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 48345 .4 hp Straight-Line Die Grinder, Rear Exhaust, 30,000 RPM, 1/8" Collet
Dynabrade 52378 3" (76 mm) Dia. Straight-Line Type 1 Extension Wheel Grinder, 1 HP, 18,000 RPM, 3/8"-24 Spindle
Dynabrade 95848 Dynabrade Gear Oil
Dynabrade 96101 Dynabrade Air Lube 10W/NR 24 Per Box
3M 27703, Cubitron II Roloc Durable Edge Disc 984F, 36+, YF-weight, TR, Maroon, 4 in, Die R400BB, 7100006571, 100 per case
Dynabrade 11517 Idler Arm
Dynabrade 01480 Vane Set (4pk) 
