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To heat treat ......or........not ???

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  • To heat treat ......or........not ???

    A question on regrinding end mill cutters......

    When regrinding old milling cutters(especially on radical regrinding.....like creating new, special profiles), is it necessary to "re-heattreat" them to maintain their hardness or are they sufficiently hard (throughout the tool) to eliminate this requirement.

    I'm presuming "good quality" cutters to begin with. Not sure what one might expect with "low cost, foreign" cutters.

    Thanks in advance......

    Regards,
    Rodger

    RPease

  • #2
    Roger,
    No re-heat treat isn't nessesary.
    End mills are made from HSS and will keep their edge even when hot.
    It pays not to get them too warn when grinding but the size of these cutters makes it uncomfortable to hold if too hot.
    It pays to quench regular.

    John S.
    .

    Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.



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    • #3
      Thanks John,

      I thought so, but wasn't certain as I had never reground as severely as some of the ones that you showed pics of.

      Best regards..........
      RPease

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