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  1. BilletGuy

    thread depth measurment

    True, if it specified +/- .005, but we're talking about the application of the general tolerance on the print are we not? In that case, at least for this customer and several others, a three place decimal means a minimum depth.
  2. BilletGuy

    thread depth measurment

    Here, open up good 'ole Handbook H28, the Federal Spec for screw threads. There's a standard gaging practice section that in my 1969 version starts on page 6.0. Section 5.6 GAGING FUNCTIONAL DEPTH LIMITS OF PRODUCT INTERNAL THREADS. It starts out talking about depth limit steps on gages...
  3. BilletGuy

    thread depth measurment

    Well, no, its not the inspector's job to "guess", it's the inspector's job to "know". The point I was trying to make before is that according to The Book, the standard 3 place decimal tolerance on the drawing does not apply to the maximum depth of the thread in the same way the major diameter...
  4. BilletGuy

    thread depth measurment

    After thinking this one over for a little bit, I think you need a new inspector. Stick to your guns on the turn counting method and let the rejected good parts pile up to the ceiling if you have too. This is called "Industry Accepted Practice"...at least in this country. I've been in the...
  5. BilletGuy

    thread depth measurment

    Good Gawd I hate standard tolerances...that and Mech Guys who never browsed a Machinery Handbook or a supply catalog. DO NOT BUY THAT GAGE!!!!! They work too good and they don't apply to a standard callout. You'll be beating your head against a brick wall for the rest of your life trying to...
  6. BilletGuy

    "oil treatment" of metals

    I don't know about the baking on of WD-40, but there are readily available Dry Film Lubricants such as Dicronite that are used in many aerospace applications. A couple of calls to some of your local plating houses might get some explainations you need.

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