Does anyone have any information or ideas on straightness inspection of thin bars.
I am trying to measure 1/4 aluminum extruded material to what the standard, I believe is, .002 / Ft.
We are buying 12Ft bars. The finished product is 18" long.
Any advice? Thank you in advance
Hello
I'm trying to determine the minimum and maximum force that we can expect in lbs measured after we press a pin into a hole.
The pin is .0582/.0578 Dia x .1 long 420 SS ground finish
The hole is .0579/.0574. 17-4 stamped in .055/.053 thick material 50/50 shear to break
No lubrication...
Maybe calling out dimension from tooth to tooth incrementally and adding a "non-accumlative" callout. Meaning that every tooth of the comb must not stray from the true position from the origin and the very last tooth of the comb will be in tolerance to the origin of dimension.
ringman
I have no idea when this drawing was prepared. From what I understand we have been making this part for a couple of years and to dingy2's point we have not considered this up until this time. The only reason it even came up is that there was gross curvature on a part (rocking on the...
I think I found it.
For anyone who is interested. In Modern Geometrical Dimensioning And Tolerancing by Lowell W Foster along with the National Tooling and Machining Association or NTMA, the following was stated:
Rule 1 - Limits of Size Rule. Where only a tolerance of size is specified...
People are telling me that the assumed flatness callout would br the total tolerance of the thickness callout eg. .2787-.2745=.0042. Even if I agreed with them about that, which I don't, they take it another step and say that if I run to the max of my tolerance (.2787) I will have .0000...
People are telling me that my flatness is assumed to be the total tolerance zone eg. .2787-.2745= .0042. That would be fine, even though I don't know if that is even correct, but they take it a little farther and state that if I run at the high end of the tolerance I have .0000 allowable...
Hello, I'm having a debate with others to interpret the assumed flatness or straightness on a thickness or "bow" callout. The spec is Ansi 14.5M-1982. The thickness callout is .2787-.2745. Do I get RFS and the measured "bow" or do I have to place the part down and the entire form has to fit...
I'm trying to develope a simple calculator (in Excel)to compute machine hourly rate and operator hourly rate, combined with net profit, in order decide whether to run 1 machine with one operator (eg. with thruput efficiency of 97%) or two machines with one operator (eg. with thruput efficiency...
The true position callout is assumed RFS so the example in the book ASME Y14.5M-1994 does't quite match my situation. So do I lose "clocking" tolerance to B for every .001 used (off-center) on Datum A?
I have an extruded shape - round on the outside and round except two "key-ways" 180 degrees apart on the inside. The OD is Datum A and the keyways are Datum B. I have to machine a slot in the end; Looking down at the end (the cross section if you will) I will endmill a slot central to a depth...
Hello, in a press shop I need to weigh very small parts (30-20 g) and need to read to +/- .5 g. I'm afraid the vibrations may cause incorrect readings. Is there any dampening materials or methods I can use to isolate the measuring equipment. Also how can I measure magnitude in the shop. Thanks
