threadmilling

[Joels]

I am looking for a threadmill tool that will for example thread a 1/4-20 hole to 1 inch deep. Does anybody know where i can get this tool?

 

[richardtraver]

you can't tap it? that's a pretty small hole.

[Joels]

I am happy with the tap but the boss wants to make improvements. I told him that i havent seen a thread mill that will go that deep but i thought if one did someone here would know about it.

[M. Anderson]

Contact Paul - "Toolfab", here on the board

 

"Toolfab"

 

or check their web site -

 

"Schmarje"

 

May make you a special?? But that is DEEP for that small a hole.

 

HTH

 

Later,

 

Mark

[Joels]

Thank you Mark. looks like a good place to start.

[robk]

Joel,

Here is a link for some single profile solid carbide thread mills SCT . The LOC is only .650, but overall length is 2 1/2". If you have the capability to work with carbide you could just grind down the shank dia. some more or just have them do it for you. Single profile is pretty cheap too. This one should be under $50.00.

[Harryman]

quote:

---

the boss wants to make improvements

---

Unless you are making a long barrel nut, one improvement might be to reduce the length of that thread. If that much length is needed tapping is probably better than milling.

 

Much of the reason for milling is to precisely control thread depth. For example, to get exactly 4 1/2 turns of perfect thread so the 4 turn screw will never bottom out and then not waste time drilling a hole deep enough to provide chip clearance plus lead clearance plus tap tip clearance plus an extra turn or two.

[Sparky112]

Im with rob on this. We use SCT thread hobs and weve cut the stem back to get more DOC. works pretty good, but we only use it infreqently.

[PE @ IHS]

Thread milling a hole that size is a waste of time. Depending on thread tolerance required, try going to roll forming taps for far longer tool life. If your machine supports peck tapping, that might be another avenue to explore.

[Joels]

Thank you all for the information. I am passing it onto the boss. I did order a catalog from Toolfab in case he wants to purchase some threadmills.

[Toolfab]

Mark, thanks for the props!!!

 

 

Joel, I have to agree, thread milling a 1/4-20 1" deep is a stretch. To threadmill a 1/4-20 the "off the shelf" tool would have a dia. of .187 with a standard LOC of .500

 

Thanks for the catalog request, I will get that in the mail right way.

[Doug Gabbey]

Watermaker,

A.B. Tools in SAn Jose make threadmills and can modify to suit.

Tel 1-408-435-8911

Fax 1-408-435-5013

 

Doug

[GVM]

A.B. Tools moved quite a while ago. Here is there info;

 

A.B Tools

1051 Aviation Blvd.

Lincoln, CA 95648

ph 916-408-2442

fax 916-408-0740

www.abtoolsinc.com

[jctjct]

We had AB Tools make us some custom t-slots and they did a really nice job. Takes some lead time for specials though.

[Tim Aydt Prototek Engineering]

I gotta agree with Peter E on this one (oops! read in another post not ever ever do that)

 

Oh Well! I will take my chances.

 

Rollforming is definitely the way to go for that particular application. I like thread milling alot. But that little guy (1/4-20) would take alot of cycle time to complete properly. You would probably have to go in and do spring passes to get a nice sized thread. Plus! The cost to time ratio..... It would be HUGE!

 

Keep on Rollin!

[PE @ IHS]

Now you're in trouble Tim. Agreeing with a sales monkey creates the impression that some sales monkeys/donkeys actually know something!!

[crazy^millman]

Hey Peter people buy software from you don't they?

 

Where is the Donkey when you need him.

[Joels]

i agree it is a waste of time to threadmill certain times but this is what the boss wants and he pays the bills. I would not be surprised if we order specials from tool fab

[Tim Aydt Prototek Engineering]

Well.....In that case. I would do a side by side time study, cost analysis, maybe even a quality comparison between the two types.

 

 

Peter

I know I know... I took my chances and now I have to live with it. All I can do is move forward and learn from my mistakes.

I promise I will TRY to never do it again.

[Toolfab]

Joel, if you want to give me a call so we can talk about please do, otherwise, drop me an email. I can then go over the specifics with you!

 

to "he pays the bills" you have to PROVE him wrong before he begins to think that you are right...lmao