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Technical Capability

Linear tolerance of steel castings (refer to the tolerance standard VDG Merkblad P690 for precision steel castings by investment casting in Germany).
basic size(mm)
Length * Width * Height(mm)
center distance(mm)
D1
D2
D3
D1
D2
>
tolerance
tolerance zone
tolerance
tolerance zone
tolerance
tolerance zone
tolerance
tolerance
0
6
±0.10
0.20
±0.08
0.16
±0.06
0.12
±0.25
±0.16
6
10
±0.12
0.24
±0.10
0.20
10
14
±0.15
0.30
±0.12
0.24
±0.09
0.18
14
18
±0.20
0.40
±0.14
0.28
18
24
±0.25
0.50
±0.17
0.34
±0.12
0.23
±0.32
±0.20
24
30
±0.30
0.60
±0.20
0.40
±0.14
0.27
30
40
±0.37
0.74
±0.25
0.50
±0.17
0.33
±0.50
±0.30
40
50
±0.44
0.88
±0.30
0.60
±0.20
0.39
50
65
±0.52
1.04
±0.38
0.76
±0.23
0.46
±0.71
±0.45
65
80
±0.60
1.20
±0.46
0.92
±0.27
0.53
80
100
±0.68
1.38
±0.53
1.06
±0.30
0.60
±0.90
±0.60
100
120
±0.76
1.52
±0.60
1.20
±0.33
0.66
120
140
±0.84
1.68
±0.65
1.30
±0.36
0.71
±1.15
±0.85
140
160
±0.92
1.84
±0.72
1.44
±0.38
0.76
160
180
±1.02
2.04
±0.80
1.60
±0.42
0.81
180
200
±1.12
2.24
±0.88
1.76
±0.43
0.86
±1.80
±1.00
200
225
±1.28
2.56
±0.95
1.90
±0.47
0.93
225
250
±1.44
2.88
±1.05
2.10
±0.51
1.02
250
280
±1.64
3.28
±1.15
2.30
±0.56
1.12
±2.20
±1.25
280
315
±1.84
3.68
±1.25
2.50
±0.63
1.26
315
355
±2.10
4.20
±1.40
2.60
±0.71
1.42
±2.60
±1.60
355
400
±2.40
4.80
±1.60
3.20
±0.80
1.60
D1:It is the general dimensional tolerance commonly used
D2:It is applicable to important dimensions with tolerance requirements
D3:It can only be achieved by taking special measures such as correction. It is limited to a few dimensions with special requirements
Angular tolerance: ±0.5° to ±1°. Straightness: 0.127mm error per 25mm.
Casting capacity range for steel castings.
1)depth of cast hole
through hole
D≤7mm: H≤2D
D>7mm: H≤3D
D>13mm: H≤4D
Dmin=2mm
blind hole
D≤7mm: L≤1D
D>7mm: L≤1.5D
D>13mm: L≤2D
Dmin=2mm
Deeper holes in precision steel castings can be cast with ceramic cores, but this will incur additional costs and is only suitable for mass production.
2) minimum wall thickness :2mm(small range 1mm
3) casting fillet

R≥0.5mm
4) surface roughness :Ra3.2,Ra6.3(Some castings Ra1.6)

R≥0.3mm
5) casting weight :0.5g-10kg
6) monthly production capacity:500000PCS.