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Thread: Gage Blocks

  1. #1
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    Gage Blocks

    I picked up some gage blocks at a flea market. They don't seem to match up to either inches or metric measurements. Does anyone know what unit of measurement these are?
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  2. #2
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    They are not gage blocks in the normal sense. They could have been custom made for any number of machine shop jigs. I suspect that they are custom made blocks for setting a particular angle on a sine plate. It's hard to say for sure what the intended use was.
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  3. #3
    Yup, the dimensions of the blocks in inches is written on them. Things like that are often used in conjunction with a specific vise, like in a CNC machining center to set a part off a vise jaw a very specific amount so they don't have to guess where the zero point is. The one with the circles is interesting. Might those happen to be magnets?
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  4. #4
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    The circles are not magnetic and someone went to a lot of trouble to make these. I also bought a set of small blocks similar to what would find in a normal boxed set of gate blocks. They are steped down in irregular increments. They also do not match up with obvious inches or metric increments. Thanks for your comments.

  5. #5
    I once bought a folding 3 inch ivory rule that was longer than 3 inches. Sold it ,but I'm convinced it was Danish ,their inch
    is a tad longer. I don't know why. No, it was not a pattern shrink rule. Just making the point that something of that sort,
    That is slightly off from standard might be Danish.

  6. #6
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    These are the smaller sizes. I also wrote the inch equivalent on them.
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  7. #7
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    The one with the circles might be a magnetic parallel. It is not magnetic until placed on an electromagnet. Then it transfers the magnetism and is magnetic while the electromagnet ie turned on.

    Not sure if I explained that very well
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