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Rocking motion of T&C Grinder

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  • Rocking motion of T&C Grinder

    The tool holder on my T&C grinder moves forward and back several inches, it moves in rotary fashion unrestricted, it has a degree setting for moving the tooth blade holder radially and it has a side to side rocking motion that is controlled by screws and lock nuts.
    What is the purpose of the rocking motion?
    I bought a CD "Tool and Cutter grinder Mk4" but I can't find the answer in the section on general tool grinding.Can anyone supply me with an answer?
    Today we carve our own omens Leonidas at Thermopylae

  • #2
    can you take couple of photo's? - I'm sure back and forth and side to side make perfect sense when you're looking it at

    is the rocking spring loaded? on mine its just a way of engaging/disengaging the cutter into the wheel. with the cutter disengaged, you position the cutter relative to tooth rest and wheel and then slowly to start cutting


    • #3
      Not sure if this is what you are describing but: I have seen grinders that do this when you are grinding the OD of the end mill. You grind the OD from the cutting end to the shank end. Then “rockâ€‌ the holder away from the wheel for the return stroke. That lets you go faster since the end mill is not in contact with the wheel.


      • #4
        I get the idea. Thank you, gentlemen.
        This is the grinder mentioned in this forum, listed on Ebay a month or two ago. Turns out it is the tool holder described mated to a toolpost grinder for a Logan 10" lathe. Even has the mounting piece for the compound.
        As a toolpost grinder, it is worth more than I paid. The base is a milling vise for the Logan which, again, is worth more than the price I ended with.
        The tool holder is obviously from a large t&c grinder of ancient vintage.
        No complaints, even if I don't get it to sharpen my end mills.
        Today we carve our own omens Leonidas at Thermopylae