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.