For measuring a displacement over a given number of gear teeth, closely spaced sections, ribs, keys and fins etc.
Measurable gear pitch: 0.5 - 6 module.
Graduation: 0.01mm (.001").

Parallelism: 0 - 50mm 4µm, 50 - 100mm (4+L/50)µm.
Flatness: 1µm.
Instrument error: 0 - 50mm ±4µm, 50 - 100mm ±6µm.
L = maximum measuring length.
Disc Diameter 20mm