Threadmill Without Pilot Hole

[McLaren]

 Saw these and we could really use something like this for right angle head work. Does anyone know of something similar that could do a 10-32 STI, purchaseable in the U.S.?

 

 

 

 

 

[Leon82]

I'll bet Harvey tool could grind something if they are not available here yet.

[McLaren]

Found it! Now the question is do you guys think a M5 * 0.8 would create a 10-32 STI? The STI tap is .233" major diameter, and minor is .201". So .016" thread height, and .03125" pitch. The M5 tap would be .198" major, and .165" minor. So .0165" thread height, and .03149" pitch.

http://www.tgs.cz/content/fck/files/katalogy/EDT-eBook.pdf

http://www.westtool.com/default.aspx?page=item detail&itemcode=HIT+897591#tab-1

[Leon82]

I think the numbers are close enough. Its worth a shot if it will save you time

[jlw™]

Mitsubishi makes them too.  Never tried them tho.

[Guest]

Emuge makes them also. Called Thrillers. 

[McLaren]

Got it! Mitsubishi owns the Hitachi product line now. This is an Epoch threadmill designed for M5 * 0.8, but I'm using it for a 10-32 STI, .500" deep in Ti6al4v. Cost was well under $200. I wanted to do some sample holes to see how it holds up before we revamp our process. I got thru 100 holes before the boss said to stop screwing around.

114SFM, .0007"CPT, 2.5 minutes/hole.

[Sticky]

How was the Mitsubishi stock availability? That is pretty impressive life in 6al4v. Were you doing multiple passes?

[McLaren]

One pass, told mastercam it was a single active tooth, .03125" pitch, .233" OD. Lead In/Out was just start at center. 3B thread gage was same on first hole as it was on last hole, no taper.

All sizes should in stock in So.Cal.

[Sticky]

Sounds too good to be true, I'll have to buy some.

[Tim Johnson]

I get a lot of Mitsubishi that "stocks" in CA or Toronto, until I buy them. I was told it will be a while before there is a good variety of Hitachi tooling in CA a few months ago. I do like their variety though.

[jeff]

2-1/2 minutes per hole for a #10-32?

I almost never work with titanium, but that can't be faster than drilling and tapping/threadmilling. Can it?

[McLaren]

 I mentioned in the first post that it's going to be for right-angle head work. Don't want to have to purchase another right angle head.

[Sticky]

5 hours ago, jeff said:

2-1/2 minutes per hole for a #10-32?

I almost never work with titanium, but that can't be faster than drilling and tapping/threadmilling. Can it?

 

These aren't really high volume type tools. Drilling and tapping, or even drilling and threadmilling with a multiform threadmill would be much faster. But these tools have two huge benefits for certain applications:

1. It's one tool that can do the job of 3 (drill, tap, chamfer tool), there by saving programming time, and spots in the tool changer.

2. Ability to easily make threads in hard materials, angled surfaces etc.

 

In one video they are making threads in 65rc material. I usually have to edm that, sometimes I threadmill it.

 

If you are doing high value work, it might also make sense because less tools = less chance for things to go sideways. That is the reason I only threadmill on high value parts, the time it takes to remove a tap or re work parts ranging from $500-50,000 is never worth saving the couple minutes of time between taping and threadmilling.

 

[mkd]

Amazing!

 -assuming they have a different part number for J threads?

[Leon82]

3 hours ago, mkd said:

Amazing!

 -assuming they have a different part number for J threads?

Internal threads only the minor is a little bigger. The tap is the same