Foundry Operation

The following data show typical capability of our supplying foundries. If you have a project out of the range, we can certainly source a supplier and (or) develop a process to achieve your goal!

Table 1. Casting dimensional tolerance (Metric unit)
Casting Nominal Size (mm)
Casting Dimension Tolerance CT Grade Number & Tolerance (mm)
From
To
5
6
7
8
9
10
11
12
100
160
0.62
0.88
1.2
1.8
2.5
3.6
5
7
160
250
0.72
1
1.4
2
2.8
4
5.6
8
250
400
0.78
1.1
1.6
2.2
3.2
4.4
6.2
9
400
630
0.9
1.2
1.8
2.6
3.6
5
7
10
630
1000
1
1.4
2
2.8
4
6
8
11

Table 2. Casting dimensional tolerance (English unit)
Casting Nominal Size (inch)
Casting Dimension Tolerance CT Grade Number & Tolerance (inch)
From
To
5
6
7
8
9
10
11
12
3.9
6.3
0.024
0.035
0.047
0.071
0.098
0.142
0.197
0.276
6.3
9.8
0.028
0.039
0.055
0.079
0.11
0.157
0.22
0.315
9.8
15.7
0.031
0.043
0.063
0.087
0.126
0.173
0.244
0.354
15.7
24.8
0.035
0.047
0.071
0.102
0.142
0.197
0.276
0.394
24.8
39.4
0.039
0.055
0.079
0.11
0.157
0.236
0.315
0.433

Table 3. Steel Foundry Capability (Metric unit)
Process
Min. casting size (mm)
Max. casting size (mm)
Min. casting wall thickness (mm)
Casting size tolerance CT grade in Table 1
Casting surface roughness (Ra/mm)
Green sand hand molding process
50x25x10
5000x2500x2000
8
11~13
25~100
Green sand machine molding process
50x25x10
1000x800x500
8
8~10
12.5~50
Water glass sand process
50x25x10
5000x2500x2000
8
9~11
12.5~50
Air-set/no bake sand process
50x25x10
5000x2500x2000
8
9~11
12.5~50
Water glass Investment casting process
25x25x10
1000x800x500
2
7~9
3.2~12.5
Colloidal silica Investment casting Process
25x25x10
1000x800x500
2
6~7
3.2~12.5

Table 4. Steel Foundry Capability (English unit)
Process
Min. casting size (Inch)
Max. casting size (Inch)
Min. casting wall thickness (Inch)
Casting size tolerance CT grade in Table 2
Casting surface roughness (Ra/min)
Green sand hand molding process
2x1x0.5
200x100x80
0.3
11~13
1000~4000
Green sand machine molding process
2x1x0.5
40x32x20
0.3
8~10
500~2000
Water glass sand process
2x1x0.5
200x100x80
0.3
9~11
500~2000
Air-set/no bake sand process
2x1x0.5
200x100x80
0.3
9~11
500~2000
Water glass Investment casting process
2x1x0.5
40x32x20
0.08
7~9
125~500
Colloidal silica Investment casting Process
2x1x0.5
40x32x20
0.08
6~7
125~500

Table 5. Iron Foundry Capability (Metric unit)
Process
Min. casting size (mm)
Max. casting size (mm)
Min. casting wall thickness (mm)
Casting size tolerance CT grade in Table 1
Casting Ra surface roughness (Ra/mm)
Green sand hand molding process
50x25x10
5000x2500x2000
4
11~13
12.5~100
Green sand machine molding process
50x25x10
1000x800x500
4
8~10
6.3~50
Water glass sand process
50x25x10
5000x2500x2000
4
9~11
6.3~50
Air-set/no bake sand process
50x25x10
5000x2500x2000
4
9~11
6.3~50
Water glass Investment casting process
25x25x10
1000x800x500
1.5
7~9
3.2~12.5
Colloidal silica Investment casting Process
25x25x10
1000x800x500
1.5
6~7
3.2~12.5

Table 6. Iron Foundry Capability (English unit)

Process
Min. casting size (inch)
Max. casting size (inch)
Min. casting wall thickness (inch)
Casting size tolerance CT grade in Table 2
Casting Ra surface roughness (Ra/min)
Green sand hand molding process
2x1x0.5
200x100x80
0.15
11~13
500~4000
Green sand machine molding process
2x1x0.5
40x32x20
0.15
8~10
250~2000
Water glass sand process
2x1x0.5
200x100x80
0.15
9~11
250~2000
Air-set/no bake sand process
2x1x0.5
200x100x80
0.15
9~11
250~2000
Water glass Investment casting process
1x1x0.5
40x32x20
0.06
7~9
125~500
Colloidal silica Investment casting Process
1x1x0.5
40x32x20
0.06
6~7
125~500

Table. 7. Non-ferrous Foundry Capability (Metric unit)
Process
Min. casting size (mm)
Max. casting size (mm)
Min. casting wall thickness (mm)
Casting size tolerance CT grade in Table 1
Casting Ra surface roughness (Ra/mm)
Green sand hand molding process
50x25x10
5000x2500x2000
3
9~11
12.5~100
Green sand machine molding process
50x25x10
1000x800x500
3
7~9
6.3~50
Air-set/no bake sand process
50x25x10
5000x2500x2000
3
6~8
6.3~50
Water glass Investment casting process
50x25x10
5000x2500x2000
1.0
6~8
3.2~12.5
Colloidal silica Investment casting Process
25x25x10
1000x800x500
1.0
4~6
3.2~12.5

Table. 8. Non-ferrous Foundry Capability (English unit)
Process
Min. casting size (mm)
Max. casting size (mm)
Min. casting wall thickness (mm)
Casting size tolerance CT grade in Table 2
Casting Ra surface roughness (Ra/min)
Green sand hand molding process
2x1x0.5
200x100x80
0.12
9~11
500~4000
Green sand machine molding process
2x1x0.5
40x32x20
0.12
7~9
250~2000
Air-set/no bake sand process
2x1x0.5
200x100x80
0.12
6~8
250~2000
Water glass Investment casting process
1x1x0.5
200x100x80
0.04
6~8
125~500
Colloidal silica Investment casting Process
1x1x0.5
40x32x20
0.04
4~6
125~500

Table 9. Die casting manufacturing capability (Metric unit).

Alloy
Min. casting size (mm)
Max. casting size (mm)
Min. casting wall thickness (mm)
Casting size tolerance CT grade in Table 1
Casting Ra surface roughness (Ra/mm)
Al alloy
10X10X5
1000x1000x800
1.0
5~7
1.6~6.3
Zn alloy
10X10X5
1000x1000x800
0.8
4~6
0.8~6.3

Table 10. Die casting manufacturing capability (English unit).

Alloy
Min. casting size (in)
Max. casting size (in)
Min. casting wall thickness (in)
Casting size tolerance CT grade in Table 2
Casting Ra surface roughness (Ra/min)
Al alloy
0.5X0.5X0.2
40x40x32
0.04
5~7
63~250
Zn alloy
0.5X0.5X0.2
40x40x32
0.03
4~6
32~250

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