Thread mill question

[JC]

I have finally perfected the live threading jig that I designed and built for use with my Hightower deluxe lathe but I need a new thread mill. The jig works perfectly but the thread mill I have is a bit dull.

I see the micro100 tm-250-16 but it's thread pitch range is listed as 14-48 threads per inch. But I also want to live thread my shafts @ 10 threads per inch. Will this work for that thread pitch in wood? Or will it not cut deep enough? Is that just listed for metal? With a .308 minor modified pin it seems like it should cut the threads just fine unless I'm missing something.

Thanks,

JC

 

[SpiderWeb]

You can have the one you have sharpened.

 

[JoeyInCali]

For joint screw installation, it won't reach the bottom threads as the neck length is only 1".
I get mine re-ground so I can go 1.875" deep.

For shafts, you can use it some .0303 deep then follow with a tap to clean the bottom of the threads.

You might as well get a 5/16 reamer ground to .308.

Your tap probably has a .295" pilot. Keep the hole at the size when you live thread, follow with a tap then ream it to .308".

Btw, scrap wood is free. Do some mock-up.


Here's one to get and save some $.
http://www.ebay.com/itm/310946541855?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT

 

[JC]

You can have the one you have sharpened.

Good point but the one I have has more trouble than that. It's too fat at the neck and too short so I figured I'd just start over. It came with a router I bought from Forney.

For joint screw installation, it won't reach the bottom threads as the neck length is only 1".
I get mine re-ground so I can go 1.875" deep.

For shafts, you can use it some .0303 deep then follow with a tap to clean the bottom of the threads.

You might as well get a 5/16 reamer ground to .308.

Your tap probably has a .295" pilot. Keep the hole at the size when you live thread, follow with a tap then ream it to .308".

Btw, scrap wood is free. Do some mock-up.

Thanks for all the pointers Joey.

Harvey tools has one with a 1.75 inch 1/8" neck and 3 inches overall for 65 bucks. That's deep enough for what I'm doing without mods. It's not like we have anyone here that can do that locally.

# 981003

http://www.harveytool.com/prod/Doub...ducts_196/Double-Angle-Shank-Cutters_210.aspx

Right you are. Scrap wood makes the best sawdust

JC

 

[Kim Bye]

I have contacted Harvey tools, they could do a custom order for a long neck 10TPI thread mill.
I have to order atleast 3, the price is $197/each.
I have the specs if any one is interested.

 

[GBCues]

Chris has them on his site as well - a different style, but longer.
https://www.cuesmith.com/carbide-thread-milling-internal-bit-1-8-shank.html
Unfortunately both the internal and external are out of stock, but that might be short lived.
My 2 cents,
Gary

 

[Kim Bye]

Chris has them on his site as well - a different style, but longer.
https://www.cuesmith.com/carbide-thread-milling-internal-bit-1-8-shank.html
Unfortunately both the internal and external are out of stock, but that might be short lived.
My 2 cents,
Gary

The shank is 1/8" I have both, they flex a bit. They are meant for the Dremel Chris sells.
I recomend a larger diameter shank and more than 1 cutting head.

 

[twowayshot]

Thread mill

I recently had three Carbide Thread Mills made using the dimensions of the thread Mill drawing Bob provides on his website. I'm not in the business to sell tools but I had to buy three to have online carbide make them. I had them ZrN coated. I will take $130 shipped and I will sell two.



Jon Horton
704-726-1612