|Direct Measurement Gage is adjusted
so indicator reads zero with contact touching the reference point or surface.
Gage shows actual size of part. Indicator dial is usually continuous.
|Comparative Measurement Gage is adjusted
so indicator reads zero with a master or nominal size part in gaging position.
Gage shows plus or minus deviation from nominal for each part checked.
Indicator dial is usually balanced.
- A flat end referenced contact
– A flat wide reference surface, sometimes referred to as a “table”.
– The top surface of a gage or comparator base. Usually serves as a reference