Roundness and Cylindricity
Roundness and cylindricity can be measured using two general types of measurement:
- Both dimensions can be measured using an intrinsic datum, using the part itself as the reference. Tools that may assist in this type of measurement include:
- Micrometers
- Vernier calipers
- Vblock and dial gauge
- Rotation between center
2. An extrinsic datum can be provided by a precision spindle that serves as a reference. The following are examples of using an extrinsic datum:
- Rotating spindle method
- Rotating part method