About Us
Factory Tour
Quality Control
Contact Us
Request A Quote
Dongguan Hyking Machinery Co., Ltd.
Home ProductsExcavator Boom Arm

Q345B Q690D Excavator Boom Arm 16700 Mm Max Cut Depth For Hitachi ZAXIS 870

China Dongguan Hyking Machinery Co., Ltd. certification
Great communication and help finding the right fitment

—— Ben from USA

Fast ship, very pleased and was correct part machine back up and running....

—— Yvone from New Zealand

Great deal, good communications and fast service!! AAA+++!!!

—— Mike from Canada

I'm Online Chat Now

Q345B Q690D Excavator Boom Arm 16700 Mm Max Cut Depth For Hitachi ZAXIS 870

small.img.alt small.img.alt small.img.alt small.img.alt

Large Image :  Q345B Q690D Excavator Boom Arm 16700 Mm Max Cut Depth For Hitachi ZAXIS 870

Product Details:
Place of Origin: China
Brand Name: HYKING
Certification: CE,ISO
Model Number: HK-LDB900
Payment & Shipping Terms:
Minimum Order Quantity: 1 Set
Price: Negotiation
Packaging Details: film packing
Delivery Time: 45 days
Payment Terms: L/C,T/T
Supply Ability: 5 sets/month
Detailed Product Description
Excavator: Hitachi Zaxis870 Boom Length: 12000 Mm
Stick Length: 10000 Mm Bucket: 1.5 Cum Rock Bucket
Max Reach: 22100 Mm Max Cut Depth: 16700 Mm
Max Cut Height: 17200 Mm Fold Height: 3900 Mm
Extra Counter Weight: 3 Ton Material: Q345B+Q690D
High Light:

excavator dipper arm


high reach arm

Q345B Q690D Excavator Boom Arm 16700 Mm Max Cut Depth For Hitachi ZAXIS 870
Specification of this Hitachi ZAXIS 870 Excavator 22m Long Reach Boom Arm:

Total length 22000 mm
Boom length 12000 mm
Stick length 10000 mm
Bucket 1.5 cum rock bucket
Max reach 22100 mm
Max cut depth 16700 mm
Max cut height 17200 mm
Folding height 3900mm
Material Q345B+Q690D
Extra counter weight 3 ton

- For this long boom,we do not supply the extra 3 ton counter weight to customer.
Customer dismantle the original counter weight,and prepare a new counter weight for the long boom.
New counter weight 3 tons heavier than the original one.
Q345B Q690D Excavator Boom Arm 16700 Mm Max Cut Depth For Hitachi ZAXIS 870 0
-This long boom arm design also different from our standard design,it's stick cylinder is been set under the boom,our standard is on the top of the boom
This design can get bigger work range(Max reach,Max cut depth,Max cut height),but the stick excavating power smaller,because cylinder act to shorter length when excavating.
If projects do not need high strength excavating,can use this design to get larger work range.
Q345B Q690D Excavator Boom Arm 16700 Mm Max Cut Depth For Hitachi ZAXIS 870 1
Original excavator standard boom usually shorter and small work range.
Long reach excavator is large work range,and very popular in lots of constructions,such as subway construction,dam construction,etc
Long reach boom also very popular and high efficient in dredging work,dredging river,dredging sea,dredging port,etc
Our service:
1. We specialized in customizing all kinds of long boom for all kinds of excavators.
We have detailed dimension of this Hitachi ZX870 excavator,so just give us the excavator model is ok.
2. Main sheet Material of this Hitachi ZX870 excavator long reach boom is Q345B + Q690D,the top and bottom cover plate of boom and stick is Q690D,and other sheet is Q345B,Pin’s material is 42CrMo4.
3. Before welding,we have use big edge milling machine mill the edge of the sheet.So the welding can go to the internal of the steel-sheet and make the structure have higher performance. 
4. Welding is protective gas welding,the protective gas is 80% Argon and 20% CO2 mixed.
5. For all long boom we produced,will supply follow parts:
Bucket:1 pcs
Linkage:1 kits
Bucket cylinder:1 pcs
Hydraulic pipe:1 kits
Lubricant pipe:1 kits
Counter weight(if need):1 pcs
Stick cylinder:Can match original stick cylinder to save cost,if you need,we also can prepare.
For bigger excavator(tonnage higher than 50ton),we advise use the original stick cylinder,original cylinder quality much more better.
6. If you need extra hydraulic pipe for breaker or other attachments,we also can prerpare for you.And the attachments pipe have stop valve in both end,it's easy for replace attachments.
Specification of our standard long reach excavator boom arm:


Total Length

Self weight

Max reach

Max cut depth (mm)

Max cut

Folding height(mm)

Bucket Vol.


LR120 13000 2800 12500 9000 11300 2900 0.3 10~15
LR200-1 15500 4150 15400 11340 12510 2980 0.6 16~22
LR200-2 18000 4400 17600 12200 13500 3040 0.4 20~24
LR300 18000 5200 17600 12200 13720 3210 0.4 25~33
LR350 20000 6000 19600 14500 14920 3320 0.5 30~36
LR400 22000 6500 21600 16100 16100 3400 0.6 35~42
LR450 24000 7000 23200 18000 17300 3430 0.6 40~50

Above parameter is  our standard parameters,if you need special design,we can customize for you.


1. This kit long boom was export mid east
2. Customer use this Hitachi Zaxis 870 22m long reach boom arm for sea dam construction.
Delivery picture:
Can use 40ft container to hold the long boom arm.
Q345B Q690D Excavator Boom Arm 16700 Mm Max Cut Depth For Hitachi ZAXIS 870 2



Contact Details
Dongguan Hyking Machinery Co., Ltd.

Contact Person: Terry Wang

Tel: +8613662847893

Send your inquiry directly to us (0 / 3000)