Need Help!- How to cut large diameter thread with milling machine.

[ngwanhoe]

Dear masters..

How can I cut a large diameter thread (female and male) on a mini milling machine?

Tools?
Steps?
Methods?
Pictures?

Thanks a lot

[arizonavideo]

Single point thread milling.

Mach 3 does it and you can make your own cutter or buy a insert and make a holder.

Youtube has a few videos.

[ngwanhoe]

Originally Posted by arizonavideo Single point thread milling. Mach 3 does it and you can make your own cutter or buy a insert and make a holder. Youtube has a few videos.

Thanks.

I am having a manual milling machine similar to harbour frieght. No CNC. Is it possible to do it manually?

[ngwanhoe]

Thank Arizonavideo,

My machine is not CNC. Its a manual machine similar to harbour frieght.

[arizonavideo]

What is larger?

For a mill you can buy a tap or find a lathe if the part can be mounted on a lathe.

Their my be a way to make a jig to allow you cut a known pitch on a round stock but I have not seen one.

[ngwanhoe]

Large like 60mm diameter. Any thread type will do because I will do the same for the male and female side. I dont have a lathe machine and no tap that size.

Form tools or jig? I have not seen one too.

[Andre' B]

Do some research on Joseph Brown of Brown & Sharpe and his universal milling machine.
Area Attractions

VintageMachinery.org - Brown & Sharpe Mfg. Co. - 1919 Image- Brown & Sharpe Heavy Universal Milling Machine

Basically you need some kind of gearing between a rotary table/indexer and one of the slides, probably the Z axis.

In Brown's time that gearing had to be mechanical and in some cases it could get very complicated (variable length drive shafts, universal joints etc.) but today it would be a lot simpler to put a servo/stepper motor on the rotary table and the Z axis and do the gearing in a computer.

[ngwanhoe]

Thanks all,

I guess its either electonic control (CNC) or motorise the z axis and rotary table. Otherwise it is too complicated.