Long Reach Boom & Long Reach Arm

River heavy industry specializes in the design, production and custom-made long-reach arms for various brands of excavators.

We focus on product quality, from stress analysis, material selection, technology process, design and manufacturing, the product’s structural strength, performance and quality are guaranteed. For the arm base better protection, an internal buffer plate and reinforced installed to withstand the tensile load, and increase the service life of the excavator’s long reach front/arm.

Also, we can design a variety of two-stage extended excavator long arms according to customer demands, which are mainly suitable for earthwork and deeper excavation operations; used in river dredging, port construction, subway construction, and building foundation excavation, with a wide range of operations and high efficiency and security.

In most cases, a long reach arm/boom is likely to be used with an amphibious excavator, which requires a farther digging distance due to the height of the amphibious undercarriage being higher than the traditional land excavator.


Clean Up Waterways or Fish Ponds


Water Resources and Hydropower Engineering


Construction Transportation 、Subway Excavation

Product Advantage

Industry-standard welding technology

Good welding technology ensures the strength of the long-reach arm to meet the set standards and increase the service lifetime.

Automatic processing equipment

The cutting is fully automatic, as well as the bushing and key processing are fully automatic, which ensures that each pin on the arm is parallel, wear-resistant and noise-free.

Professional designing team

Product upgrades are carried out to greatly reduce the risk of cracking and breaking of the upper arm, based on the original product.

Advanced computer-aided design tools

The utility of two-dimensional drawing and three-dimensional design provides accurate data analysis for secondary development and private customized products, effectively shortening the production lead time

Plasma Cutting

Robot Arm Weiding




Spray Painting

The main configuration of the excavator extension arm:

To better save the cost when users replace the extension arm, we have carefully analyzed which parts on the original car can be used back and which must be replaced. The standard configuration when replacing the standard arm with the extension arm is as follows:

  • One set of arm;

  • one bucket;

  • one bucket cylinder;

  • 4 hoses;

  • 3 butter pipes;

  • one set of connecting rod assembly;

  • one set of transport connecting rod;

  • 6 pins;

Technical Date

Models Extension boom(A) Extension arm(B) Transport height(C) Max. excavation radius(D) Max. unloading height(E) Max. excavation height(F) Max. excavation depth(G) Bucket capacity Working weight Increase in weight
12T 7100mm 5900mm 2900mm 11200mm 7350mm 9350mm 9000mm 0.3m³ 12T 3000kg
20T 8220mm 7160mm 2980mm 14500mm 10390mm 12510mm 11340mm 0.4m³ 12T 4000kg
25T 8220mm 7160mm 3050mm 14500mm 10490mm 12610mm 11370mm 0.4m³ 12T 4200kg
30T 10000mm 8000mm 3210mm 17300mm 11720mm 13920mm 13010mm 0.4m³ 12T 5200kg
35T 11000mm 9000mm 3210mm 19200mm 12920mm 15120mm 15000mm 0.5m³ 12T 6000kg
40T 12000mm 10000mm 3400mm 21100mm 14240mm 16900mm 16500mm 0.6m³ 20T 6500kg
45T 13000mm 11000mm 3400mm 22900mm 15230mm 17800mm 18000mm 0.6m³ 20T 7000kg


For more special size long reach boom,please feel free to contact us!


At RIVER HEAVY INDUSDUSTRY , we are committed to the delivery of quality amphibious excavators and excavator attachments. Please fill out the form below to get in touch with us! We’ll get back to you as soon as possible as we make fast responses to our clients across the globe our priorities.