18m Long Reach Excavator Boom for CAT 320

Custom-designed for the CAT 320 excavator, this 18m Long Reach Excavator Boom upgrades the original standard boom to overcome various operating limitations in modern earthwork and municipal construction projects.

Traditional standard booms are unable to meet the requirements of ultra-deep foundation excavation, long-distance site leveling, deep-water river dredging, and high-altitude slope trimming. As a result, construction teams often need to rent or purchase larger excavators, increasing equipment investment and extending project timelines.

Our independently developed 18m Long Reach Excavator Boom for CAT 320 is precisely matched with the excavator's original hydraulic parameters and overall performance. It maintains stable hydraulic output while significantly increasing maximum digging depth and horizontal working radius. This allows medium-sized CAT 320 excavators to complete long-reach operations that normally require larger machines.

By expanding the working capability of CAT 320 excavators, this long reach boom helps reduce equipment investment, improve construction flexibility, and adapt to diverse applications including deep excavation, dredging, and high-reach operations.

Material

Q355B High-Strength Low-Alloy Steel Construction

With more than 10 years of professional experience in excavator attachment manufacturing, our factory follows standardized production and quality inspection systems to ensure the reliability and service life of the 18m Long Reach Excavator Boom for CAT 320.

The entire boom body is manufactured from national standard Q355B high-strength low-alloy wear-resistant steel. Compared with ordinary carbon steel, this material provides superior tensile strength, compression resistance, and fatigue resistance, effectively preventing deformation and fracture during long-term heavy-load and high-frequency operation.

Craftsmanship

Automatic Robotic Welding Technology

The production process adopts full-automatic robotic welding technology to achieve uniform, dense, and reliable welds. This advanced welding process reduces the risk of weld cracking caused by long-term mechanical vibration and improves overall structural stability.

Reinforced Stress Structure Design

All key load-bearing areas are thickened and reinforced to enhance impact resistance and service life. The optimized structural design ensures stable performance under demanding excavation conditions.

Double-Layer Surface Protection

Through sandblasting rust removal and electrostatic plastic spraying treatment, the boom achieves excellent anti-rust, anti-corrosion, and wear-resistant performance. It is suitable for harsh outdoor environments including high temperature, humidity, sandstorms, and continuous heavy-duty construction.

Strict Quality Testing Before Delivery

Every finished 18m Long Reach Excavator Boom for CAT 320 undergoes strict load testing, hydraulic pressure testing, and fatigue durability testing before shipment to ensure stable performance, reliable operation, and long service life.

Product Specifications

Application Scenarios & Usage Guide

Wide Application Range

Featuring simple installation and strong compatibility, the 18m Long Reach Excavator Boom for CAT 320 requires no modification to the excavator's core structure and perfectly matches the original hydraulic control system. After simple commissioning, it can be quickly put into operation.

Deep Excavation & Dredging Applications

It is widely used in municipal water conservancy, river dredging, port renovation, foundation excavation, road slope maintenance, and wasteland reconstruction projects. In deep-water operations, it enables long-distance excavation without equipment entering water, improving safety and efficiency.

Complex Working Conditions

The extended working radius allows CAT 320 excavators to complete ultra-deep excavation, slope trimming, trench deepening, and other tasks in narrow or restricted areas where large equipment cannot access.

Real Customer Cases

Successful Application in Thailand River Regulation Project

Our 18m Long Reach Excavator Boom for CAT 320 has been widely exported to more than 20 countries and regions in Southeast Asia, Africa and the Middle East, serving hundreds of municipal, water conservancy and infrastructure projects with proven practical application experience. In 2025, we completed a batch customization of 5 sets of this 18m long reach boom for a river regulation project in Bangkok, Thailand. The project was mainly responsible for urban inland river deep-water dredging, channel widening and slope consolidation. 

The original standard booms had insufficient operating distance, failing to cover the central deep-water area and resulting in low construction efficiency. After installing our customized long reach booms, the daily dredging capacity of each CAT 320 excavator increased by 40%, completely eliminating operating blind areas and accelerating the project progress 15 days in advance. In addition, domestic infrastructure and port projects maintain long-term bulk procurement, and we support standard spot supply and non-standard size customization to meet personalized working condition demands.

Purchase & Service Guarantee

Professional Manufacturing Capability

With 10+ years of professional experience in excavator extended attachments R&D and production, our factory owns complete production lines, advanced processing equipment and strict quality inspection systems. All products have passed professional construction machinery quality certification with stable and reliable quality.

Customization & Fast Delivery Support

We support standard spot fast delivery, non-standard size customization and bulk OEM orders, and can optimize product parameters according to actual construction working conditions.

Complete Technical & Export Service

We provide one-on-one technical docking, free installation guidance and professional after-sales troubleshooting services all the time, and support complete customs clearance documents and logistics matching for overseas orders. Global customers are welcome to consult online, request free product samples and visit our factory. Leave a message now to get an accurate exclusive quote and enjoy one-stop professional purchasing service for high-quality excavator long reach booms.

FAQ

Q1: Is this 18m long reach boom fully compatible with CAT 320 excavator? Does it require any modification?

A: This 18m Long Reach Excavator Boom is exclusively customized for the CAT 320 excavator, strictly complying with original factory installation dimensions, hinge points and hydraulic parameters with 100% compatibility. No modification to the excavator body, hydraulic pipelines, main control system and other core parts is required during installation. It can be put into use after conventional disassembly, assembly and commissioning without damaging the equipment, featuring far better compatibility than universal extended booms.

Q2: Will there be issues like weak digging force or hydraulic pressure loss after installing the extended boom?

A: There will be no such problems. We optimize the mechanical structure and oil circuit adaptation design of the boom, matching the original hydraulic output parameters of CAT 320, eliminating common issues such as power loss, pressure relief, stuttering and operation shaking. Meanwhile, every boom undergoes full-load hydraulic tests and pressure durability tests before delivery to ensure stable power, flexible control and unaffected construction accuracy during long-distance and ultra-deep operation.

Q3: Is size customization supported? What is the delivery cycle?

A: Customization services are supported, including adjustable boom length, load-bearing specifications and thickening processes according to actual working conditions. Standard 18m long reach booms for CAT 320 are in stock and can be delivered within 3-7 working days. The delivery cycle for non-standard customized orders is 7-15 working days, and bulk orders can be arranged for priority production with real-time production progress tracking.

Q4: What is the service life and warranty policy of the extended boom?

A: Adopting Q355B high-strength wear-resistant steel and seamless robotic welding technology with double-layer reinforcement for key parts, the boom features excellent wear resistance and deformation resistance, with a service life of more than 5 years under standard working conditions. We provide complete product warranty service. Free maintenance and accessory replacement are available for weld cracking and structural deformation caused by non-human damage and non-violent operation, together with lifelong technical support.

Q5: Is export supported? What documents can be provided?

A: Our products have been exported in batches to more than 20 countries and regions worldwide for a long time, fully complying with international engineering construction standards. We support various cooperation modes such as foreign trade orders, FOB and CIF. Complete export documents including product quality inspection reports, factory certificates, customs declaration documents and packing lists can be provided for free, with full-process logistics docking and customs clearance assistance.