GD&T Cylinder Parallelism
Written by Michael Cone
Updated at February 5th, 2026
- VTube Update Articles
- VTube Technical Articles
- Downloadable Resources
- VTube Videos
- Measuring Devices
- Utility Software
- Partners
- Benderlink Hardware
- Bending Terminology
- Benderlink Software
- Benderlink Update Articles
- CNC Bender ProControl
- Bender to XYZ
- General Software Topics
- Windows Technical Articles
- TubeCAD
Cylinder parallelism is the maximum value of the measurement of the taper of the cylinder.
It is calculated as the parallelism of two least squares lines constructed through the vertical sides of the profile.
Advanced Tubular Note: GD&T profile of a cylinder is similar but not quite the same - because the profile value gives the maximum distance of the high and low of a surface relative to its nominal.