Here's a question for you gagemakers and tool and die makers.

At work, I had to make a go/no-go gage to measure a production tool
(precise welding electrode). The electrode has a set screw for
adjusting the length. The nominal length and tolerance of the
electrode is 57.50 +/- 0.50 Meaning that length should fall between
57.00 to 58.00 It is very critical that the length doesn't go below
57.00 nor exceed 58.00 Normal machine operators would be adjusting the
lengths using this go/no-go gage. I was afraid that the machine
operators would adjust the electrode lengths a little bit out of
tolerance. (My experience in the past led me to that conclusion.)
Therefore, I made a go/no-go gage that measured 57.10 to 57.90 This
ensured that the electrodes would not go out of tolerance if the
operators had a little error in measuring the tool. And this method
worked perfect. My tool and die maker partner insists that I should
have made the gage to the true tolerance regardless of the operators
using them. I disagreed.

Is there a particular name for this type of gage that I made? It
doesn't measure the true tolerance of the electrode. Is designing this
type of gage a bad method for gagemaking, or is it a common one in the
industry?