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Tru-Pos Locators UNJF thread

Need to measure some threaded holes 1/4-28 UNJF.
Anyone know where I can find plugs for this thread to check location?
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  • just search cylinder or shank probes there are tons of threads on here explaining why. I think I even have a couple of threads myself on this subject. I use to check dovetail o ring grooves with a shank probe untill I realized the uncertainty of using them.


    I'll look into that. Thanks.

    EDIT: Ok, so I read through a couple "heated" threads about cylinder probes. I understand reason WHY they are inaccurate, but I think in my situation that doesn't apply. I only use the cylinder probe for checking threads that have a true position that needs an accurate diameter for MMC purposes. Typically at A0B0. I've also used the cylinder probe to check a sheetmetal part off the waterjet with some serious draft angles and large-ish tolerances. It was run on the CMM because the sheer amount of dimensions that needed to be checked.

    In my case, the cylinder probe works just fine.
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  • just search cylinder or shank probes there are tons of threads on here explaining why. I think I even have a couple of threads myself on this subject. I use to check dovetail o ring grooves with a shank probe untill I realized the uncertainty of using them.


    I'll look into that. Thanks.

    EDIT: Ok, so I read through a couple "heated" threads about cylinder probes. I understand reason WHY they are inaccurate, but I think in my situation that doesn't apply. I only use the cylinder probe for checking threads that have a true position that needs an accurate diameter for MMC purposes. Typically at A0B0. I've also used the cylinder probe to check a sheetmetal part off the waterjet with some serious draft angles and large-ish tolerances. It was run on the CMM because the sheer amount of dimensions that needed to be checked.

    In my case, the cylinder probe works just fine.
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