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Boom & Arm
Introduce:
We can produce various kinds of standard booms, arms, and extension jibs for construction machinery. The specifications and types can meet the requirements of over 90 kinds of excavators such as KOMATSU, KOBELCO, HITACHI, KATO, SUMITOMO, CAT, HYUNDAI, DAEWOO, etc. Considerable improvement has been made with reasonable selection of materials and thickness after analysis of stress concentration part through FEM with the help of CAD system. The inside buffer plate is to support tensile load, which prolongs the service life of excavators. Ultrasound wave inspection is applied to check faulty welding points during the inspection period of assembly line. In order to further confirm the machine reliability, extensive jobsite operating trials have been conducted. We also can design various kinds of extension jibs according to customer's requirements. There are two kinds of extension jibs: two-segment type and three-segment type. Two-segment type is mainly applied in the transit of building materials like earth, sand, and concrete, the slope maintenance of expressways, and the dredging of watercourses, etc. Three-segment type is mainly applied in demolishing high-rises.
 
With the example of KOMATSU, the concrete parameters are as follows:

Parameters\Models
PC200-6
PC220-6
PC300-6
PC400-6
Normal
Arm
Extension Jib
Normal
Arm
Extension Jib
Normal
Arm
Extension Jib
Normal
Arm
Extension Jib
Total Length of Boom & Arm (mm)
9450
15400
9720
15600
1050
18000
11300
22000
Operating Weight (kg)
 
3630
 
3740
 
6070
 
8940
Bucket Capacity (m3)
0.8
0.37
1
0.45
1.4
0.5
1.8
0.6
Max. Digging Height (mm)
9305
12510
9380
12610
10210
12310
10920
14920
Max. Digging Depth (mm)
6620
11340
6920
11370
7380
12810
7760
14800
Total Height (mm)
2970
2980
3160
3255
3255
3280
3635
3660
Weight of Attachments (kg)
 
No Attachment
 
No Attachment
 
1
 
2

 
Extension Jib
1. Only applicable to "light load" operations. Common digging and any slewing operations with side load are strictly prohibited.
2. The above specifications are based on experience and changes in design can be made upon request.
3. The attachment may be disassembled due to the restriction of transportation conditions.
4. The weight of bucket, movable arm pins and movable arm cylinder pins are not included in the operating weight in the table above.
5. The operating device for PC300 and PC400 includes two types: two-segment type and three-segment type.
6. The reinforcement of slewing bracket due to the addition of counterweight should contact us.