Heavy-Duty Long Reach Boom and Arm for Hitachi Zx870 Excavator

CE-approved Hitachi ZX870 21.5 m heavy-duty long reach boom and stick, engineered for deep excavation, dredging and long-reach material handling. Custom-built to match your excavator model and working conditions.

• Proven manufacturing experience: Established in 2006, our company has over 10 years of experience designing and customizing long reach booms for all major excavator brands.
• Universal fit and OEM service: Applicable to all excavator models, with OEM customization available to match your specific machine.
• Advanced manufacturing process: Production techniques are in line with global standards for structural quality and reliability.
• Standard supply package: Includes bucket, linkage, bucket cylinder, 4 oil pipes/hoses, 6 pins and a complete lubricating system.
• Cylinder options: The stick cylinder and two boom cylinders can reuse your original machine cylinders; we can also supply a matching stick cylinder on request.
• Optional extra pipelines: Additional hydraulic pipelines can be added for attachments such as hydraulic rock breakers, hydraulic grapples and quick hitches.
• Controlled welding quality: Manual protective-gas welding using an 80% Argon / 20% CO2 mix — the industry gold standard for protective gas welding.
• High-strength materials: Main structure uses Q345B + Q690D, with Q690D for the top and bottom cover plates and Q345B elsewhere. Weldox is optional for demanding applications; pins are made of 42CrMo4.
• Heavy-duty reinforcement: Key parts can be consolidated with thicker plate or overlapping plates for heavy-duty applications.
• Precision edge preparation: Before welding, sheet edges are milled with a large edge milling machine (taper process), allowing the weld to penetrate into the steel sheet for higher structural performance.
• Post-weld precision machining: All base, joint and other main structures are adjusted on a boring machine after welding to prevent welding stress from causing large tolerances.
• Lead time and warranty: Manufacture time is approximately 15 days, with a 12-month warranty after installation.
• Service support: A complete parts list is supplied with every long reach boom for easy maintenance and after-sales service.

Specifications are for reference and can be customized to your excavator model and application requirements.