1/2-5 acme thread

[amechaman]

I am having trouble finding taps or thread mills to cut a 1/2-5 acme 2G thread. This thread is awful coarse for this size hole. Can you cut a 1/2-5 internal thread or is this impossible. Thanks for any help in advance.

 

[mfgenggear]

What area of the country are you?

Because according to ANSI B1.5 that is not a standard size.
so you will have to special order them, if it can be made.
not sure with out drilling down deeper into the calc's.

contact a company who specializes in fabricating Taps.
They can tell ya if it can bedone.

 

[hydtools]

Maybe Vardex can help

http://vardexusa.com/vardex-pdf/VARGUS-MiniPro-Catalog-inch.pdf

Ted

 

[amechaman]

US

mfgenggear you are right this is not a standard thread and everyone has no quoted building the special tooling because it is so course for the dia.

 

[mrainey]

The minor diameter is .300 and the thread height is .100 - snap, crackle, and pop.


Software For Metalworking

http://closetolerancesoftware.com

 

[mfgenggear]

If thats the situation, if this is a new design you need to corespond with the cutomer/design engineers, and see if they work work out a standard acme.

if the vendors (Tap & die mfgs ) are no quoting then there's a problem. The design is FUBAR.

 

[eromlignod]

Are you also making the mating screw?

Perhaps you could talk them into a double-start screw. This would give you the required lead (.200 per rev.) yet would yield normal-depth threads. It would look like a standard 1/2-10 Acme thread, but with a steeper helix.

Don
Kansas City

 

[eromlignod]

Incidentally, you can buy a 2-start, 1/2-10 nut right off the shelf (McMonkey-Carr has several versions) and weld/press/fasten one into your design. Again, it depends on whether you also have control over the screw selection.

Don
Kansas City

 

[amechaman]

we are making the mating screw. the customer wants the threads
as they have them drawn so i am going to try and single point thread mill them. thanks for everyones help

 

[Albigger]

I would go with eromlignod's suggestion.

This place has 1/2-5 ACME 2G cylinder nut, you could buy and cross-pin/weld/etc... into your part if possible.

http://www.greenbaymfgco.com/catalog.php?cat=1

Scroll almost to the bottom, P/N 2040-16

(FYI I have no affiliation with Green Bay MFG, but I have bought from them before).

--Jay

 

[mfgenggear]

OK my specialist says it can be done but not practical

Western Tap in California

1-eight hundred -253-eight 2 77