Cleanroom-grade Overhead Hoist Transport (OHT) Wheels

High-precision polyurethane (PU) wheels are engineered as a mission-critical component for Overhead Hoist Transport (OHT) systems. Understanding that the OHT system is the central nervous system of automated wafer logistics, we have developed these mobility solutions to meet the most stringent standards in semiconductor and high-tech cleanroom environments.

Key Advantages: Polyurethane (PU) Wheels to Overhead Hoist Transport (OHT) Systems

Precision Particle Control Technology: To meet the highest demands on hygiene and cleanliness in production, this series utilizes a proprietary high-polymer composite formula. This design significantly reduces particle shedding during high-speed operation and rail friction, ensuring full compliance with the strictest industry cleanroom standards (ISO Class 1-4) to prevent costly production downtime.

Steady-State ESD Compliance: Meeting the requirement for maximum process reliability and continuous monitoring, the entire wheel system possesses controlled electrostatic dissipation capabilities, with a stable resistance range of 10^6Ω - 10^9Ω . This effectively eliminates the risk of electrostatic accumulation, protecting sensitive wafers and electronic components from electrostatic discharge damage.

Dynamic High-Load Stability: Specifically engineered for sensitive production processes, the wheel body possesses excellent creep resistance and geometric stability. It maintains a constant contact trajectory and precise rail position during high-acceleration start-stop operations, providing an abrasion-free, contactless-like performance that ensures system integrity.

Superior Chemical Resistance and Easy Maintenance: Responding to the need for low-maintenance, durable, and energy-efficient solutions, the surface of the wheels possesses outstanding inertness. It is highly resistant to corrosion from strong chemical cleaning agents and exhibits excellent anti-fouling performance, which significantly reduces maintenance frequency and operational downtime risks in critical clean environments.

Low-Outgassing Formula: To address the highest demands on cleanliness, all materials are processed via vacuum degassing. This ensures that no harmful gases are released in controlled environments, meeting the extreme purity requirements for sensitive optical assembly and microelectronic packaging.

Versatile Applications: Urethane Wheels for High-Tech Manufacturing

Semiconductor and Automotive Chip Manufacturing: This series perfectly supports OHT/OHS systems. With smart driving technology evolving, automotive chip manufacturing now demands the same cleanliness standards as top-tier Fabs. These wheels ensure material safety and purity from wafer fabrication to module packaging.

Pharmaceuticals and Life Sciences: These wheels are suitable for sterile production lines and feature chemical-resistant surfaces suitable for rigorous cleaning protocols.

New Energy and Precision Batteries: This series provides high-stability support for electrode stacking and high-end battery module logistics.

OLED/FPD Display Technology: These wheels deliver high-load, precision movement for large-scale glass substrate transport.

Precision Optical Systems: This series meets the requirements for aerospace-grade assembly and high-precision sensor handling.

Your OHT system’s reliability begins with the right contact point. We invite you to partner with Mailun to engineer high-performance solutions tailored to your specific load, cleanroom, and environmental requirements. Contact our technical service department today.