Quality, Tolerance & Surface
Tolerance, fit, roughness, and quality checks.
Angular Tolerance
Permissible deviation of angular dimensions.
Circular Runout
Runout deviation of a single cross-section during rotation.
Clearance Fit
Fit where hole size is larger than shaft size.
Coaxiality
Deviation in concentricity between two axes.
Cylindricity
Overall deviation of a cylindrical surface.
Datum
Reference feature used for inspection or machining.
Dimensional Tolerance
Permissible deviation for a nominal dimension.
Fit
General term for hole-shaft fit relationships.
Flatness
Deviation of a surface from an ideal plane.
Geometric Tolerance
Control of allowable shape and position deviations.
Inspection
Measuring and evaluating dimensions and quality.
Interference Fit
Fit where hole size is smaller than shaft size.
Parallelism
Deviation from parallelism to a datum.
Perpendicularity
Deviation from perpendicularity to a datum.
Position Tolerance
Deviation of a feature position relative to a datum.
Profile Tolerance
Deviation of a line or surface profile.
Quality Control
Management activities ensuring stable product quality.
Ra
Arithmetic average roughness parameter.
Rework
Corrective machining performed on nonconforming parts.
Roundness
Circularity deviation of a circular cross-section.
Rz
Maximum roughness height parameter.
Straightness
Straight-line deviation of a linear feature.
Surface Quality
Comprehensive indicator describing surface condition.
Surface Roughness
Measure of microscopic surface irregularity.
Surface Texture
Pattern left on the surface after machining.
Tolerance
Permissible range of dimensional deviation.
Tolerance Stack-Up
Dimensional relationship formed by multiple chained dimensions.
Total Runout
Total surface runout deviation during rotation.
Transition Fit
Fit condition between clearance and interference.
Yield Rate
Ratio of qualified products to total output.