Toleransbudget
Toleransbudget is a concept in design and manufacturing that refers to a planned distribution of permissible dimensional variations across the components of an assembly. The goal is that the finished product remains within its functional requirements despite inherent manufacturing variation and measurement uncertainty. By allocating a toleransbudget, engineers can balance manufacturability, cost, and quality, and provide clear expectations for suppliers and production teams.
To create a toleransbudget, the functional requirement of the assembly is defined and the critical dimensions
The budget is iteratively refined as design and manufacturing data become available. Benefits include reduced risk
Example: In a simple shaft-and-hub fit requiring a target clearance of 0.50 mm with a tolerance window