What is it/what is it used for? 5c Relief Grinder
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    Default What is it/what is it used for? 5c Relief Grinder

    Going through my drawers and thinning out what I do not need.

    Can anyone tell me what this is used for? It takes a 5c collet, the top pin is an index, only one hole. The front has what looks like a spring washer, so if you drive the screw in it cams up and drops.

    Just trying to determine if I have a use for it.

    Thanks,

    Marco

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    Single flute countersinks?

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    i you put a fair price on it i my be interested

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    Quote Originally Posted by Mud View Post
    Single flute countersinks?
    As in sharpening?

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    May for sharpening taps or csinks

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    It says right on the label what it's for. It's for grinding relief on cutters. The cam is what produces the relief. This particular device is going to give you axial relief on an end-cutting tool. It won't do anything about radial relief on side-cutting tools.

    If you put multiple screws in the front index, you should be able to put relief on multiple flutes.

    Oh, and if you're not interested in it, I would be.

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    Prototype flesh light

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    One can circle grind as in just spin a cutting tool end round at the desired angle, then bring each flute end to a mark, to a finger or just eyeball to the center line and then radial relief (roll) each flute end to bring the radial relief grind action to just take away the circle grind to very small land and then wipe it out....often the angle will not match exactly straight so you bump a little more angle ( a half-degree or so) and to matches perfectly.
    This sounds troublesome but is no trouble at all and goes very quickly.

    Often one would go (grind) to just wipe out the circle land (to sharp) and then dial another .001 just to be sure old eyes were not leaving any circle land.

    Some such devices have a cam to ride on that increases as you go down the cam so one might go from 10* to 15* or so..

    As you go closer to the OD the axial clearance may not put on enough clearance. Say it would be good for 90* to 45* but getting to 70* it may not have enough clearance, so might heal drag..
    We used to call that tilt and roll, think that is at about page 64 or so in the Cincinnati Tc grinder handbook.

    XX nope it (tilt and Roll)is not in the handbook...darn

    So consider if you put 10* on the end of a cutter by tilting a work head, then turn the cutter to be near adjacent to the OD you would have zero clearance there. diminishing clearance.. The same would apply to a cam action to the end.

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    Thank you for the replies. So would it be used on a tool and cutter grinder?

    I studied some cutter diagrams and now have a better understanding. Not really sure I need this fixture, I would be open to selling it.

    Thanks,

    Marco

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    tool and cutter grinder best but any grinder with an infeed would do.


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