High Quality Excavator Tunnel Reach Arm for 320 Construction Machinery Parts

ZHONGHE Heavy Industry: Precision Custom Solutions for Global Leaders
Backed by over a decade of industry leadership, we engineer bespoke attachments for excavators from Sany, XCMG and other world famous brands. We deliver complete, appliion-optimized solutions tailored to your specific operating conditions and technical requirements.

Product Description

ZHONGHE Tunnel Boom: Engineering Excellence for Confined Spaces

——Purpose-built for subway tunneling, mining drifts, and narrow-access projects where standard booms fail.

Core Advantages

180° boom-arm articulation for maximum flexibility

Compatible with large hydraulic breakers
Stick/arm cylinders positioned below for protection
Dedied bucket cylinder guard

Engineered for confined-space operations​​

Structural Features

Enhanced Lifting Capacity

• Greater lifting force vs. standard arms on same machine

• 180° maximum boom-arm opening angle

Robust Construction

Thickened upper/lower cover plates​

Arm filled with iron sand for vibration reduction

Reinforced cylinder guards(Extended Service Life)

Leak Prevention

Stop valves prevent oil leakage during tool changes

Multi-layer welded pipe connectors

Pivot End Design

Heavy-duty boom with reinforced pivot end

Single-piece construction

Thickened steel plates

Precision Manufacturing Process: Strength Built on Quality

ZHONGHE's manufacturing prowess is the foundation of our product excellence. We implement a strictly controlled, lean production process:

1. Precision Design & Material Selection:

Professional structural design and stress analysis based on appliion requirements.

Strict sourcing of top-tier global steel (e.g.,  BS700/Q690D/Q355B structural steel).

2. High-Precision Cutting & Forming:

CNC plasma/flame cutting ensures dimensional accuracy with minimal thermal distortion.

Large structural components are precision-formed using heavy-duty press brakes and plate rollers.

3. Advanced Welding Technology:

Operated by internationally certified senior welders.

Extensive use of high-strength processes like GMAW (Gas Metal Arc Welding).

Critical joints feature double-beveled groove preparation (45°) with gas-shielded welding.

Key structural areas utilize double-pass welding.

4. Precision Machining & Assembly:

Large double-sided floor boring mills ensure high concentricity (±1mm tolerance) for pivot booms, extending lifespan.

5. Triple-Check QC Protocol: Zero Tolerance for Defects:

Design Review: Rigorous approval of drawings and technical plans.

In-Process Verifiion: 100% inspection after each manufacturing stage, checking prior process outputs. Problems are halted before proceeding.

Final Inspection: Our independent QC Department performs comprehensive checks, including:

Weld quality.

Critical dimensional accuracy (CMM - Coordinate Measuring Machine, ±1mm tolerance control).

Hydraulic system pressure and seal integrity tests.

Functional tests (range of motion, limit switch protection).

Only products passing all three mandatory quality gates receive shipment authorization.

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Company Profile

FAQ

1. OEM Capability & Order Flexibility
✓ Full OEM Acceptance for all products
✓ Minimum Order Quantity: 1 unit
Note: Brand authorization documentation required for OEM projects

2. Production Capacity
• No MOQ Constraint - custom single-unit orders accepted
• Standard Lead Time: 7-15 working days
(Expedited options available for urgent requirements)

3. Payment Terms
▸ T/T (Telegraphic Transfer)

4. Why Choose ZHONGHE?
Direct Manufacturer Advantage:
① Price Leadership: Eliminate middleman margins as factory source
② Technical Ownership: In-house R&D and production control
③ Proven Preference: 78% of clients choose us over traders after comparison
④ Efficiency: Direct communiion saves 3-5 weeks in procurement cycles

Any information, pls contact Ada!

this is my contact way directly
Ada W/A: +86 15322105263
Mail: abby@excavatorboomarm.com