Precision-Engineered Bushing Chains for Machinery Applications

P-20B High-Durability Bushing Chains for Industrial Use

1. Core Definition & Product Overview

2. Key Design & Engineering Features

2.1 Precision Manufacturing Processes

• Bushing Production: Cold-drawn seamless steel tubes are precision-honed to achieve inner/outer diameter tolerance of ±0.01mm, ensuring perfect fit with pins and uniform load distribution.

• Link Plate Stamping: High-strength alloy steel plates (e.g., 8620 or 50Mn) are stamped with CNC precision dies, followed by heat treatment (quenching + tempering) to achieve a hardness of HRC 40-45, balancing strength and flexibility.

• Pin Machining: Case-hardened alloy steel pins (surface hardness HRC 58-62) are ground to a surface roughness of Ra 0.2μm, reducing friction with bushings and extending service life.

• Assembly: Automated assembly lines ensure consistent pin-bushing interference fit, eliminating axial play and minimizing transmission backlash (≤0.05mm per meter of chain).

2.2 Structural Advantages (vs. Standard Roller Chains)

3. Core Performance Parameters

4. Target Machinery Applications

4.1 Industrial Automation & Robotics

• CNC machine tool indexing tables (high-precision positional control)

• Automated assembly line transfer systems (zero-backlash positioning)

• Robotic arm joint transmission (high load + repeatable accuracy)

4.2 Heavy Machinery & Manufacturing

• Metal forming machinery (presses, shears, bending machines)

• Paper mill calendering lines (high-speed, heavy-load transmission)

• Textile machinery (weaving looms, spinning frames – low backlash required)

4.3 Material Handling & Conveying

• Precision palletizing systems (accurate load positioning)

• Heavy-duty overhead conveyors (high load + stable operation)

• Automated storage and retrieval systems (AS/RS) for warehouses

4.4 Specialized Machinery

• Printing and packaging machinery (registration control for color matching)

• Pharmaceutical production lines (precision dosing/conveying)

• Aerospace component manufacturing equipment (tight tolerance requirements)

5. Quality Assurance & Compliance

• International Standards: Manufactured to ISO 606 (Roller Chains and Bush Chains) and ANSI B29.1 (American Standard for Roller Chains) with precision Class K2/Class 2 certification.

• Testing Protocols: Every batch undergoes:

1. Dimensional inspection (CNC coordinate measuring machine – CMM)

2. Tensile strength testing (universal testing machine)

3. Wear resistance testing (accelerated life test rig)

4. Backlash measurement (laser alignment system)

• Material Traceability: All steel components are batch-tracked, with certificates of compliance (CoC) available for aerospace/medical-grade applications.

6. Installation & Maintenance Best Practices

1. Sprocket Matching: Use precision-machined sprockets (tooth profile tolerance ±0.01mm) to maximize chain life and accuracy.

2. Alignment: Ensure sprocket shafts are parallel (misalignment ≤0.5mm/m) to avoid uneven wear on bushings.

3. Lubrication: For standard grades, use high-pressure gear oil (ISO VG 68) at 6-month intervals; for sealed self-lubricating grades, no regular lubrication is needed (inspect every 2,000 hours).

4. Inspection: Check for bushing wear (replace if wear exceeds 0.1mm) and link plate fatigue (cracks) every 1,000 hours of operation.