YILIU / PRECISION MACHINING

Part Tolerance, Machine Accuracy and Measurement Resolution

Three different concepts that should not become one unsupported capability claim.

Inspector in a YILIU work jacket measuring a component; illustrative brand scene
Illustrative brand & component imagery

Tolerance is a part requirement

Dimensional tolerances define allowable variation in size; geometric tolerances control form, orientation or location. Consistent conformance depends on material, geometry, size, workholding, processing and inspection. A machine specification does not establish a universal tolerance promise for every component.

Accuracy and repeatability differ

Positioning accuracy describes deviation from a target position; repeatability describes the consistency of returning to a position. Temperature, loading, tool wear and calibration affect actual results. Axis travel describes machine movement, not an unconditional workpiece envelope for every geometry.

Resolution is not measurement accuracy

Resolution is the smallest increment an instrument distinguishes or displays. It does not independently establish measurement uncertainty or machining tolerance. Critical features need appropriate instruments, methods, environmental conditions and calibration. Agree on the reporting scope during quotation.

Check equipment and RFQ documents

Cross-check equipment information with the factory inventory and original literature. General process guidance does not replace the customer drawing or project agreement.

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This guide explains general purchasing and manufacturing considerations, not a quality guarantee for a specific component. Actual processing requires review of the drawing, material and inspection requirements.

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