Tolerance

Investment Casting Cast Holes Permissible Deviations on Dimensions, as per IS 11166:1993 Class 2
Nominal Dimensions of Rough Casting Overall Dimensions in mm. Center Distance Tolerance For Holes & Bosses
Over Up to Up to 6 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 ± 0.10 ± 0.12 ± 0.15 ± 0.20 ± 0.25 ± 0.25 ± 0.30 ± 0.35 ± 0.12
6 10 ± 0.12 ± 0.15 ± 0.25 ± 0.25 ± 0.30 ± 0.35 ± 0.45 ± 0.12
10 18 ± 0.20 ± 0.30 ± 0.35 ± 0.35 ± 0.40 ± 0.55 ± 0.15
18 30 ± 0.30 ± 0.40 ± 0.45 ± 0.50 ± 0.65 ± 0.25
30 80 ± 0.55 ± 0.55 ± 0.60 ± 0.75 ± 0.35
80 180 ± 0.60 ± 0.70 ± 0.90 ± 0.45
180 300 ± 1.00 ± 1.15 ± 0.70
300 500 ± 2.00 ± 0.90
Cast holes
Hole Diameter(mm) Maximum length or Depth (mm)
D Through Hole Blind Hole
2-4 1.0*D 0.6*D
4-6 2.0*D 1.0*D
6-10 3.0*D 1.6*D
>10 4.0*D 2.0*D

Surface Finish: Surface finish of our Castings will be 3-6 microns of surface roughness.

Tolerances: We follow Indian Standard is: 11166:1993 class-2 or ISO: 2768 M for unspecified dimensions.