I have a callout for a .250 dia. hole with the letters w.h. next to it can anyone please tell me what it means. The hole appears to have no functional purpose.
Anyone with CMM experience please! Is it practical to probe a cast surface to establish Datum A. I am afraid this is throwing some numbers out of whack. I would think you would probe a truer surface and then set the part on that?
So I'm drafting up some process prints for a run of new tombstones we have in our shop. Aside from the surfaces being machined we are putting a dowel hole pattern on the faces. We are looking to control the location of these holes to the bottom and to the center of the tombstone, which I...
Can anyone please clarify if a perpendicularity call out is controlled by a basic dimension or not? In other words is the tolerance zone centered on a basic dimension?
