I believe you can use profile without referencing datums in the feature control and without basic dimensions to control the orientation only
I could add datum A in the profile callout to hold the surfaces parallel to A and to themselves by calling out 4 surfaces in the callout?
Chez311, for sure, can't have a position tolerance without out FOS, I was kicking around the idea of holding the surfaces of the flats with a profile callout instead. That way, I wouldn't have to deal with the center plane of the features, which I don't want to be involved.
Nice catch, I fixed it. Attached a new drawing.
I want datum B to be driven from all four flats as a pattern and keep them oriented together tightly and perpendicular to -A- tightly as well. but the center plane of them or the size doesn't matter to me. Then when I tolerance the 8-32 holes, I...
Thanks for the replies!
I agree with the mistake, there is only one diameter. I will fix that.
The flats are just for a set screw to orient the tool holder at 90° increments to the lathe (the 8-32 threads that hold the turning tool orientation to the flats). This is very important. If the...
I'm drafting a sleeve for a screw machine tool. I'm having a little trouble getting the dimensions and tolerances for the four flats around the outside.
I set the primary datum -A- to the tightly held outside diameter which will be sliding into the tool block on the lathe. This will hold the...
