GDT:Total Runout
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Revision as of 21:21, 14 January 2026 by Admin (talk | contribs) (Created page with "{{Author Credit |author=Admin }} {{GDT Infobox |symbol=Total Runout |type=Runout |category=Runout |standard=ASME Y14.5 |author=Admin |datums=Primary datum required; secondary optional; tertiary not allowed |modifiers=Material condition modifiers where allowed; ST where allowed |tolerance_zone=Runout over the full surface relative to datum axis |image=<!-- TODO: add diagram file name --> |mistakes=Missing datum reference; applying runout to...")
| Symbol | Total Runout |
|---|---|
| Type | Runout |
| Category | Runout |
| Standard | ASME Y14.5 |
| Author | Admin |
| Datums | Primary datum required; secondary optional; tertiary not allowed |
| Modifiers | Material condition modifiers where allowed; ST where allowed |
| Tolerance zone | Runout over the full surface relative to datum axis |
| Image | |
| Common mistakes | Missing datum reference; applying runout to a pattern; using tertiary datum |
| Related | F4:Total Runout Validation |
Summary
Total runout controls variation of the entire surface as it rotates about a datum axis.
Definition
The entire surface must stay within the total runout tolerance zone as the part is rotated about the datum axis.
When to use it
Use total runout to control the full-length form and coaxiality of a rotating surface relative to a datum axis.
Examples
Example: Total runout relative to datum axis
Total runout applied to a cylindrical surface with datum A as the axis.
Common mistakes
- Missing the primary datum reference.
- Adding a tertiary datum reference.
- Applying runout to a pattern.