tap or thread mill

[Mike@Dive Lab Inc.]

Hey everyone, I have a some parts im going to be doing that require a 3/4-16 thread in 316 s.s. the main issue is my machine torque (mini mill) Ive tried to tap that particular thread one other time only on 2 parts. I went approx .010 over on the tap drill and used a OSG tap for S.S. The mill really struggled. It is a blind hole 1.2 deep. I need a min of .437 depth of threads. I'm considering thread milling or using a starter tap and hand tap to finish. I only have 20 parts so hand tapping is not a big deal. Just curious as to what you guys with thread mill experience would suggest.

 

Thanks,

 

Mike

[Guest]

Threadmill it and be done with it.

[john316]

.

 

As long as your mini mill is strong enough to hold the thread tolerance you need, thread milling is the way to go. Spend the money for a good carbide thread mill and it will be well worth it.

 

.

[Quickmike]

Buy a sinle point threadmill and you will be able to do any thread that comes in as long as the tool will fit into the hole. I'd try to get something with an insert if possible.

[Storkman]

Thread mill. The guys here prefer Emuge.

[Mike@Dive Lab Inc.]

Thanks, I'll give it a try

 

Mike

[Kelly Burns]

We just used our MiniMill to do 1"-14 with a threadmill, You can use a tap, just go fast with it or it will stall out.

[Guest CNC Apps Guy 1]

Minimills are gutless. Threadmill that sucker.

[Guest]

quote:

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Minimills are gutless.

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ROTFLMAO

[Guest CNC Apps Guy 1]

Well.......... it's the truth!!! One place I worked at had one. I tried using a 2" face mill, I could only take .03" on the depth at 60% engagement. a 3/8 E/M could stall the sucker!!!! In it's defence though, once we figured out what we could do with it and how it liked to cut, it was a very good machine for the price. We used "Autofeed" to help with the stalling issues and that seemed to work along wioth babying the cuts and stuff.

 

I'd actually consider putting one in my garage if I could afford it.

[Kelly Burns]

Agreed. I have a VF10 for the rough stuff.

[iowajim62]

Mike76,

 

Check these out,with price too.

 

3/4-16 Carbide Thread Mill

 

Nice thread mill geometry with legend and sample code.

Iscar Thread Mill PDF

[Randy Morton @ Clem Industrial]

Alternatively if you don't want to spend the coin, you can use your existing tap and peck tap it like .05" deep at a time to reduce the torque needs....

[Jeff the haas_guy]

quote:

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Minimills are gutless.

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I'd like to add worthless to that statement.

[Greg Williams]

Threadmill is the only way to go

[Charlie Pierson]

Thread Milling gets my vote !!

 

cp