Casting Tolerance Guide
This guide explains how to specify dimensions for manufactured components so the result matches your intent. Good tolerance specification reduces cost, avoids unnecessary machining and prevents fit problems at assembly.
As-Cast vs Machined
As-cast features are economical but hold wider limits. Features that must mate with other parts — sealing faces, bores, threads and locating surfaces — are brought to tighter limits through CNC machining.
Capability Reference
Specifying Dimensions
- Mark only the features that truly need tight limits as machined.
- Reference international standards so inspection maps to your drawing.
- Keep wall thickness and draft angles manufacturing-friendly.
Request a Quote
Send your drawing with tolerances and we will return a feasibility review.