(+86)-0546-2527737

Technology

No 373, Xinxing Road, Kenli District, Dongying city, Shandong Province, China
(+86)-0546-2527737
86-133 2505 1767
hf@hfcastings.com
Tolerance

1.Linear Tolerance(mm)

2.Limit Dimension for Cast Holes

Dimensions

Normal

Premium

Diagram

Hole Dia (mm)

L/D

0-10

±0.12

±0.10

Φ2-Φ3

L/D≤2

11-15

±0.20

±0.13

16-20

±0.25

±0.15

Φ4-Φ7

L/D≤5

21-30

±0.30

±0.20

31-50

±0.40

±0.25

≥Φ8

L/D≤10

51-75

±0.50

±0.35

76-100

±0.65

±0.45

Φ2-Φ3

L/D≤1

101-125

±0.80

±0.60

126-150

±1.00

±0.70

Φ4-Φ7

L/D≤2.5

151-175

±1.20

±0.80

176-200

±1.50

±0.90

≥Φ8

L/D≤3.5

201-250

±1.80

±1.10

Deeper holes can be casted by using soluble cores and ceramic cores.

>250

±0.8%

±0.5%

3. Angle Tolerance

Angle Type

Normal

±1º

±2º

Premium

±0.5º

±1º

4.Tolerance for Flatness, Straightness and Roundness

5.Size and weight range

Cast Dimension(mm)

Normal

Premium

Items

Size

Premium

0-25

0.2

0.1

Outline Dimension
(mm)

1000X900X600

<500

26-50

0.3

0.2

Weight(KG)

0.005-120

0.5-5.0

51-100

0.5

0.3

Min. Wall thickness(mm)

0.3

8-15

101-150

0.8

0.4

6.Surface Roughness(Ra/µm)

Rough Castings

Weight>5KG
Main Wall Thickness>12mm

6.3

The surface finish for the casting we can provide with are as
the following: Blacking, Zinc plating,Chrome plating and Nickel plating
for the carbon steel and the low alloy steel castings; Tumbling,
Dull polishing, Mirror polishing, Electrolytic polishing
and Passivation treatment for the stainless steel castings.

Weight≤5KG
Main Wall Thickness≤12mm

3.2

Finished Castings

0.8-1.6