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#37
 
05-28-2009, 03:58 AM
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| Thanks for all the advice on lathe tools - I'm going to have a play with grinding some HSS tools - it'll be a good learning exercise.  BTW - took some measurements and it looks like my cheap cutters use TCMT21.52 inserts.  |
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#38
06-02-2009, 10:29 AM
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| Just thought I'd add this video to the thread since it's related to face milling and seems educational: |
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#39
06-02-2009, 10:40 AM
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| Per the video, unless you have a really stout mill or lathe, always go with positive rake tooling. The lower cutting forces will be easier for your machine to deal with. The only advantage to negative rake is longer insert life. |
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#40
06-02-2009, 11:09 AM
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| Good video, not too complicated but explains things well. Bod is correct about negative rake on smaller machines it may not be suitable. On big machines with plenty of rigidity and power it is fantastic for taking fast heavy cuts on ferrous alloy but not really applicable to aluminum alloys.
__________________ An open mind is a virtue...so long as all the common sense has not leaked out. |
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