Description
Custom Conductive Polyurethane Wheels for Semiconductor Factories — OEM/ODM Manufacturer in China
Our custom conductive polyurethane wheels are purpose-built for semiconductor fabs, where a single static discharge or a stray particle can quietly cost an entire production lot. Each wheel is built on a machined steel, stainless steel or aluminium core and wrapped in a carbon-loaded polyurethane tread with surface resistance typically between 10⁴ and 10⁹ Ω, so the wheel bleeds static away instead of storing it. Because the tread is cast and then finish-machined to your drawing, the same design can serve wafer-handling carts, FOUP transfer trolleys, cleanroom AGVs, ESD workstations and substrate transport rails. Compared with standard rubber or nylon casters, our PU formulation runs noticeably quieter, holds up better in the high-humidity air of a fab, and releases far fewer particles and plasticiser residues, protecting your ESD flooring while cutting unplanned line stoppages and wheel replacement costs. As a top OEM/ODM manufacturer in China, we back every batch with surface resistance, hardness and dynamic balance checks, so the wheel on unit 1,000 behaves like the very first one we shipped you.
Why Choose Our Conductive Polyurethane Wheels
Static control in a semiconductor plant is never a single-component problem, and a wheel that merely looks black is not automatically a safe wheel. We are a professional conductive wheel manufacturer and supplier in China working closely with fab engineers, cart builders and cleanroom equipment integrators, so our design starts from your floor resistance target, load per caster and travel speed rather than from a catalogue number. That approach gives you a custom solution matched to your line, not a generic part guess.
- Our carbon-black-filled polyurethane compounds deliver a controlled, repeatable surface resistance range instead of a one-off coating, so conductivity does not fade after a few weeks of rolling. That keeps your ESD floor inside its specified band and helps you avoid repeat audit failures, backed by resistance readings that travel with every production batch.
- A bonded core-to-tread construction with machined concentricity reduces eccentricity, which means less vibration at speed, smoother AGV travel, better positioning accuracy and longer bearing life. Dynamic balance is verified during final inspection before shipment.
- A wide hardness window from Shore A 70 to Shore A 95 lets you trade rolling resistance against load capacity for each station, so one supplier covers both light wafer carts and heavy transfer trolleys. Hardness and rebound data are supplied per order as evidence.
- Low particle generation and low outgassing PU keeps controlled environments cleaner than conventional rubber treads, which means fewer defects traced back to cart wheels. Particle and outgassing reports are available on request.
We also offer expert advice on wheel diameter, tread profile and bearing choice for your specific market and application, and we can supply custom samples for on-site trials before you commit to volume. Our units are for sale at competitive prices with full OEM/ODM support.
Specifications
The values below describe our standard conductive polyurethane wheel programme. Every line can be adjusted for your project, and as a top OEM/ODM manufacturer in China we build both stock-style wheels and fully customized units for sale at competitive prices.
| Parameter | Standard Range | Customization Options |
|---|---|---|
| Wheel diameter | 50 mm to 300 mm | Machined to your drawing, including non-standard diameters |
| Tread width | 20 mm to 80 mm | Width, crown and edge radius made to order |
| Load capacity per wheel | Up to 500 kg, depending on size and core | Verified by calculation and load testing for your duty cycle |
| Surface resistance | 10⁴ Ω to 10⁹ Ω, dissipative and conductive grades | Target value locked to your ESD floor specification |
| Tread hardness | Shore A 70 to Shore A 95 | Selected to suit floor type, load and rolling resistance needs |
| Core material | Steel, stainless steel or aluminium | Coated, plated or machined to your tolerance |
| Bearing type | Precision ball bearing, sealed bearing or plain bore | Stainless bearings available for wet or chemical areas |
| Operating temperature | −20 °C to +80 °C | High-temperature compounds quoted on request |
| Cleanroom compatibility | Suitable for ISO Class 6 to 8 environments | Particle and outgassing data provided per batch |
| Mounting style | Fixed, swivel, brake, or bolt-hole plate | Custom brackets and axle fittings manufactured to drawing |
Suitable for wafer-handling carts, FOUP transfer trolleys, cleanroom AGVs, ESD workstations and substrate transport rails. Custom conductive polyurethane compounds are available for specific humidity and chemical exposure. Wholesale and OEM/ODM orders welcome — contact us for pricing and sample support.
Details Images – Construction & Application
What our customers usually check on the drawing before ordering: tread concentricity, bore tolerance, the position of the conductive path, and whether the bearing shield suits the wiping and cleaning routine used in the fab. We confirm each of these points with you at the quotation stage, so there is no surprise when the wheels arrive at your dock.
Material Properties
The figures below are typical values for our semiconductor-grade conductive polyurethane compounds. They are intended as a design reference, not as a guaranteed minimum for every hardness and every size; exact values are confirmed in the inspection report issued with your order.
| Property | Typical Value | Remark |
|---|---|---|
| Hardness | Shore A 70 to Shore A 95 | Higher hardness for heavy loads, softer grades for quiet running |
| Tensile strength | Around 40 MPa and above | Measured on cast PU test pieces |
| Tear strength | Around 60 kN/m | Contributes to resistance against chunking at edges |
| Abrasion loss | Typically 30 to 60 mm³ | DIN abrasion method; lower loss means longer service life |
| Rebound resilience | 40% to 55% | Balances shock absorption against rolling resistance |
| Compression set | 25% or less | Keeps the wheel round under continuous static load |
| Surface resistance | 10⁴ Ω to 10⁹ Ω | Grade selected to match your ESD floor and audit requirements |
| Hydrolysis resistance | Good in high-humidity cleanroom air | Formulated for fabs where humidity control is constant |
We are glad to review your load case, floor resistance target and travel speed, and to give a professional recommendation on the right hardness and core combination before you place an order.
About Us – China OEM/ODM Factory for Conductive PU Wheels
About Us
Customers Visiting
We are a China-based factory specializing in custom polyurethane wheels, rollers and casters for industrial and cleanroom applications, serving semiconductor equipment builders, material handling integrators and industrial distributors around the world. Our team has worked in polyurethane casting and precision machining for more than a decade, and a large part of our output is OEM and ODM work, where the wheel is designed around the customer’s cart, floor and load case rather than around a standard part number.
We understand that buying from overseas can feel risky. That is why we keep communication concrete: drawings before production, inspection reports before shipment, and a named contact who follows your order from raw material to container loading. For larger projects we support third-party inspection and pre-shipment sampling, and we are happy to involve our technical team early so that a design problem is solved on paper instead of after delivery.
As a China-based manufacturer and OEM/ODM supplier of industrial polyurethane wheels and rollers since 2010, ZHXPRECI serves clients in over 50 countries. We offer customization — from roller hardness to hub materials and mounting patterns — and our products are tested to meet ISO9001 standards, supporting reliable performance for semiconductor cleanroom transport and ESD-safe handling systems. Wholesale orders are welcome with competitive direct pricing.
Factory & Equipment
Our production line covers the complete chain rather than stopping at casting. PU casting and curing, CNC turning, core machining, bonding, surface finishing, conductivity verification and dynamic balance testing are all carried out in-house, which keeps tolerances consistent between batches and shortens the path between a drawing and a finished wheel. Presses, mixers, curing ovens, CNC lathes, milling equipment, hardness testers and surface resistance meters form the core of the workshop.
Because we control the process internally, we can quote customized and small-batch production without pushing your order into a long queue, and we can flag a manufacturing limitation honestly at the quotation stage instead of later.
Certifications and Quality Control
Our factory operates under an ISO 9001 quality management system, and our products can be supplied with RoHS and REACH documentation that is relevant for cleanroom and electronics customers. Each production run of conductive polyurethane wheels is inspected for hardness, dimensions, surface resistance and dynamic balance, and the results are recorded against your order number so that a future repeat order can be matched to the original specification.
Where a project requires certification for a specific market or a specific regulated environment, please tell us at the enquiry stage and we will confirm exactly which documents we can provide. We prefer to promise only what we can actually deliver.
Production & Inventory Policy
Lead time: Actual lead time is affected by raw material supply, machining capacity, curing schedules and peak-season workload, so it naturally varies from order to order. Once your order is confirmed we provide the most accurate delivery estimate we can and keep you informed of any change.
Stock status: We generally produce to order rather than holding finished stock, although a limited number of popular sizes and standard compounds are kept on the shelf. Those quantities move with sales and production, so please contact us before ordering to confirm real-time availability.
Bulk and urgent orders: For large volumes or tight schedules, talk to us early about capacity and production slots. We will do our best to fit your timetable and will tell you honestly if a date is not realistic.
Frequently Asked Questions – Conductive Polyurethane Wheels
Can you customize the wheel dimensions and surface resistance for our particular cleanroom line?
Yes. Customization is the core of what we do. Send us your drawing or the existing wheel dimensions together with your target surface resistance, load per wheel and travel speed, and we will propose a conductive polyurethane formulation, core material and bearing arrangement for that duty. Custom diameters, tread profiles, bores and mounting plates are all produced to order, and a sample wheel can be supplied for on-site validation before volume production.
How do conductive polyurethane wheels differ from standard PU or rubber casters in a semiconductor plant?
A standard PU or rubber caster is designed for load and wear, not for static control. Our conductive compound is loaded with carbon so that charge drains away through the wheel instead of building up on an insulated cart. Beyond conductivity, the tread is formulated to generate fewer particles and less outgassing, and the core-to-tread bond is machined concentric to reduce vibration on the cart frame. That combination matters in a fab, where static damage and particle contamination are two of the most expensive failure modes.
What is your minimum order quantity for custom conductive polyurethane wheels?
MOQ depends on the size, compound and whether a new tooling or mould is required. For most custom conductive polyurethane wheels we can start from a modest trial quantity, and for repeat configurations the MOQ is lower because the tooling already exists. Tell us your annual volume and we will quote accordingly, including a wholesale price tier for regular supply.
What is the lead time, and can you handle urgent demand?
Typical lead time runs from a few weeks for standard configurations to longer for new tooling or special compounds. Because curing and machining schedules affect the schedule, we confirm the estimate after reviewing your drawing. If your project is urgent, tell us the required date at the enquiry stage and we will check capacity and give you a straight answer about what is achievable.
How are the wheels packed for export?
Wheels are cleaned, individually protected against tread scuffing and packed in strong cartons or on pallets suited to sea or air freight. For cleanroom customers we can use low-particle packaging materials and sealed inner bags on request. Pallet labels, carton markings and shipping marks are prepared to your instruction to avoid handling confusion at the destination.
Can you provide test reports, certificates and OEM/ODM branding?
We issue an inspection report with each order covering dimensions, hardness, surface resistance and dynamic balance, and we can supply ISO 9001, RoHS and REACH documentation where relevant. For OEM and ODM projects we support your own part numbering, private label packaging and custom specification sheets, and we can keep your drawings confidential under a signed agreement.
What payment methods do you accept, and how does the ordering process work?
We normally work with a deposit and balance against documents, and other arrangements can be discussed for long-term supply relationships. The process is straightforward: send your drawing and requirements, receive our technical suggestion and quotation, confirm the sample or drawing, place the order, and we handle production, inspection and shipping with updates at each stage.
Talk to Our Engineering Team
Looking for a reliable manufacturing partner for conductive wheels in your semiconductor project? Get in touch for a quick quotation, a custom sample, and volume pricing. We are happy to give practical advice on wheel size, hardness, surface resistance and bearing choice, and to support your project from drawing to delivery.
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