Is Your CNC Part Actually Correct? First-Part Inspection & Tolerances | Lesson 11

A finished CNC cycle doesn’t guarantee a correct part. Learn how to compare your first machined part with its drawing and record meaningful inspection results. In Lesson 11 of CNC Milling for Beginners, we explain: • Reading dimensions, tolerances, and drawing notes • Calculating limits for 0.500 ± 0.005 inch • Choosing suitable measuring instruments • Why resolution and accuracy are different • How burrs, temperature, alignment, and measuring force affect readings • Checking hole diameter, depth, and location separately • Understanding inspection references • Recording actual measurements • Investigating unexpected results before making corrections Follow clear diagrams and practical examples to build your understanding of first-part inspection. Use the drawing, approved inspection plan, and measurement methods required for your job. Subscribe to Know-How Compass for practical skills and clear lessons. ▶ Next: Lesson 12 — Common Machining Problems and How to Investigate Them. #FirstPartInspection #CNCMachining #MachiningTolerances #KnowHowCompass #CNCForBeginners #Metrology #QualityControl #Machinist