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Technical parameters

Home > Technology > Technical parameters

Technical Data
1, Linear Tolerance


Dimensions

 

Normal

The equivalent

Premium

The equivalent

ISO8062-3
(2007)

VDG P690
(1999)

ISO8062-3
(2007)

VDG P690
(1999)

0-10

±0.26

DCTG6

D2

±0.13

DCTG4

D3

10-16

±0.27

DCTG6

D1

±0.14

DCTG4

D2

16-25

±0.28

DCTG6

D1

±0.15

DCTG4

D2

25-40

±0.32

DCTG6

D2

±0.23

DCTG5

D2

40-63

±0.35

DCTG6

D2

±0.25

DCTG5

D2

63-100

±0.55

DCTG7

D1

±0.39

DCTG6

D2

100-160

±0.90

DCTG8

D1

±0.60

DCTG7

D2

160-250

±1.40

DCTG9

D1

±1.00

DCTG8

D2

250-400

±2.20

DCTG10

D1

±1.60

DCTG9

D2

>400

±0.8%

DCTG11

D1

±0.5%

DCTG9

D2


Note:According to the requirement of Customer,some tolerances are subject to VDG P690 D1 or ISO 8062 CT5.

2,Limit Dimension for Cast Holes and Slots

Items
Hole
Dia.

L/D

Hole depth/Pore
diameter

Φ2-Φ3

L/D≤1

Φ4-Φ7
L/D≤2.5
≥Φ8
L/D≤3.5

Φ2-Φ3
L/D≤2
Φ4-Φ7
L/D≤5
≥Φ8
L/D≤10
Deeper and more complicated holes and slots can be casted by using soluble wax cores and ceramic cores.


3, Angle Tolerance

Angle
Type

Normal
± 1°
± 2°
± 2°
Premium
± 0.5°
± 1°
± 1°
Avoid the quick changes of casting structure,use fillet radius on internal angle when possible,which is no less than R0.3.


4,Tolerance for Flatness, Straightness and Roundness

Dimension
Normal
Premium
0-25
0.2
0.1
25-50
0.4
0.2

50-100

0.6

0.3

100-150

0.8

0.4


5,Size and Weight Range

Items

Size

Premium

Outline
Dimension

1000×620×380

< 100

Weight

0.001-120

0.1-1.5

Min.Wall
Thickness

0.5

5-10


6,Surface Roughness

Rough Castings

(Weight)>5kg
>12mm
Main Wall
Thickness

3.2-6.3

The surface finish for the castings we can provide with are as following: zinc plating, chrome plating, nickel placting, bonderiting, blacking, spray-painting for the carbon steel and low alloy steel castings; Hand dull polishing, mirror polishing, elctro polishing, vibration grinding and passivation treatment for the stainless steel castings; Sand blasting, including glass bead blasting, corundum-sand blasting and quartz-sand blasting for all steel castings.

(Weight)<5kg
<12mm
Main Wall
Thickness

1.6-3.2

Finished Castings

0.8-1.6