Large threadmill

[bogusmill]

I have to thread several 4"-12 X 4.5" deep holes. I plan on using the thread mill operation but haven't had any luck finding a single point thread mill cutter. Does anyone know where I can find one?

[specv]

any particular reason you need to single point it? we thread mill holes this big all the time but use insert threadmills. like these .pdf"]http://www.vardexusa.com/files/MiTM%20Catalog%202009_Inch[111109].pdf

but they have these which are single point inch.pdf"]http://www.vardexusa.com/files/TMSD%20Catalog%202009%20[151109]inch.pdf

[within a thou]

Is there a reason for using a single point? It would be a lot faster with a multi point. Personally I like Iscar and Vardex for my inserted threading tools. If you go to there website they have a interactive page you tell them the specs and they suggest the best cutter. When you select the cutter tell it the control you are using and it will generate a program for you that you can cut and paste into your nc editor software.

[bogusmill]

If we have a single point it can make many different threads per inch. A multi thread tool for this leaves us only making 12 TPI holes.

[bogusmill]

Thanks specv, that is what I was looking for.

[within a thou]

If we have a single point it can make many different threads per inch. A multi thread tool for this leaves us only making 12 TPI holes.

 

But the inserts are interchangable within the cutter body. Just swap the insert and go to the next size. Another benefit is the multi point is they are full form no need to bore the minor to size the threadmill will do both the minor and major for you which saves a lot of time when the guage doesn't fit in figuring out whether it is the tool that did the minor the one that did the thread.

[djstedman]

If you bought an insertable one .. although that insert would only make 12TPI holes.. for any other TPI you just buy different inserts and re-use the body.

 

A single point tool is more likely to wear that one point much faster than a multi flute insertable threadmill and for holes of this size its really not going to take too many holes single pointing to waste so much time you could have bought the insertable threadmill and the proper inserts and knocked them out faster freeing the machine up for other work.

 

Those are probably the reasons that its hard to find a tool for what you are looking for, that said.. if your dead set on making it single point.. you could always look for a insertable body and then alter the inserts and remove all but the bottom tooth.

[crazy^millman]

Take a boring bar 2" that holds threading insert and throw it in a milling holder and you got a single point tool all day long.

 

HTH

[gcode]

Emuge has a full line of tools for work like this

 

http://emuge.com/thread-mills

http://emuge.com/brochure-downloads/thread-milling-bodies-multi-tooth-indexable-inserts

[bogusmill]

We are a research shop so we seldom see more than 5 of the same part. The versitility of a single point tool is more valuable to us than a tool that will only cut a 12 TPI thread. Gcode your link looks like womething we can use too. Thanks guys.

[IanW @ QTE MFG. Solutions]

+1 for Crazy^Mill/turn's suggestion.