Gr&r 5-2-2

[dandrewsca]

Hi Guys, I hope someone can help. We are doing a GR here and the callout is an angle ±1°. I know that the calculation is 0.026" per inch and my part is measured about 2" from the center. Anyone have a better way to calculate the tolerance for the GR?
Thanks
Dan

[Matthew D. Hoedeman]

Hi Guys, I hope someone can help. We are doing a GR here and the callout is an angle ±1°. I know that the calculation is 0.026" per inch and my part is measured about 2" from the center. Anyone have a better way to calculate the tolerance for the GR?
Thanks
Dan

I have never heard of anyone doing a gage-r on that type of feature, only locations. I mean, the angle of the part is dependant on the part, not the fixture, you need to see if the part sits on the fixture in the same place every time, so a simple location should do it. Also, all features measured for teh gage-r SHOULD have the tightest tolerance for the part, even if that point will get a bigger tolerance for checking the part, the entire fixture MUST pass to the tightest part tolerance.

[rangerboat72]

I have never heard of anyone doing a gage-r on that type of feature, only locations. I mean, the angle of the part is dependant on the part, not the fixture, you need to see if the part sits on the fixture in the same place every time, so a simple location should do it. Also, all features measured for teh gage-r SHOULD have the tightest tolerance for the part, even if that point will get a bigger tolerance for checking the part, the entire fixture MUST pass to the tightest part tolerance.

WMHS...

[cmmguy]

Hi Guys, I hope someone can help. We are doing a GR here and the callout is an angle ±1°. I know that the calculation is 0.026" per inch and my part is measured about 2" from the center. Anyone have a better way to calculate the tolerance for the GR?
Thanks
Dan

NEI

[dandrewsca]

Matt,
The only feature that is important on the part is the location of the tube that has the angular tolerance so I really wanted to use the location in X&Y to validate the gage-r. I just wanted to make sure I was being fair to the fixture if I used the 0.026" per inch.

[dandrewsca]

WTF - does WMHS & NEI mean? LOL

[rangerboat72]

WTF - does WMHS & NEI mean? LOL

What Matt Hoedeman said and not even inclusive????

[Matthew D. Hoedeman]

Matt,
The only feature that is important on the part is the location of the tube that has the angular tolerance so I really wanted to use the location in X&Y to validate the gage-r. I just wanted to make sure I was being fair to the fixture if I used the 0.026" per inch.

OK, you are NOT trying to USE an angle for the gage-r, just trying to figure out what tolerance you should use for a point on this angle for a location tolerance, is that it?

Well, 1 degree = 0.017452406" per inch of length and if this feature is 3 inches long, that would give a tolerance at the 3 inch mark of 0.052357219" total or +/- 0.02617861"

SO, if you have +/-1 degree, you would double those values. Of course, the angle tolerance applies to the entire length, so the closer you are to the 'corner', the less tolerance you have.

[EHines]

WTF - does WMHS & NEI mean? LOL

Wille may have soup and not everyone itches.

ITEKT

[rangerboat72]

Wille may have soup and not everyone itches.

ITEKT

Oh, IDKT...

[dandrewsca]

Thanks for the info...

[cmmguy]

Not enough information