Quality Precision Investment Casting Solutions

Tolerance

Linear Tolerances

Nominal size mm D1 Tolerance (general dimensions) D2 Tolerance(some functional dimensions)
0 to 6 ±0.15 ±0.12
6 to 10 ±0.18 ±0.14
10 to 18 ±0.22 ±0.17
18 to 30 ±0.26 ±0.20
30 to 50 ±0.40 ±0.31
50 to 80 ±0.45 ±0.37
80 to 120 ±0.55 ±0.44
120 to 180 ±0.8 0 ±0.65
180 to 250 ±1.20 ±0.95
250 to 315 ±1.30 ±1.10
315 to 400 ±1.80 ±1.40

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 0.6%
D2 0.10 mm 0.20 mm 0.4%

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