Description
Custom Anti-Static PU Rollers for Explosive Dust Environments — China Factory OEM/ODM Supplier
Our custom anti-static PU rollers for explosive dust environments are manufactured in our China factory for conveying, guiding and tensioning duties where static discharge and fine combustible dust create a genuine operational risk. Each roller pairs a conductive polyurethane cover with a precision-machined steel, stainless steel or aluminium core, keeping surface resistivity inside a controlled static-dissipative range so charges bleed away rather than building up on the roll face. This protects operators, downstream equipment and product quality on powder handling, coating and packaging lines. As a professional OEM/ODM manufacturer and supplier, we customize hardness, diameter, face length, shaft design, bearing type and surface finish, backed by in-house machining, runout inspection and batch test reports. Typical applications include explosive dust environments such as flour, starch, sugar, toner, plastic powder and chemical powder handling, where a low-static, non-sparking roller keeps your production line running with fewer interruptions and lower maintenance cost. Trial quantities are accepted so you can verify performance first, and volume orders qualify for wholesale pricing.
Why Choose Our Anti-Static PU Rollers
- Conductive polyurethane cover. The cover is compounded with conductive fillers so surface resistivity stays within a defined static-dissipative range. Compared with standard insulating PU, this reduces charge accumulation on the roll face, which in dust-laden air lowers the risk of spark discharge and also cuts electrostatic dust attraction on the surface. Powder handling customers often see less product build-up and more stable web tracking as a result.
- Precision core and tight runout. Cores are turned, ground and balanced in-house, with runout typically held within 0.05 mm. That means less vibration and quieter running than a general-purpose roller, which extends bearing life and helps keep your product aligned at higher line speeds.
- Real customization, not catalogue picking. Hardness from Shore A 70 to 95, diameters from 20 mm to 300 mm, crowned, grooved, tapered or flanged profiles, keyed or threaded shafts and sealed maintenance-free bearings. Send a drawing or a used sample and our engineering team will advise on the most suitable grade for your environment.
- Factory-direct pricing. Because we manufacture rather than trade, you buy at a wholesale price without middle-man margin. Trial quantities are accepted so you can verify performance before committing to volume, and volume orders qualify for further discounts.
- Documentation you can file. Dimensional inspection reports, hardness readings and surface resistance measurements are recorded per batch, and material certificates are issued on request, which supports your own quality and compliance records.
Technical Specifications
The table below shows our standard build range for custom anti-static PU rollers used in explosive dust environments. Values are typical starting points — the final specification for your order is confirmed with your engineering team before production, so please treat custom sizes and grades as a technical discussion rather than a fixed catalogue item.
| Item | Typical Specification | Customization and Notes |
|---|---|---|
| Product type | Custom anti-static PU roller with conductive polyurethane cover | Flat, crowned, grooved, tapered or flanged profiles |
| Cover material | Conductive polyurethane, static dissipative grade | Colour and surface finish matched to your line |
| Surface resistivity | 10^6 to 10^9 ohm, typical range | Final value verified by test report for each order |
| Cover hardness | Shore A 70 to 95 | Softer grades for grip, harder grades for abrasion resistance |
| Core | Steel, stainless steel or aluminium | With or without keyway and locking features |
| Shaft | Cold drawn steel or stainless steel, plain, threaded or stepped | Machined to your drawing and tolerance |
| Outside diameter | 20 mm to 300 mm | Larger sizes reviewed for feasibility by our engineers |
| Face length | Up to 2000 mm | Wider rollers subject to deflection and support check |
| Runout | Within 0.05 mm, typical | Confirmed in the dimensional inspection report |
| Operating temperature | -20 °C to +80 °C, typical | Heat-resistant grades quoted on request |
| Bearing | Sealed ball bearing, maintenance-free options | Bearing brand and clearance to your preference |
| Minimum order quantity | 10 to 50 pcs, depending on size and grade | Sample and trial orders accepted |
| Lead time | 7 to 25 working days after drawing confirmation | Subject to material supply and production schedule |
| Packing | Carton with foam, wooden case, custom pallets | Export packing for sea and air freight |
| Documentation | Material certificates and inspection reports | Available on request |
Details Images, Applications and Related Roller Options
Anti-static PU rollers are used wherever powder, dust or flammable vapour is present and where a spark or a static shock could interrupt production. Common installations include powder coating lines, toner and pigment handling, flour and starch conveying, sugar and cocoa processing, plastic powder extrusion, chemical powder dosing and packaging film transport. In these environments a controlled-surface-resistivity roller helps you meet internal safety procedures while keeping the web or belt tracking straight.
We also build related products for lines that need a different surface behaviour: Custom Non Marking Silicone Coated Wheels and Smooth Conveyor Roller assemblies. The silicone-coated version leaves no black marks on light-coloured films, textiles or paper, and the smooth conveyor roller provides a low-friction, low-noise running surface for delicate webs. If you are unsure which cover suits your process, our engineers can compare conductive PU, silicone coated and standard PU options for your line speed, load and environment, then recommend a practical direction.
Material Properties
Anti-static performance depends on the whole construction, not only on the cover compound. The properties below describe how the conductive PU system behaves in service. Exact figures vary with hardness, wall thickness and core design, and are confirmed by test report for each production batch.
As a working rule, a softer conductive grade conforms better to slightly uneven webs and gives more grip, while a harder grade resists abrasion and deformation under continuous load. Because conductive fillers are compounded together with the base PU, hardness and conductivity have to be balanced as a pair rather than selected separately, which is why we ask for your load, line speed and dust classification before recommending a grade.
| Property | Unit or Test Reference | Typical Behaviour |
|---|---|---|
| Cover hardness | Shore A | 70 to 95, selected to suit load and grip requirements |
| Surface resistivity | ohm | 10^6 to 10^9, static dissipative, measured with a surface resistance meter |
| Abrasion resistance | DIN 53516 abrasion test | Low volume loss under continuous contact; conductive grades checked per batch |
| Tensile strength | MPa | High for a cast PU system, stated on the material certificate |
| Tear resistance | kN/m | Resists edge cutting on crowned and grooved profiles |
| Rebound resilience | % | Balanced to damp vibration and reduce running noise |
| Compression set | % | Low set under sustained load, keeping the cover profile stable |
| Cover-to-core bond | Bond test | Chemically bonded, checked to prevent cover slip under torque |
| Static decay path | Surface resistance measurement | Continuous discharge path from cover to shaft confirmed during inspection |
About Us – China OEM/ODM Factory
Our Factory
Customers Visiting
We are a China-based manufacturer and supplier specializing in custom polyurethane rollers, anti-static rollers, silicone coated wheels and smooth conveyor rollers. Our customers include converting equipment builders, packaging machinery makers, food and chemical powder processors, and automation integrators who need a professional partner able to work from a drawing or a worn sample.
Our factory brings polyurethane casting and coating, CNC machining, cylindrical grinding, assembly and balancing together under one roof. This lets us control the key variables ourselves instead of passing your order between subcontractors, which makes both quality and lead time more predictable. We export to markets across Europe, North America, Southeast Asia, the Middle East and South America, and we handle OEM, ODM and OBM projects alongside smaller trial quantities.
We would rather give you a realistic answer than an optimistic one. If a requested diameter, hardness or surface resistivity is difficult to achieve, we will say so and propose an alternative that still meets the purpose of your application.
Factory & Equipment
Our Factory Workshop with Professional Equipment
Our production lines include polyurethane casting and coating stations, CNC lathes, cylindrical grinding machines, dynamic balancing equipment for high-speed rollers, and a full inspection area with hardness testers, surface resistance meters, dial gauges, micrometers and a coordinate measuring machine. Roller covers are bonded in controlled conditions, then finished and measured before packing.
Each batch is checked against the drawing for diameter, face length, runout and cover hardness. Surface resistance is measured on the finished cover to confirm that the static dissipative behaviour is still within the agreed range after machining. Records are kept so that repeat orders can be compared and kept consistent over time.
Certifications and Quality Assurance
Our quality management follows ISO 9001 practices, and material certificates, dimensional inspection reports and surface resistance readings are available with your shipment. Third-party inspection by SGS, BV, TÜV or a nominated agency is welcome, and we are also glad to send pre-shipment photos and video for your records. If your project requires specific documented standards, please share them during the enquiry stage so we can confirm feasibility rather than promise something we cannot support in writing.
Production & Inventory Policy
Lead time: Actual lead time is affected by raw material supply, machining equipment availability and peak-season workload, so it can vary within a reasonable range. Once your order is confirmed, we provide a delivery estimate as accurate as we can and keep you updated throughout production.
Stock status: We generally do not hold finished stock, though a limited number of fast-moving standard sizes are kept on the shelf. Those quantities change with sales and production, so please contact us before ordering to confirm current availability.
Bulk & urgent orders: For large quantities or urgent 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 cannot be met.
Frequently Asked Questions
Q: What makes these custom anti-static PU rollers suitable for explosive dust environments?
A: The cover is a conductive polyurethane compound, so surface resistivity stays within a static-dissipative range around 10^6 to 10^9 ohm instead of insulating like standard PU. Static generated by the moving web or belt is drained through the roller rather than accumulating, and because the construction uses a steel or aluminium core with a non-sparking cover, the roller suits powder handling areas where airborne dust is a concern. The exact resistivity for your order is measured and reported.
Q: Can you customize the hardness, diameter and shaft to match our machine?
A: Yes. We build to drawing or to a used sample and can adjust cover hardness between Shore A 70 and 95, outside diameter from 20 mm to 300 mm, face length up to 2000 mm, and shaft design including stepped, threaded or keyed ends. Customization also covers crown, groove and flange profiles. If you send the working conditions, our engineering team will give advice on which grade and profile is likely to perform best.
Q: What is your MOQ and how do you price a trial order?
A: Minimum order quantity is usually 10 to 50 pieces depending on the size and grade, and trial or sample orders are accepted so you can verify performance first. Because we are the factory, pricing is wholesale and volume orders receive further discounts. Share your specification and target quantity and we will send a practical quotation, including any tooling or setup considerations.
Q: How do you control quality and can we receive inspection documents?
A: Every batch is inspected for diameter, face length, runout and cover hardness, and surface resistance is measured on the finished roller. We issue dimensional inspection reports and material certificates on request, and third-party inspection such as SGS, BV or TÜV can be arranged before shipment. Pre-shipment photos and video are also provided so you can review the goods remotely.
Q: What is the delivery time and how are the rollers packed?
A: Production typically takes 7 to 25 working days after the drawing is confirmed, depending on size, grade and current workload, with raw material supply and peak-season demand able to shift this within a reasonable range. Rollers are packed with foam in cartons, then wooden cases or custom pallets for export. Long rollers receive extra support to avoid bending or cover damage during sea and air freight.
Q: Do you support OEM, ODM and private label projects?
A: Yes. We work with OEM, ODM and OBM arrangements, including customer branding on packing and documentation where required. For ODM enquiries, describe the application and performance target and we will propose a construction; for OEM enquiries, send the drawing and inspection requirements and we will confirm tolerance capability before quoting.
Q: We also need rollers that will not mark a light-coloured web. Do you have an option?
A: Yes. Alongside anti-static PU rollers we produce Custom Non Marking Silicone Coated Wheels and Smooth Conveyor Roller assemblies. Silicone coating is a good fit for film, textile and paper lines where black rubber marks are unacceptable, while the smooth conveyor roller suits delicate webs needing low friction and low noise. If your line has both dust and marking concerns, we can discuss a combined approach.
Q: How do we place an order and what payment terms are available?
A: Send your drawing or sample details, working environment and required quantity through the contact form. We reply with a quotation, technical suggestions and an estimated delivery window, then confirm the specification before a proforma invoice is issued. Payment terms are discussed per order and project; for regular customers we are flexible, and our team will explain the options clearly at the quotation stage.
Looking for a reliable manufacturing partner for your anti-static roller project?
Send us your drawing, the working environment and your target quantity, and we will come back with a practical quotation, a professional material suggestion and a sample plan. Our team offers expert advice on material choice, and we are glad to discuss your market requirements before you commit to a volume order.
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