technical
Information contained within this section is subject to our disclaimer. You are invited to discuss your particular requirements with us.
premium grade investment casting by the 'lost wax process'
Cast material
Please click on the links below to open PDF documents:
Tolerances and sizes
commercial grade investment casting
Cast material
- Grey iron
- Ductile iron
- SG Iron
- High Chrome Iron
- White irons
- Carbon Alloy Steels
- Process capabilities
- Cast surface roughness for example 0.2% Carbon steel 12.5-25.4RA
- Minimum and maximum weight limitations From 10g to 100kg
- Minimum and maximum size limitations .100mm – 1000mm
- Draft angles required per process +/-1-3 degrees
Tolerances and sizes
Size of casting mm |
+/- Tolerances mm |
- |
10 |
0.52 |
10 |
16 |
0.54 |
16 |
25 |
0.58 |
25 |
40 |
0.64 |
40 |
63 |
0.7 |
63 |
100 |
0.78 |
100 |
150 |
0.88 |
150 |
250 |
1.25 |
250 |
400 |
2.00 |
Please note: The above tolerances can vary dependant on shape and material.
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sand casting
Cast material
- Grey iron
- Ductile iron
- SG Iron
- High Chrome Iron
- White irons
- Low Carbon Alloy Steels
- Aluminium Alloys
- Copper based alloys
Tolerances and sizes
Size of Casting mm |
Tolerances mm |
> |
< or = |
Green Sand & Vacuum |
Resin Sand |
|
10 |
2 |
1 |
10 |
16 |
5 |
1 |
16 |
25 |
2 |
1 |
25 |
40 |
2 |
1 |
40 |
63 |
2 |
1 |
63 |
100 |
2 |
2 |
100 |
150 |
3 |
2 |
160 |
250 |
3 |
2 |
250 |
400 |
3 |
2 |
400 |
530 |
4 |
3 |
630 |
1,000 |
4 |
3 |
1,000 |
1,600 |
5 |
3 |
1,600 |
2,500 |
5 |
4 |
2,500 |
4,000 |
6 |
4 |
4,000 |
6,300 |
7 |
|
6,300 |
10,000 |
|
|
Please note: The above tolerances can vary dependant on shape and material.
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gravity die casting
Cast material
- Aluminium alloys
- Zinc alloys
- Copper based alloys
Capacity
- Machine capacity – 125 – 800 tons
- Batch sizes is dependant on casting size, minimum is 3000 pieces, but typically the batch sizes are 5000 upwards
Tolerances
- Aluminium alloys 5 - 7
- Zinc alloys 4 - 6
- Copper 6 - 8
Size of casting mm |
Tolerances |
|
|
4 |
5 |
6 |
7 |
8 |
- |
10 |
0.26 |
0.36 |
0.52 |
0.74 |
1 |
10 |
16 |
0.28 |
0.38 |
0.54 |
0.78 |
1.1 |
16 |
25 |
0.3 |
0.42 |
0.58 |
0.82 |
1.2 |
25 |
40 |
0.32 |
0.46 |
0.64 |
0.9 |
1.3 |
40 |
63 |
0.36 |
0.5 |
0.7 |
1 |
1.4 |
63 |
100 |
0.4 |
0.56 |
0.78 |
1.1 |
1.6 |
100 |
160 |
0.44 |
0.62 |
0.88 |
1.2 |
1.8 |
160 |
250 |
0.5 |
0.72 |
1 |
1.4 |
2 |
Please note: The above tolerances can vary dependant on shape and material.
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finishing
Machining
photo here |
|
| Brief Overview |
Sub assembly
 |
|
| Brief Overview |
Heat treatment
photo here |
|
| Brief Overview |
Mechanical polish
 |
|
| Brief Overview |
Electro polish
 |
|
| Brief Overview |
Paint
photo here |
|
| Brief Overview |
Plate
photo here |
|
| Brief Overview |
Shot blast
 |
|
| Brief Overview |
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