PU OHT Wheel for Semiconductor Equipment

This ultra-precision polyurethane wheel is engineered exclusively for Overhead Hoist Transport (OHT) and automated monorail systems within semiconductor fabrication plants. Designed to meet the stringent demands of high-tech cleanrooms, it features a proprietary, high-purity polyurethane formulation that exhibits near-zero material degradation and particle shedding under continuous operation. The wheel's contact profile is micro-machined to ensure absolute concentricity, minimizing kinetic micro-vibrations during high-speed transit to prevent any structural shock to delicate silicon wafers and optical components.

Technical Parameter

Tread Material: Ultra-Pure, High-Molecular Polyurethane (NDI-based elastomer)

Core Material: Aircraft-Grade Aluminum Alloy / Non-Magnetic Stainless Steel

Cleanroom Rating: ISO Class 3 / Class 10 Compatible (Zero Dusting)

Electrical Resistance: Anti-static (ESD) or Conductive options available (10^6 - 10^9Ω)

Hardness Range: Shore 90 A – 95 A

Concentricity Tolerance: ≤0.02mm (Micron-level precision CNC machining)

Bearing Configuration: Dual Shielded Stainless Steel Precision Bearings with low-outgassing grease

Application:

Engineered precisely for automated material handling systems (AMHS) in advanced electronics manufacturing:

Overhead Hoist Transport (OHT): Principal drive and guide wheels for automated vehicles transporting Front Opening Unified Pods (FOUPs) in wafer fabs.

Overhead Shuttle (OHS) Systems: Track rollers for inter-bay and intra-bay cleanroom sorting conveyors.

Automated Vacuum Transfer Modules: Low-outgassing transport wheels operating within specialized thin-film deposition and etching equipment.

Display Panel Conveyors: Smooth-rolling support wheels used in OLED/LCD cleanroom assembly lines.

Why Choose AstraRoll's Polyurethane OHT Wheels?

Strict Zero-Particle Emission: Standard industrial wheels shed fine dust due to friction, destroying sub-micron semiconductor yields. Our specialized cleanroom PU compound possesses supreme abrasion resistance, ensuring zero carbon or micro-plastic particle emissions under constant cycling.

Advanced Vibration Dampening: Micro-vibrations can crack or dislodge silicon wafers inside a FOUP. AstraRoll wheels utilize a highly resilient elastomer structure paired with micron-precision cores to eliminate axis wobbling, absorbing 95%+ of rail-induced mechanical vibration.

Permanent Electrostatic Protection: Static buildup can attract cleanroom airborne particulates or short-circuit sensitive microelectronics. Our wheels feature stable, embedded ESD properties that continuously safely dissipate static electricity into the grounded rail network.

Zero Outgassing & Chemical Inertness: Standard wheels release chemical vapors (outgassing) that contaminate cleanroom air. AstraRoll uses certified low-outgassing resins and vacuum-grade lubricants that remain completely stable under UV exposure and chemical room washdowns.

Q1. Are you a trader or direct factory?

We are a direct manufacturing factory with over 20 years of expertise in high-end industrial rollers, casters and material handling solutions. Our facility operates with ISO-certified quality management systems, allowing us to maintain full control over production cycles and quality standards. Throughout two decades of growth, we have established deep, long-term strategic partnerships with several listed companies and global automation leaders, proving our reliability as a high-tier industrial supplier.

Q2. What are your main products?

AstraRoll specializes in the engineering and production of three core product lines: Industrial Rollers, Heavy-Duty Wheels, and Precision Casters. We do not just sell components; we provide integrated movement and transport solutions. Our products are widely utilized across high-demand sectors, including: New Energy, Lithium Battery, Mining, Heavy Industry, Medical Institutional, Agriculture and Logistics.

Q3. What about delivery time?

We deeply understand that project timelines are critical.
Standard Products: Usually dispatched within 7–15 working days if the components are in stock.
Customized/OEM Orders: Depending on the complexity and volume, the lead time typically ranges from 20–35 days. This includes time for technical drawing confirmation, specialized tooling, and rigorous pre-shipment testing.
Shipping Methods: We offer flexible global logistics solutions, including FOB and CIF terms. We ship via Sea Freight (for bulk industrial orders), Air Freight (for urgent project needs), and International Express (DHL/FedEx/TNT) for smaller components or samples.

Q4. How can I get a quote for customized products?

Since a significant portion of our business involves specialized engineering, pricing is tailored to your specific technical requirements. To provide an accurate quote, please provide the following details: Technical Drawings or Sketches, Application Environment, Quantity, Special Requests. Our engineering team typically reviews and responds to custom inquiries with a formal quotation within 24–48 hours.

Q5. What is your payment?

TT / Paypal / Western Union / LC / Credit Card etc. are all available to us.