What type og tool Steel?
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    Default What type og tool Steel?

    Hi,

    Not sure if this is the right place to post this, but here goes:

    I need to make a custom cutting tool, in the style of an indexable helical endmill. What type of tool steel should I use, and what sort of heat treatment should I go for?

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    Quote Originally Posted by VikingD View Post
    Hi,

    Not sure if this is the right place to post this, but here goes:

    I need to make a custom cutting tool, in the style of an indexable helical endmill. What type of tool steel should I use, and what sort of heat treatment should I go for?
    Silver steel [USA drill rod], O1 tool steel or HSS. Heat treat 64 Rockwell scale C, you could heat treat the silver steel yourself if you have the facilities.

    Tony

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    Thanks Tony!
    I'll go with O1 then, since that's easier for me to source.

    -Tom

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    What material will you be cutting with this? How long does it have to last? T-15 or M-2 if it sees severe/long duty. If it's Al. or brass then O-1 can work for a once/twice use. You may even want to consider making a cutter for roughing and one for finishing if it's warranted. Better descriptions get better answers.

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    I second the M2 comment. It is
    Recommended by Bohler to be used for milling bodies, and all sorts of cold work tools too.

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    Quote Originally Posted by modelmakerblue View Post
    Silver steel [USA drill rod], O1 tool steel or HSS. Heat treat 64 Rockwell scale C, you could heat treat the silver steel yourself if you have the facilities.

    Tony
    Is this a body holding inserts or will it be cutting? If the tool will be cutting, than M-2 (63-65RC)is a good choice. (Limited use with low cutting speed you could use O-1).
    If it serves as a body holding inserts than O-1 is ok.
    O-1 tool steel at 64RC will most likely shatter on first try. You need to draw it down to 59-61RC.
    Light cherry red, quench in oil, clean and draw to light brown-brown.

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