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Thread: Thread dial on Grizzly 4003 Lathe

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    Thread dial on Grizzly 4003 Lathe

    For some reason, my lathe does not have a witness mark on the threading dial housing. Where is the mark usually located on a grizzly? Does it matter? I'm assuming as long as you engage the half nut on the same number at the same spot each time?

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    Re: Thread dial on Grizzly 4003 Lathe

    Quote Originally Posted by ridgeway View Post
    For some reason, my lathe does not have a witness mark on the threading dial housing. Where is the mark usually located on a grizzly? Does it matter? I'm assuming as long as you engage the half nut on the same number at the same spot each time?
    On my G4003G there is no "Mark As per Say" there is the rounded head of a brass nail indicating the number location point! I hope this helps? Pretty bad picture but it looks like it is around the 6:00 position!
    Attached Images Attached Images

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    Tool Steel GK1918's Avatar
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    Re: Thread dial on Grizzly 4003 Lathe

    For what its worth deptartment, sometimes the marks will not line up perfectly. All lathes I have, a witness mark was made on a large common washer.
    That way you cant dial the washer in perfectly when closing the half nut.
    Sam

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    Re: Thread dial on Grizzly 4003 Lathe

    Thanks guys. I'll have give it some thought and come up with a movable washer.

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    Re: Thread dial on Grizzly 4003 Lathe

    Just start the lathe, lock in the halfnuts, and then shut off the motor. The you can scribe a line near any number you want.

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    Re: Thread dial on Grizzly 4003 Lathe

    Quote Originally Posted by epanzella View Post
    Just start the lathe, lock in the halfnuts, and then shut off the motor. The you can scribe a line near any number you want.
    yep that's what I did on mine...

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    Re: Thread dial on Grizzly 4003 Lathe

    Great idea!

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    Re: Thread dial on Grizzly 4003 Lathe

    is the tool set to 29.5
    is the tool ground to 60.
    is it a metric thread dial ?

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