Fowler AGD Dial Indicators

The Fowler dial indicator  (AGD) Group 2  has a 2-1/4″ dial face with continuous and balanced dial readings, a 1″ measuring range, 0.001″ graduations, a revolution counter, and tolerance markers, and is designed for taking measurements in machining, layout, and inspection work. The movement is mounted independently from the case on a rigid supporting plate to ensure perfect and permanent alignment. The dial has microfine black graduations for 0-100 continuous readings. A knurled bezel rotates 360 degrees to zero the reading at any location. Tolerance markers allow operators to quickly observe limits. The lug back can be rotated at 90-degree increments. A satin-chromed forged-brass case, hard brass gear wheels, and a hardened steel spindle rack provide long wear. The indicator is dustproof, waterproof, oil-proof, coolant-proof, and shockproof.
Dial readings with three digits, 0-10-0 for example, signify that the indicator has a balanced dial. Dial readings with two digits, 0-100 for example, indicate the dial has a continuous dial. Balanced dials are used for reading the difference from a specific surface reference point. Continuous dials are used for direct readings and usually have a larger measurement range than balanced dials.