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3DDave, in Automotive the legal department doesn't get involved unless the cost number has 7+ digits. Greenimi is caught between a rock and a hard place. Production Operations will come after him if he approves a fixture that won't work, and Purchasing and Program Management will come after...

Greenimi, I'm assuming you are within GM. Do you have a communication channel to the Product Development group that designs the parts that the gauge gauges, or the Purchasing group that buys the parts and gauges? The best solution (which you probably already know) is to get the gauge...

Your GM Standard citation looks like it might be generally covering things like body panels. I would think that for precision features invoking part 3 would be pretty obvious. I think they are mis-applying part 2.b. On what types of parts are you working, and what is your specific role? Even...

... also, in equation (5), the summing operator should be inside the square root operator. Best regards, Doug Hunter Altarium Technical Consulting https://www.altarium.us/

Greenimi, Unfortunately, I don't have a document in hand or mind that defines this. Your reference from GM, along with Mech1595's ASME Y14.43 reference, communicate the 10% guidance. I know that Ford and Chrysler generally use the same guidance, and in discussions in which I've participated...

Equation (1) is correct. Equation (2) has an algebraic error: the right side is inverted. Equations (3) and (5) are correct. Equation (4) needs to be reworked based on equation (2). Best regards, Doug Hunter Altarium Technical Consulting https://www.altarium.us/

Greenimi, Well, you could call them A1, A2, A3... if you like. My recommendations are ways to apply gauging standards while respecting the functional issues with the part. Regarding the 10%, this is a common target (at least in automotive) for keeping gauging errors below the range of that...

Hi, Never depart from your basics. Make a free body diagram for each of the 3 links. Once you algebraically determine the X-Y forces acting at point B-C, then the portion normal to the link B axis can be used to calculate your torque. Your algebra will need to be done in terms of the linkage...

Petkov, I agree with how you are thinking about this. Considering all aspects of your specific situation, I recommend: Recommendation A: 1.) Establish the A & B datums at the remotest bearing supports. 2.) Establish C, D, E... datums as needed at the other bearing supports in between 3.)...

It looks like we were writing at the same time. I think the math would work out the same between your equation and the method that I described. I'll let you derive/check it. One important point, again, is that it's better to use Cp with the drawing nominal instead of Cpk, unless your process...

Hi Gavin, By "RSS tolerance analysis", I am assuming you mean Root-Sum-Squares calculations applied to tolerance stack-ups to achieve a 'statistical' result as opposed to an absolute arithmetic result. The RSS calculation is applied to the tolerances/variations of the individual factors in the...

To filter fine plaster dust, I think you'll need a filter with a paper element. That metal mesh probably won't catch it. It would be helpful to understand your smallest particle size to be filtered, and then you can buy a filter that is rated for it. Best regards, Doug Hunter Altarium...

You may want to add some pictures of the mechanism. My initial impression is that your proposed system will bind and your shaft will move off axis when the shaft support at the right side is removed (I'm assuming there is a bearing at both ends). Also, replacing a worm gear pair with a spur...

Should be no problem doing what you propose. It is done all the time. However, I would go back to A-D on the 3 dependent holes, not D-B. I'm not familiar with "true geometric counterparts", so I can't comment on that. Best regards, Doug Hunter Altarium Technical Consulting...

I agree with LittleInch (again). I'll add that if the code/standard doesn't specify it, then you can safely assume that it is not required. Best regards, Doug Hunter Altarium Technical Consulting https://www.altarium.us/

I personally don't know those codes, but I would think that the codes themselves would give you your answer. Is the issue that you don't have the actual codes available to read, or that you don't have the time to read them? Best regards, Doug Hunter Altarium Technical Consulting...

bernoulli313, Thanks for clarifying. I've got nothing to add to what LittleInch is advising. Best regards, Doug Hunter Altarium Technical Consulting https://www.altarium.us/

Hello, I would think that it would be stated within the "international applicable standards and codes" themselves. The requirements of the standards would be different depending on the application/industry and specifically the safety and cost risks involved. If you are a valve purchaser, I...

Hello, Please clarify the X-axis of the chart. Is it pipe length? Is conductance a measure of resistance for the piping, or something else? I've not worked with these circuits, but I have worked with automotive vacuum pumps. The pumps are usually primarily specified by their displacement...

The Machinery Handbook might give more background on the history you seek. Best regards, Doug Hunter Altarium Technical Consulting https://www.altarium.us/