toolholders for hardcutting...

May 15, 2010 5 Replies
V

Damn, our hardcutting makino uses three different styles of toolholders, heatshrink, squeeze and insert, and collets.



The collets have rpm limitations. I use em for big endmills, 3/4 etc... sometimes 1/2".



so I'm trying to decide which I like better, heat shrink, or squeeze and fit? The heat shrink has a skinnier shank. The squeeze and fit is super fast to insert. The heat shrink doesn't ever push the cutter back. The squeeze and fit seems a bit more rigid side to side.



They both rock, and they both suck. Both expensive and European. What is the Japanese using?


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R

Never heard of squeeze and fit. I would not mind using heat shrink if the heater/cooler machine was not so expensive, the holders seem to be priced on par with others. Last I looked anyway.

Too rich for my one man shop here.

Thank You, Randy

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V

Ok... Your saying the shrink fit isn't good for aggressive milling? Like possibly a .75-4 flute? And the tribos isn't either.??

I try to use the collets for that anyway, since I have to manage the limited amount of holders I have at the moment.

Sounds like you like collets the best?

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G

Vinny,

A collet for roughing during hardmilling provide damping. HST is great for semi-finishing and finishing. But after extensive experimenting and evaluating, I have found tool life suffers when in HS holders vs collets or other holder types for roughing.

Some pe> A good quality collet tool holder is ideal for hardmilling with limits

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