High Quality 24 to 29 Tons Long Arm Excavator Construction Machinery Parts for Sale Long Reach Excavator Boom Attachments CAT323 CAT324 CAT325 SH240 DH258 SH260

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, Caterpillar, and other world famous brands. We deliver complete, application-optimized solutions tailored to your specific operating conditions and technical requirements.

Product Description

ZHONGHE Long Reach Boom Engineering Excellence

Advanced Welding Technology
• Triple-layer welding with four passes (full penetration)

• Dual-layer welding with three passes (critical joints)

                                      High-grade Ningbo connectors(Seamless precision steel tubing)

Reinforced Structural Design
• Vertical bar plate reinforcement for ear seats

• Inclined tendon reinforcement inside box sections
• Boom middle sleeve: 45# reinforced steel with integral forming process

Premium Wear Components
• Graphite alloy copper sleeve

                                   Graphite alloy copper sleeve                                                                                     Steel sleeve

​

​

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 application requirements.

Strict sourcing of top-tier global steel (e.g., Hardox wear plate, 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 Verification: 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.

​

Company Profile

FAQ

1. Seawater Operation Compatibility

✓ Corrosion-protected booms with epoxy zinc-rich primer + polyurethane topcoat
⚠️ Wear parts alert: Bushes, buckets & cylinders require intensified maintenance

2. Quality Assurance Protocol

① Design Review: Technical drawing certification
② In-Process Verification: Each workstation inspects prior operations
③ Final Validation:
• Welding integrity (UT tested)
• Dimensional accuracy (±1mm)
• Functional assembly check
→ Triple-stage approval mandatory

3. Core Product Lines

• Boom Systems:

• Long Reach Boom

• Demolition Arm

• 2/3-Stage Telescopic Arm

• Sliding Arm

• Pile Driving Arm

• Tunnel Arm
  • Attachments:

• Buckets (Standard/Heavy-Duty/Rock)

• Grapples

• Rippers
  Annual Capacity: 600+ boom arms

4. Quotation Timeline

• 48-hour guarantee after receiving:

• Excavator model

• Specifications

• Site conditions