Understanding Tolerance Grades in CNC Machining: A Practical Guide
Tolerance grades define the acceptable deviation from a nominal dimension. IT grades 01-1 are reserved for precision instruments, while grades 8-16 suit general manufacturing. Selecting the right grade balances cost, machinability, and functional requirements. Over-specifying adds unnecessary expense without improving performance.
Sample content for illustrative purposes. Reviewed by a mechanical engineer with 15+ years of CNC and quality systems experience.