LIUGONG 51C0331 CLG933E Track Bottom Roller Assy*OEM quality excavator chassis component manufacturer&supplier–HELI(cqctrack)

LIUGONG 51C0331 CLG933E Heavy-Duty Track Bottom Roller Assembly: Technical Specifications & Manufacturing Profile

The LIUGONG 51C0331 CLG933E Track Bottom Roller Assembly is a premium OEM-quality excavator chassis component manufactured to exact original specifications. Produced by HELI (CQCTRACK), a professional OEM & ODM excavator undercarriage parts manufacturer and supplier based in Quanzhou, China, this heavy-duty roller ensures reliable performance for the LIUGONG CLG933E model. Key features include an induction hardened raceway, forged alloy steel construction, and a multi-labyrinth sealed bearing system designed for extended service life in abrasive environments. HELI CQCTRACK is a trusted global source for durable track rollers, bottom rollers, and complete excavator undercarriage systems.

1. Product Identification & Application

• OEM Part Number: 51C0331
• Machine Compatibility: Precision-engineered for the LIUGONG CLG933E crawler excavator. This component is a direct, dimensionally identical replacement for the original part, ensuring seamless integration and performance within the machine’s undercarriage system.
• Component Designation: Track Bottom Roller / Lower Track Roller Assembly (Assy). A fundamental chassis component responsible for supporting the machine’s operational weight, guiding the track chain along its path, and maintaining proper track shoe contact with the ground.

2. Technical Design & Heavy-Duty Features

• Primary Function: Serves as a critical load-bearing point, transferring the excavator’s weight from the mainframe through the track roller frame and onto the track chain. It minimizes rolling friction during machine travel and provides lateral guidance to the track chain.
• OEM-Quality Engineering Specifications:
  • Material Science: Utilizes high-grade, impact-resistant alloy steel (e.g., 50Mn, 40Cr) for the main body and spindle. The material is selected for an optimal balance of surface hardness and core toughness.
  • Advanced Heat Treatment:
    • The outer rolling surface (raceway) undergoes Induction Hardening to achieve a deep, uniform hardened layer (typically 55-60 HRC), providing superior resistance to abrasive wear from direct contact with the track chain links.
    • The core and flange areas retain a tougher, ductile structure to absorb shock loads and prevent catastrophic failure.
  • High-Performance Bearing & Seal System: Incorporates a labyrinth-style, multi-lip sealing system housing large-diameter, pre-lubricated tapered roller bearings. This sealed cartridge is designed to:
    • Effectively exclude abrasive contaminants (fine sand, clay, slurry).
    • Retain high-temperature, extreme-pressure (EP) lithium soap grease for the life of the roller.
    • Ensure smooth rotation under high radial loads with minimal maintenance.
  • Robust Construction: Features a one-piece forged or precision-cast body design, welded with reinforced seams to the final drive housing interface, guaranteeing structural integrity under continuous dynamic stress.

3. OEM/ODM Manufacturing Excellence by HELI (CQCTRACK)
As a certified OEM/ODM manufacturer, HELI’s production process for the 51C0331 roller adheres to stringent quality protocols:

• Precision Manufacturing: Employs CNC-controlled machining, turning, and grinding to ensure critical tolerances for the shaft diameter, bore size, and sealing surfaces are consistently met.
• Process Control: Implements Statistical Process Control (SPC) and traceability systems throughout forging, machining, heat treatment, and assembly stages. Each batch is linked to material certification and hardness test reports.
• Durability Testing: Components undergo simulated load and wear testing to validate service life expectations under extreme conditions.
• Quality Assurance: Full compliance with ISO 9001:2015 quality management systems. Final inspection includes dimensional accuracy checks, rotational resistance (torque) testing, and seal leakage verification.

4. Supplier Profile: HELI / CQCTRACK

• Company: HELI, trading globally under the CQCTRACK brand, is a leading specialist in the design, forging, and manufacturing of complete undercarriage systems for crawler machinery.
• Expertise: Core competency lies in producing OEM-quality rollers, idlers, sprockets, and track links for a wide range of excavator brands, with a dedicated focus on durability and total cost-effectiveness.
• Global Logistics Hub: Strategically located in Quanzhou, Fujian, China, a key industrial and port city, enabling efficient material sourcing, production, and global export logistics to worldwide distributors and end-users.
• Market Position: Acts as both a reliable OEM supplier for replacement parts and an ODM partner for companies requiring custom-designed undercarriage solutions, offering full engineering support from prototyping to volume production.