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    Default fine feed box?

    I saw a 9A listed on FB and someone mentioned it had the desirable fine feed QCGB. I had never heard of that variation. How do you identify one?

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    There are several variations of the ranges of longitudinal feeds and TPI that you may see a QCGB with. I was only aware of the two options of 2-128 and 4-224 (TPI) but a quick google shows there’s a 4-480 gearbox as well. If I had to assume I’d say it’s likely that they have a machine with a 4-480 gearbox. Why you would want a machine that is capable of doing that, I’m not really sure? That’s one hell of a slow cut at .0007”/rev.

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    I would assume people doing optics would want the fine threads.
    Thanks for the info. I'll run down and see what I have.

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    4-224, Thanks again

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    That is standard box for workshop series 9/10k -AFAIK the only one ever offered.

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    I'm no expert, but the only fine feed one I have seen is on the heavy 10.

    You can identify it by the left tumbler going from A to G instead of A to E.

    They didn't come on the 9" models.

    I think some people confuse the single tumbler with the double tumbler and think it has more feeds, but I think it's the same. Besides the tumbler, there's a 3-position lever on the top and the sliding gear on the side.

    Where that ultra fine feed comes in handy is for better finishing cuts.

    Steve


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