I need to tap completely through a 1" piece of 6061 alum. about 200 holes. 10-32NF. Cut or form, either one ,however I would like to use the flood coolant in the machine not have to stop and apply some other type of coolant. Val-cool vnt-700. Rigid tapping.
Toolpost grinder and relieve the neck on some standard spiral point taps?
Thank You, Randy
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Randy, I like the OSG line. Some of their taps are already relieved and would almost make you 1" requirement:
Best, Steve
Randy,
Relieving the neck on a tap should work just find.=20 Like Steve, I prefer the OSG roll taps (their cut taps also work quite well). About a year ago I made some mold inserts with a 6-32 x .75 min. good thread, blind hole in 303SS. Had to grind the neck back a little over 1/4" to get it. Made 1000 pieces, and still have the tap for the next time:-)
Matt
Sounds me like a job for a pulley tap. Like this one:
KG
Or, if you need even more length with a reduced shank diameter, this might work even better:
That does it. BTDT.
Sidenote: If a normal tap's thread is too short, it is worth rethinking the construction. YMMV.
Nick
BTDT = ? It's Monday and it's early.
Not my design.
Thank You, Randy
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Randy:
I like using a 5c spin jig on the surface grinder for relieving the necks although the toolpost grinder sounds good to if I had one. Spin jig's a quick setup though. Duffy
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