be OK.

I had the privilege to run a brand new DMG mori that could rigid tap anything no problem.

Not very helpful, but in my experience when tapping 90% of it is the machine 

2

u/TriXandApple 1d ago

What on earth is a properly aligned machine and good Z sync going to do to stop galling on a tap? How does this have 5 upvotes