Quality Standards
Dimensional tolerances
Normal Dimension of rough casting Overall Dimension (In Millimeter) [IS - 11166 Class II]
over up to Up to 6mm Over 6 Up to 10 Over 10 Up to 18 Over 18 Up to 30 Over 30 Up to 80 Over 80 Up to 180 Over 180 Up to 300 Over 300 Up to 500
6 0.1 0.12 0.15 0.2 0.2 0.25 0.3 0.35
6 10 - 0.12 0.15 0.25 0.25 0.3 0.35 0.45
10 18 - - 0.2 0.3 0.3 0.35 0.4 0.55
10 30 - - - 0.3 0.3 0.45 0.5 0.65
30 80 - - - - 0.3 0.55 0.6 0.75
80 180 - - - - - 0.6 0.7 0.9
180 300 - - - - - - 1 1.15
300 500 - - - - - - - 2
Tolerance for straightness, flatness, parallelism, shape
Precision class Length of the tolerated element
to 25 mm 25 to 50 mm up to 50 mm
allowed difference
D1 0.15 mm 0.25 mm 0.60%
D2 0.10 mm 0.20 mm 0.40%
Tolerance for angle values and right angles
Precision class Nominal dimensions
to 30 mm 30 to 100 mm 100 to 200mm up to 200mm
D1 Allowed deviation
minute degree 30 30 30 20
mm / 100 mm 0.87 0.87 0.87 0.58
D2 Allowed deviation
minute degree 30 20 15 15
mm / 100 mm 0.87 0.58 0.44 0.44
Surface quality according to ISO R 468, DIN 4769 and VSM10321
Ra Rz Rt
N9 6.3 23-32 25-38