18 Meteres excavator long arm CAT320D SK200 DX200 ZX200 SH200 R920 SY200 liugong 920 spade boom stick for backhoe dredger
The video show of dipper arm extension
Product advantage of long excavator boom and arm:
01 Use Q355B material,
02 Adopts precision steel pipeline
03 Adopt alloy copper sleeve big arm base
04 Two layers groove welded to ensure
05 Double quality inspection before leaving
06 The tolerance of position size within 1 mm
07 Angle of boom and arm can reach 163°
The specification of excavator boom stick
| Excavator Ton | Total Length(mm) | (A)Boom(mm) | (B)Arm(mm) | Maximum Digging Radius(mm) | Maximum Digging Depth(mm) | Maximum Unloading Height(mm) | Maximum Digging Height(mm) | Bucket Volume(cbm) | Cylinder(ton) |
| 11-15T | 13000 | 7250 | 5750 | 11200 | 9000 | 7550 | 9350 | 0.15-0.3 | 12T |
| 20-25T | 15400 | 8220 | 7180 | 14500 | 11300 | 10400 | 12600 | 0.4-0.6 | 12T |
| 20-30T | 18000 | 10000 | 8000 | 17300 | 13000 | 17200 | 14000 | 0.4-0.7 | 12T |
| 35-40T | 20000 | 11000 | 9000 | 19200 | 14900 | 12900 | 15200 | 0.6-1.2 | 12T |
| 40-45T | 22000 | 12000 | 10000 | 21300 | 16000 | 14000 | 17000 | 0.5-1 | 20T |
| 40-50T | 24000 | 13000 | 11000 | 23000 | 17900 | 15200 | 18100 | 0.5-1.1 |
The factory of excavator boom and stick long introduce
The long arm of the excavator is made of Q355B steel with good strength and rigidity. The shaft sleeve of the lengthened arm is generally made of 45 # steel, with 40Cr bushing inside, together with the lubricating effect of butter, it reduces the shear force produced when the shaft and the sleeve rotate frequently, thus, the service life of shaft sleeve is increased. The excavator long arm structure is generally a box-type structure, that is, the upper and lower two cover plates, plus the left and right two sidewall are combined to form, the inside needs to be welded with buffer bars, and the buffer bars must be opened with elliptical holes, this can better release the extension arm in the welding work produced by the stress, to avoid damage to the extension arm.
FIRST--CORE CRAFT TECHNOLOGY
1. Less maintaince
Using high quality materials, such as Q355B as default, Q690D optional, Niningbo connectors, seamless precision piplines, graphite alloy copper sleeve, strong but light bucket cylinder.
2. Strong and sturdy
Built-in reinforcing ribs. Professional welding skill towards different bearing position. Groove preparation(45° edge-mining) before welding.
The pictures of excavator long arm for caterpillar
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18 Meters excavator boom arm for CAT320D Images
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