Technology
Products
Technical Data
1, Linear Tolerance
Dimensions |
Normal | The equivalent | Premium | The equivalent | ||
ISO8062-3 | VDG P690 | ISO8062-3 | VDG P690 | |||
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 |
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 | 1000×620×380 | < 100 |
Weight | 0.001-120 | 0.1-1.5 |
Min.Wall | 0.5 | 5-10 |
6,Surface Roughness
Rough Castings | (Weight)>5kg | 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 | 1.6-3.2 | ||||
Finished Castings | 0.8-1.6 |