I have been using +/+ or -/- tolerances for a while now with no problems. For ex.: shaft 3" +.005/+.010, hub 3" -.005/-.010. Means shaft can be 3.005 to 3.010 and hub 2.995 to 2.990. This keeps my dimensions simple, clear and clean but tolerances drive the machining limits.
Lately somebody started questioning my sanity on this practice. Is this technique I use to GD&T standards?
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