end mills for shrink fit holders?

[veritasproject]

do i have to use special tools for my shrink fit tool holders or are any end mills and drills ok?

[[email protected]]

I have some CTS drills in shrink holders and they are just normal size metric shanks.

 

HTH

[RobertELee]

OSG warns to only use tools with shanks having an H6 tolerance for tools between 3 and 5mm and an H7 tolerance for tools between 6mm and 25mm in there shrink fit holders.

[Mark H]

The tool shank must be H6 tolerance for Haimer shrink fit.

[cqualls]

Osg does warn about that but the reps from OSG that I use to deal with said they had several clients using regular endmills in there tooling with no problems.

I used the regular cheap osg endmills in the osg shrink fit tooling all the time with no problems.

[MotorCityMinion]

Make sure to sink the tooling as deep as possible into the holder, otherwise you will create a "shelf" that you won't be able to get past with the good tooling.

[mcpgmr]

We use Robb Jakk and Kennametal Solid carbide e.m.'s in our shrink fit holders. They work just fine. I cut alot of titanium and the tool life is unbelievable. Just don't try and use HSS e.m.'s in your shrink fits. They are a bitch to get out if you are lucky enough to get one out! I found a few holders laying around here that are basically useless now until someone decides to get out the torch and some dry ice. The HSS and the holders have basically the same expansion and contraction rate.

[[email protected]]

quote:

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HSS e.m.'s

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What's that?? I thought they only made taps out of that stuff

[mcpgmr]

quote:

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I thought they only made taps out of that stuff

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What's a Tap?

[Columbo™]

I've had tools pull out from both hydraulic holders and shrink fit holders......YES watch for tolerances.......Cut a part in Korea on a 7 axis spar mill that was 40 feet long......after the cut I had four parts instead of two.....Both spindles had .750 solid carbide end mills and the tools pulled out about .300. Not fun trying to explain that to HYSA. (Hyundai Space and Aircraft) A year and a half after I left and Boeing had problems with HYSA

 

I wonder if it was the holders.....Prolly NOT!!!!

[Josh T™]

What's shrink fit???

Isn't that what happens after the wife washes and dries your underwear?

 

[mcpgmr]

I thought I had one pull out once but it was my lack of patience to wait for the holder to cool down all the way before I re mounted it to the cat 40 part of the holder. Put them together hot and they cool down in the spindle and come loose. Now I dip them in the warm waterjet tank and cool them slow then blow air on them to cool to room temp. The fan on the shrink fit unit just takes too long to cool them down. I did notice that they do start to lose their integrity after being heated up so many times. I have a few that I just cant get e.m's into anymore. Thinking about honing them open maybe a few tenths to see if I can use them again.

[Cad-Camr]

We got a couple shrink fit holders to use on close tolerance parts. We didnt use good enough tools and the result was tool run out.

[mcpgmr]

When you say not good enough what brand are you talking about? Carbide e.m.'s run .002" under on average. The shrink fits we use have no problems with run out or holding on to them. By the way we use Iscar RTM Shrink fit holders.