TOLERANCE

1.Investment Casting Dimension Tolerance

 

Dimension

Normal

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General Dimension
 

< 25mm
25 ~ 50mm
50 ~ 75mm
75 ~ 100mm
100 ~ 150mm
> 150mm

± 0.25
± 0.4
± 0.5
± 0.7
± 0.8%
± 1.0%

± 0.15
± 0.30
± 0.40
± 0.50
± 0.65
± 0.8%

Straightness
 

< 50mm
50 ~ 100mm
100 ~ 150mm
> 150mm

± 0.25
± 0.38
± 0.5
± 0.76

± 0.13
± 0.25
± 0.30
± 0.37

Flatness
 

< 25mm
25 ~ 50mm
50 ~ 100mm
100 ~ 150mm

± 0.2
± 0.4
± 0.64
± 0.76

± 0.1
± 0.15
± 0.25
± 0.38

Flatness
 

< 25mm
25 ~ 50mm
50 ~ 100mm
100 ~ 150mm

± 0.2
± 0.4
± 0.64
± 0.76

± 0.1
± 0.15
± 0.25
± 0.38

Concentricity
 

(Wall Thickness 6mm)
壁厚 6mm
(Wall Thickness 12mm)
壁厚12mm

± 0.2

± 0.3

± 0.1

± 0.2

Radius
 

< 50mm
> 50mm

± 0.4
± 0.8%

± 0.13
± 0.6%

Roundness
 

13 mm
25 mm
38 mm
50 mm

± 0.13
± 0.25
± 0.3
± 0.38

± 0.1
± 0.15
± 0.20
± 0.25

Roughness
 

Carbon Steel
(300 Series S. S.)
(400 Series S. S.)

90 ~ 125RMS

90 ~ 125RMS

100 ~ 125RMS

60 ~ 90RMS

60 ~ 90RMS

60 ~ 100RMS

Minimum Wall Thickness
 

Carbon Steel 
Stainless Steel 

1.5mm

1.0mm

Weight Limit
 

 

5g ~ 25kg

5g ~ 35kg

Dimension Limit
 

 

(below 300 * 300 * 300mm)
300 * 300* 300以内

(below 350 * 350 *350mm)
350 * 350* 350mm以内

 

2.Dimension of slots

img1

(mm)

W

>= 2.5

4

6

8

10

16

20

24

L,D

<=5

8

20

32

46

80

120

150

 

3.Dimension of Holes

img2

(mm)

D

Tmax

T,max

3-5

5-10

5

> 5-10

> 10-30

> 5-15

> 10-20

> 30-60

> 15-25

> 20-40

> 60-120

> 25-50

> 40-60

> 120-200

> 50-80

> 60-100

> 200-300

> 80-100

> 100

> 300-350

> 100-120

 

 

 

 

 

 

 

 

 

 

 

 

4. Angle Tolerance

Angle Type

img3

img4

img5

Normal 

 

 

± 1°

± 2°

± 2°

Premium

±0.5°

± 1°

± 1°

Avoid the quick changes of casting structure, use fillet radiuson intemal angle when possible, which is no less than R0.3mm

img6