Ok, it has been a long time since math class. We just got a new print with this dimension .2917+/-.0005 :1 -this feature is deals with an included angle.

What the heck does this mean again? I know it changes for every inch. I just don't know anything else.

Thanks

Are you saying a tolerance for an included angle is expressed in ten-thousandths of an inch in a ratio?

No, if i remember right the ratio applies to every inch in length. if the length doubles, so does the tolerance. The angle is only .652" long.

No, if i remember right the ratio applies to every inch in length. if the length doubles, so does the tolerance. The angle is only .652" long.

It's .017" per degree per inch (if I understand what you're looking for). I don't recall offhand anything past the third decimal place.

So what does .2917 +/- .0005 : 1 mean??

Thanks for the info

So what does .2917 +/- .0005 : 1 mean??

Thanks for the info

I wouldn't hazard a guess without seeing the drawing.

Ok, it has been a long time since math class. We just got a new print with this dimension .2917+/-.0005 :1 -this feature is deals with an included angle.

What the heck does this mean again? I know it changes for every inch. I just don't know anything else.

Thanks

Without seeing the print, here is my first take: Angles can be expressed as minutes and seconds. I believe the :1 is refering to either minutes or seconds of a degree. They may be trying to express the tolerance as +/- ten minutes/seconds of a degree. It seems as though they are expressing the dimension as an arc and not linear.

Ok, it has been a long time since math class. We just got a new print with this dimension .2917+/-.0005 :1 -this feature is deals with an included angle.

What the heck does this mean again? I know it changes for every inch. I just don't know anything else.

Thanks

I agree with my Fellow Covers...Without a drawing it is a wild guess....

A partial drawing will suffice as long as we can see the feature that this applies to and the dimension. If this is a customer drawing...call them and ask.

Stijloor.

Ok, it has been a long time since math class. We just got a new print with this dimension .2917+/-.0005 :1 -this feature is deals with an included angle.

What the heck does this mean again? I know it changes for every inch. I just don't know anything else.

Thanks
Did you get your question answered?

Another way to view it is that they are allowing 0.0005 tolerance per inch of bore. If you had a 10 inch bore, you'd get ±0.005. While I'm having trouble seeing where this would be helpful, it does make some sense.