Description
Custom Hollow Bore Polyurethane Wheels for Motor Mounts
Why Choose Our Hollow Bore Polyurethane Wheels
Standard polyurethane wheels usually arrive with a fixed hub and a bore size that does not match a motor shaft, which forces designers to add spacers, sleeves or custom brackets. We remove that step by producing the bore, keyway and shoulder geometry to your specification. The hollow bore design keeps wall thickness consistent around the shaft, so load is distributed evenly and the wheel resists ovalisation under continuous rotation. Compared with solid rubber wheels, our polyurethane tread offers noticeably higher abrasion resistance and better cut and tear resistance, while still absorbing vibration that would otherwise transfer to the motor bearing. Compared with a plain nylon or cast iron wheel, the polyurethane layer reduces running noise and protects floor surfaces without sacrificing load capacity.
For engineers working on automated guided vehicles, conveyor drive rollers, motorised transfer carts and packaging machinery, this means a wheel that can be fitted directly to the drive shaft, reducing assembly time and part count. Our production line combines CNC machining of the core, controlled casting of the polyurethane and finish grinding of the bore, all under one roof. Each batch is checked for bore roundness, hardness and bonding quality before packing. If you are comparing suppliers and looking for a professional custom solution with consistent quality and a competitive price, our engineering team can review your drawing and give expert advice on the most suitable hardness, core material and tolerance band for your application.
Typical applications: OEM motor assemblies, gearbox output shafts, automated guided vehicles (AGVs), motorised transfer carts, conveyor drive rollers, packaging machinery and industrial drive brackets.
Technical Specifications – Hollow Bore Polyurethane Wheels for Motor Mounts
The table below summarises the common parameter ranges we produce. Since every wheel is made to order, values outside these ranges can usually be accommodated after a short technical review. As a China OEM/ODM manufacturer, we support customized bore diameters, keyway sizes, tread hardness and core materials to match your existing motor mount.
| Parameter | Value / Option |
|---|---|
| Outer Diameter | 50 mm – 500 mm, customised to drawing |
| Bore Type | Hollow bore / through bore, with optional keyway |
| Bore Diameter | 8 mm – 120 mm, machined to tolerance |
| Wheel Width | 20 mm – 200 mm |
| Polyurethane Hardness | Shore A 60 – 95 (±3) |
| Core Material | Aluminium alloy, carbon steel, stainless steel |
| Load Capacity | Up to 2,000 kg per wheel, depending on size and hardness |
| Bore Tolerance | ±0.05 mm typical, tighter on request |
| Surface Finish | Machined, ground or grooved tread |
| Colour | Natural amber, black or custom pigment |
| Quality System | ISO 9001:2015 certified production |
| Customisation | OEM / ODM / OBM, drawing-based production |
Special requirements such as tapered bore, threaded bore, dual keyway or embedded bearing seats are possible. Please share your drawing or sample for a feasibility check and a quotation. Bulk orders are welcome, and we will confirm the most suitable specification and price suggestion for your target market.
Material Properties of Hollow Bore Polyurethane Wheels
The performance of a hollow bore wheel depends heavily on the polyurethane formulation and the way it is bonded to the core. We use ether-based and ester-based prepolymers depending on the working environment, and we select the formulation according to load, speed, chemical exposure and temperature range rather than applying one standard compound to every job.
| Property | Typical Value | Reference |
|---|---|---|
| Hardness | Shore A 60 – 95 | ASTM D2240 |
| Tensile Strength | 30 – 55 MPa | ASTM D412 |
| Tear Strength | 60 – 110 kN/m | ASTM D624 |
| Abrasion Loss | ≤ 30 mm³ | DIN 53516 |
| Rebound Resilience | 40% – 65% | ASTM D2632 |
| Compression Set | ≤ 25% | ASTM D395 |
| Operating Temperature | -30°C to +80°C | In-house test |
| Bond Strength to Core | No separation after 10,000 cycles | In-house test |
A higher Shore A value gives better load support and lower rolling resistance, which suits motorised drive wheels running at constant speed. A lower Shore A value gives more grip and vibration damping, which suits guide wheels and applications where noise or floor protection matters more than load capacity. If you are unsure which grade fits your motor mount, our engineers can advise based on the shaft speed, static load and duty cycle you describe.
Hardness Selection Guide – Matching PU Grade to Your Motor Mount
| Shore A Grade | Load Support | Rolling Resistance | Vibration Damping | Typical Application |
|---|---|---|---|---|
| 60 – 70 | Moderate | Higher | Excellent | Guide wheels, noise-sensitive lines, floor protection |
| 75 – 80 | Good | Moderate | Good | Motorised transfer carts, mixed-duty drive wheels |
| 85 – 90 | High | Low | Moderate | Conveyor drive rollers, constant-speed motor mounts |
| 95 – 98 | Very High | Very Low | Low | Heavy-load drive brackets, high-pressure OEM assemblies |
Ratings are indicative only and depend on wheel diameter, core material and duty cycle. Our factory can supply custom hardness from Shore 60A to 95A as standard, with tighter bands available on request. Please confirm your load and speed before placing a wholesale order.
Details Images – Construction & Application
About Us – China OEM/ODM Factory for Hollow Bore Polyurethane Wheels
About Us
Customers Visiting
We are a China-based manufacturer and supplier of custom polyurethane wheels, rollers and industrial casters, serving machinery builders, automation integrators and equipment distributors in more than 30 countries. Our factory has been producing polyurethane and rubber bonded components for over 15 years, with in-house CNC machining, casting, bonding and inspection. We work with both small custom projects and large wholesale orders, and we accept OEM, ODM and OBM arrangements where the drawings, packaging and branding are provided by the customer.
Our team includes engineers who understand motor mount geometry, shaft fits and tolerance stacks, so we can review your drawing and point out potential issues before production starts. We supply free technical advice and a clear price suggestion for the target market, and we keep communication simple with English-speaking sales staff and documented inspection reports for every shipment.
- 15+ YearsManufacturing experience in polyurethane wheels, rollers and industrial casters
- 30+ CountriesExport markets across Europe, North America, Southeast Asia and the Middle East
- ISO 9001:2015Certified quality management system
- OEM / ODMDrawing-based production and private labelling support
Factory & Equipment
Our production site in China covers casting, CNC turning, milling, grinding and assembly under one roof. Key equipment includes CNC lathes for bore and outer diameter machining, polyurethane casting lines with controlled curing, dynamic balancing machines, hardness testers and bore gauges. Because the hollow bore is the most critical dimension for a motor mount wheel, we inspect every bore with calibrated instruments and record the readings against the order drawing.
For customers who need third-party verification, we support pre-shipment inspection by nominated agencies. Our quality team can also provide material certificates, dimensional reports and sample wheels for fit testing before you release a volume order. If you are sourcing a long-term manufacturing partner rather than a one-off trader, this level of documentation is usually the difference between a smooth production line and months of fitment problems.
Our Certifications (ISO9001, RoHS, Testing Reports)
Every batch of hollow bore polyurethane wheels is produced under an ISO 9001:2015 certified quality management system and can be supported with RoHS and REACH documentation as well as dimensional and hardness test reports. Third-party inspection can be arranged on request for customers who need independent verification before shipment.
Production & Inventory Policy
Lead time: Actual lead time is affected by raw material supply, machining capacity and seasonal workload, and reasonable fluctuations should be expected. We provide the most accurate delivery estimate possible after order confirmation and keep you informed throughout production.
Stock status: We generally do not hold finished stock, although a limited number of fast-moving standard sizes may be available. Real stock levels change with both sales and production, so we recommend contacting our team to confirm availability before placing an order.
Bulk & urgent orders: For large volume or urgent requirements, please contact us in advance to discuss capacity and scheduling. We will do our best to align with your timeline.
Frequently Asked Questions – Hollow Bore Polyurethane Wheels
1. What makes these wheels suitable for direct mounting on a motor shaft?
The hollow bore is machined to a controlled tolerance, typically ±0.05 mm, and can include a keyway, shoulder or retaining groove matched to your shaft. This allows the custom hollow bore polyurethane wheel to be mounted directly on the motor output without an additional hub, reducing assembly steps and eliminating the runout that often appears when adapters are stacked together.
2. Can you produce a wheel to my drawing or sample?
Yes. We work from 2D drawings, 3D files or physical samples. Our engineers will review the drawing, confirm the core material, polyurethane grade, bore tolerance and keyway dimensions, and then send a quotation with the recommended specification. If a dimension is difficult or costly to achieve, we will tell you before production and suggest alternatives, so there are no surprises further down the line.
3. What is the minimum order quantity for custom hollow bore polyurethane wheels?
MOQ depends on the size and tooling involved. For most hollow bore polyurethane wheels, we can start with a small trial batch for fit testing and then move to volume production. Sample quantities are available at a reasonable cost, which is normally refundable or deductible against the first bulk order. Please inquire with your specific size and hardness for the current flexibility.
4. How do you control quality during production?
Each order is produced against an approved drawing with defined inspection points. We check core dimensions before casting, verify polyurethane hardness and bonding after curing, and measure bore roundness and outer diameter after final machining. Inspection records are kept for each batch, and third-party inspection can be arranged on request.
5. Which polyurethane hardness should I choose for my motor mount application?
For motor-driven wheels running at higher speed with a stable load, Shore A 85 to 95 is usually the better choice because it gives lower rolling resistance and better wear life. For guide wheels, floor protection or noise-sensitive equipment, Shore A 60 to 75 provides more grip and vibration damping. Share your load, speed and surface conditions and we will give a specific recommendation.
6. What is the typical lead time and how are the wheels packed?
Lead time varies with quantity and specification, and we confirm it in writing before production begins. Wheels are packed in foam-lined cartons or on pallets with protective wrapping, and we can print your brand and part number on the packaging for OEM and ODM orders. Shipping can be arranged by sea, air or express according to your schedule.
7. Do you support OEM, ODM and private labelling?
Yes. We produce to customer drawings and can apply your logo, part number and packaging design. Our team also assists with material selection and tolerance advice when a design is still at the concept stage, which is often the most cost-effective point to involve a manufacturer and a good moment to request a price suggestion for the target market.
8. How do I start an order or request a quotation for hollow bore polyurethane wheels?
Send your drawing, required quantity, bore size, hardness preference and target delivery date. Our sales and engineering team will respond with a quotation, technical suggestions and available shipping options. For urgent projects, mention your deadline in the first message so we can prioritise the review. Wholesale pricing and sample support are available for global buyers.
Looking for a Reliable Manufacturing Partner?
Get in touch for quick quotes, custom samples and volume discounts. Whether you need a single prototype wheel for a motor mount test rig or a long-term supply agreement with OEM branding, our team is here to support your project from drawing review to final delivery. Tell us your application, and we will recommend the right bore, hardness and core material for the job.
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