Biggest tap you have done on your machine

Mill
1

I asked Tech on this, but did not get them to bite, so I’ll ask here.

This is a TAPS ONLY quesion, NO thread mills.

Im redoing my tool library and reserving tool numbers for common and standard tooling, including taps. What’s the biggest tap you’ve done on your machine? Im on a 1100M. Will it do 1/2-13 or 12-14mm?

2

3/8-16 in 4140 low gear

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What machine are you on? and do you think it would do a 1/2-13? in Alum? and steel?

4

1100mx
I use the peck taping function

Yes I think you can make it work
Use Low speed pulley
In steel do not use the standard 75% engagement increase your tap drill size ti the 60% number

Standard tap drill size for 1/2-13 (75%) is 27/64
60% is 7/16

You should be able to do 75% in Aluminum with lots of lubricant

If things start going wrong, have your finger on the stop button(not e-stop)

Hit stop, with one hand release the tool-with the other hand hit G30, then you can un-screw the tap and try again

If it’s struggling try increasing the rpm some

Good luck
Ed

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Thanks for the input Ed!