Our company included 2 branch factories with related machining capability. One is silica sol (lost wax) precision casting factory and the other is resin sand casting factory. Our business range from stainless steel casting, heat-resistant steel casting, carbon steel casting, alloy steel casting, abrasion-resistant casting to iron casting
1、线性公差（mm） Linear tolerance
2、可铸出孔的极限尺寸 Limit Dimension for Cast Holes
尺寸范围 Dimensions
一般公差 Normal
特殊公差 Premium
示意图 Diagram
孔径范围（mm） Hole Dia
孔深/孔径 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
31-50
±0.40
≥Φ8
L/D≤10
51-75
±0.50
±0.35
76-100
±0.65
±0.45
L/D≤1
101-125
±0.80
±0.60
126-150
±1.00
±0.70
L/D≤2.5
151-175
±1.20
176-200
±1.50
±0.90
L/D≤3.5
201-250
±1.80
±1.10
利用水溶芯和陶瓷芯，我们可以铸出更深的孔。 Deeper holes can be casted by using soluble cores and ceramic cores.
＞250
±0.8%
±0.5%
3.角度公差 Angle Tolerance
角度形状 Angle Type
±1°
±2°
±0.5°
4.平面度、直线度、圆度公差 Tolerance for Flatness、Straightness and Roundness
5、大小和重量范围 Size and weight range
铸件尺寸（mm） Cast Dimension
项目 Items
范围 Size
最优 Premium
0-25
0.2
0.1
轮廓尺寸（mm） Outline Dimension
800X600X400
＜200
26-50
0.3
重量（KG） Weight
0.001-50
0.1-2.0
51-100
0.5
最小壁厚（mm） Min. Wall thickness
5-10
101-150
0.8
0.4
6、表面粗糙度（Ra/μm） Surface Roughness
铸造状态 Rough Castings
重量（Weight）＞5KG 主要壁厚＞12mm Main Wall Thickness
6.3
我公司有能力对铸件表面作如下精整处理：对于碳钢和低合金钢可作发黑、镀锌、镀铬、镀镍处理；对于不锈钢铸件，可作研磨、拉丝抛光、镜面抛光、电解抛光、钝化处理。 The surface finish for the casting we can provide with is 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.
重量（Weight）≤5KG 主要壁厚≤12mm Main Wall Thickness
3.2
精整状态 Finished Castings
0.8-1.6