For zero setting of inside micrometers, three points internal micrometers and bore gages.
Deviation is the difference between the ordered size and the size marked on the setting ring when supplied.
For example, the ordered size is .2”, the size marked on the setting ring when supplied may be .20008″.
setting ring when supplied may be .20008″.

Dynabrade 54793 4" (102 mm) Dia. Extended Right Angle Type 27 Depressed Center Wheel Grinder, Steel Housing, .7 HP, 13,500 RPM, 3/8"-24 Spindle
Dynabrade 78055 1" W x 24" L Medium NWN DynaBrite Belt, 10/pack
Insize 7341-13S, PIN GAGE HANDLE (with 1pc handle and 4 pairs of collecting bushes), .704-.760", 6928640360718
3M 17183, Scotch-Brite Roloc EXL Unitized Wheel TR, 2 in x NH 2S FIN, 7000045976
Standard Abrasives 713297, Aluminum Oxide Handy Roll, P120 J-weight, 2 in x 50 yd, 7100031623
3M 70888, Sanding Belt, 9272NA-2, 3 in x 24 in, Fine, 120 grit, 7010332264, 2per pack, 10 packs per case 