255 1. Regular Cut Dimension Tolerance B 0405—1991 Tolerances in Respect of Length Excluding Chamfered Portion Unit: mm 2.Tolerances in Respect of the Length of the Chamfered Portion (Radius of rounding for edges and edge chamfering dimension) Unit: mm 4.Regular Perpendicularity Tolerance B 0419—1991 Unit: mm 5. Regular Straightness and Flatness Tolerance Unit: mm 6.Regular Symmetry Tolerance Unit: mm 3. Angle Tolerance Tolerance Class Classification of Reference Dimension Symbol Description 0.5 ( 1 ) or More 3 or Less More than 3 6 or Less More than 6 30 or Less More than 30 120 or Less More than 120 400 or Less More than 400 1000 or Less More than 1000 2000 or Less More than 2000 4000 or Less Tolerance f Precision Grade ±0.05 ±0.05 ±0.1 ±0.15 ±0.2 ±0.3 ±0.5 − m Medium ±0.1 ±0.1 ±0.2 ±0.3 ±0.5 ±0.8 ±1.2 ±2 c Coarse ±0.2 ±0.3 ±0.5 ±0.8 ±1.2 ±2 ±3 ±4 v Extremely Coarse − ±0.5 ±1 ±1.5 ±2.5 ±4 ±6 ±8 Note ( 1 ) : A reference dimension less than 0.5 mm is followed by a tolerance. Tolerance Class Classification of Reference Dimension Symbol Description 0.5 ( 2 ) or More 3 or Less More than 3 6 or Less More than 6 Tolerance f Precision Grade ±0.2 ±0.5 ±1 m Medium c Coarse ±0.4 ±1 ±2 v Extremely Coarse Note ( 2 ) : A reference dimension less than 0.5 mm is followed by a tolerance. Tolerance Class Nominal Length of Shorter Side 100 or Less More than 100 300 or Less More than 300 1000 or Less More than 1000 3000 or Less Perpendicularity Tolerance H 0.2 0.3 0.4 0.5 K 0.4 0.6 0.8 1 L 0.6 1 1.5 2 Tolerance Class Nominal Length 10 or Less More than 10 30 or Less More than 30 100 or Less More than 100 300 or Less More than 300 1000 or Less More than 1000 3000 or Less Regular Straightness and Flatness Tolerance H 0.02 0.05 0.1 0.2 0.3 0.4 K 0.05 0.1 0.2 0.4 0.6 0.8 L 0.1 0.2 0.4 0.8 1.2 1.6 Tolerance Class Nominal Length 100 or Less More than 100 300 or Less More than 300 1000 or Less More than 1000 Symmetry Tolerance H 0.5 K 0.6 0.8 1 L 0.6 1 1.5 2 Tolerance Class Length of Shorter Side (Unit: mm) Symbol Description 10 or Less More than 10 50 or Less More than 50 120 or Less More than 120 400 or Less More than 400 Tolerance f Precision Grade ±1° ±30' ±20' ±10' ± 5' m Medium c Coarse ±1°30' ± 1° ±30' ±15' ±10' v Extremely Coarse ±3° ± 2° ± 1° ±30' ±20' GeneralTechnical Information Roughness Ranges by Various Processes
RkJQdWJsaXNoZXIy MTc2MTk0OA==