Shrink fit broken tool removal? - Page 2
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  1. #21
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    Quote Originally Posted by litlerob1 View Post

    OR an adapter for the end of a .45 into the back of the Holder. Literally just use the bullet, and shoot it out. Quit messing around with black powder. Easy fix.

    R
    That only works for holders half inch and above...

  2. #22
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    I think it will be tough to remove because the holder need be made hot very quickly so thwe tool does not also expand.

  3. #23
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    Quote Originally Posted by michiganbuck View Post
    I think it will be tough to remove because the holder need be made hot very quickly so thwe tool does not also expand.
    Shouldn't be that hard, the steel used has about twice the CTE as carbide. As others have mentioned, there's a chance that burring of the holder caused by tool breakage is complicating matters.

  4. #24
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    Quote Originally Posted by Milland View Post
    That only works for holders half inch and above...
    Because half inch and above would be safe!!! Hahaha splitting hairs, if the net result is the same.....

    R

  5. #25
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    Quote Originally Posted by litlerob1 View Post
    Because half inch and above would be safe!!! Hahaha splitting hairs, if the net result is the same.....

    R
    I guess I should have smilied my other reply...

  6. #26
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    Quote Originally Posted by mmurray70 View Post
    Pull the stud out, push a rod through the backside, keep light pressure on rod and heat the holder with propane torch until it pops out.
    I wouldn't recommend this, you will ruin the holder. I destroyed one of mine just by cycling it twice in the induction heater to get a broken endmill out.

  7. #27
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    Alright ill share my solution, I've been out of machining for a while but started helping a guy a few weeks ago. We ran into this issue so while the vf3 was doing its thing I hopped on the manual lathe and whipped this up from scrap. It is spring loaded and screws into the PS hole. Worked well except the braze rod I used bends when hot(got the two broke endmills pushed out though.) I’m thinking about making a small run and using hardened h13 for the push rod and hot bluing them; any interest?


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  9. #28
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    Quote Originally Posted by TheBigLebowski View Post
    I wouldn't recommend this, you will ruin the holder. I destroyed one of mine just by cycling it twice in the induction heater to get a broken endmill out.
    Not much to loose, the holder isnt any good with a broken tool in it.

    Lots of cheap ass people using propane torches with heat shrink tools everyday. It should be fine, probably wont even need to get all the way to normal expanded temperature as this includes some clearance for tolerances. In this case as soon as theres any clearance at all tool pops out. Keep the heat even and it will be fine.

  10. #29
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    Quote Originally Posted by mmurray70 View Post
    Not much to loose, the holder isnt any good with a broken tool in it.

    Lots of cheap ass people using propane torches with heat shrink tools everyday. It should be fine, probably wont even need to get all the way to normal expanded temperature as this includes some clearance for tolerances. In this case as soon as theres any clearance at all tool pops out. Keep the heat even and it will be fine.
    I think i seen Peter Stanton heat one up with a torch once not sure, but if thats the case he must be a cheap a** like me ive never had a problem doing it but then i don’t concentrate the heat in one place


    Sent from my iPhone using Tapatalk

  11. #30
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    I have also been a cheap A** for the last 5 years ,,, I think I have used two $6 bottles of map gas and have changed out a couple hundred tools ,,, one of my 3/8" holders Techniks holders has been changed out well over a 100 times and it still has a runout of like .0002 on the tool shank ,,,

    I don`t see a point in spending 10K when a $30 torch from home bump gets the job done ...

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  13. #31
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    Quote Originally Posted by Milland View Post
    I guess I should have smilied my other reply...
    I see smiley faces in every post, whether they are there or not. I assume everyone is as sarcastic and hilarious as I am.

    R

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