3DDave
Aerospace
- May 23, 2013
- 11,085
The more I look at that the less satisfying that figure is. A 1mm diametral allowance on a pair of what look to be flared tubing fittings that may be only, based on eyeball scaling, 8 mm of engagement? That's a 7 degree allowable deviation for each - they could have a 14 degree spread or convergence between them. With a 20mm thread, those tubes aren't bending easily to fit.
If it's just an example for the use of a pattern as a datum feature, there is no need to have the wonky position tolerance that is not explained. They could better have used a profile of surface tolerance symbol to control the boundary of the base and have it simply be a flat plate with no other features.
If it's just an example for the use of a pattern as a datum feature, there is no need to have the wonky position tolerance that is not explained. They could better have used a profile of surface tolerance symbol to control the boundary of the base and have it simply be a flat plate with no other features.