Most any machine shop WILL have gauges, but a smart shop asks the customer to spec what they want and annotate that on a work order. If the owner has an issue its a simple matter of "We did the work to your specs". A shop owner I worked with (We rented space in his facility, and he made parts for OUR operation)
had a favorite saying.. "I made it to print" but sometimes shop floor people would horde print copies and the problems occur when the floor guys are operating on Rev2 and you promised the customer Rev3. My wifes machine shop deals with this daily.
Greybeard, thank you for illustrating that discussion with your pictures. I have gauges for some applications, but often have discussions with people on these types of cam followers and trying to illustrate what is meant usually gets a blank stare. Sometimes (I do) we focus in on the details and overlook simple solutions. Instead of trying to sort out the std radius and a "R" radius for a Triumph, a simple graph like yours is so much easier. Dont know WHY it never occured to me to do the same,
But thanks for that.