After learning the GD&T concepts, many participants find that they need a methodical way of adding these tolerances into an overall stack-up analysis. The 2-day Tolerance Stacks program is designed for engineers and others who work with stacks.
While there is no standard way to do stacks, a spreadsheet method is introduced which allows for both traditional plus/minus tolerances as well as geometric tolerances. We even teach how to handle the MMC “bonus” and “shift” tolerances, which are sometimes ignored, even in “worst-case” stacks.
- What are tolerance stacks?
- Review of GD&T
- Calculating the virtual condition
- Introduction to the stack form
- How to identify the stack path
- Entering traditional tolerances on the stack form for a part
- Entering traditional tolerances on the form for an assembly
- How to handle stacks with runout and concentricity
- How to handle stacks with profile and position
- MMC bonus tolerance in the stack
- Shift tolerance in the stack
- How to handle stacks with form and orientation
- Statistical stacks—root-sum-square (RSS) formula
- Variations of the RSS formula
This course can be made available for your entire group, and can be customized based on your needs and time constraints.
Occasionally we offer this class as a “public” seminar, which is ideal for individuals or companies that do not have enough participants to host an on-site class. If this might interest you, contact us to ask about upcoming dates and locations.