Tapping Acme Threads
Tapping Acme Threads
(OP)
Im sorry for the simple question, but I am having a small difficulty with this problem I am having.
Basically, I need to tap a blind 5/8-8 hole into an aluminum piece I have made.
Almost all of the taps I have found are tandem, so I cannot use them. There are also roughing and finishing sets, but they are a little out of my budget.
Are there any companies that sell cheap acme taps for a blind hole or types of machine shops that cut alot of acme threads?
Thanks.
Basically, I need to tap a blind 5/8-8 hole into an aluminum piece I have made.
Almost all of the taps I have found are tandem, so I cannot use them. There are also roughing and finishing sets, but they are a little out of my budget.
Are there any companies that sell cheap acme taps for a blind hole or types of machine shops that cut alot of acme threads?
Thanks.





RE: Tapping Acme Threads
B.E.
RE: Tapping Acme Threads
You'll probably have to buy the thread milling tool they'll need.
For a few pieces, you might get away with a severely modified tap.
Mike Halloran
Pembroke Pines, FL, USA
RE: Tapping Acme Threads
..."Buy two and cut the lower taper off one to make a plug tap."
"Plug tap" ..OR Bottoming tap?
RE: Tapping Acme Threads
what do you mean by this statement,
"Almost all of the taps I have found are tandem, so I cannot use them".
The three styles of Taps are Taper (Starting), Plug & Bottoming.
if one looks at the the three types of taps in the machinist handbook it explains the three style of taps.
acme taps are made in sets starting/roughing, second roughing/sem-finishing & a final finishing.
The Taps are diffrent geomtry for hand Tapping Vs Machine
Tapping.
if the hole is a blind hole the a bottoming taps will be required.
I would recommend having these taps made for your requirement. if it is not off the self Item.
while mill threading the internal acme is possible, In my opinion, it is much easier to tap.
HTH
MfgEngGear
RE: Tapping Acme Threads
RE: Tapping Acme Threads
A.R. "Andy" Nelson
Engineering Consultant
anelson@arnengineering.com
RE: Tapping Acme Threads