Description
Custom Grease-Fitting Polyurethane Wheels for Assembly Lines – Heavy-Duty PU Wheels with M6/M8 Grease Nipple, 80–250 mm Diameter, up to 1,200 kg Load
Why Choose Our Grease-Fitting Polyurethane Wheels
Assembly lines punish wheels in ways that general material handling does not: constant start-stop motion, tight tolerances between the fixture and the track, and a maintenance window that is often only a few minutes long. Our engineers designed this wheel range around those constraints, not around a catalogue drawing, so every feature has a direct job on the line.
The serviceable grease fitting is placed so a standard grease gun reaches it without dismantling the fixture, which turns a bearing repack into a one-minute job and extends bearing life in dusty or high-cycle environments. The rigid cast iron, steel or aluminum core keeps the wheel round under heavy static loads, while the PU tread absorbs shock and protects epoxy floor coatings — a combination that outperforms solid rubber on both load capacity and rolling resistance.
Typical applications: automotive sub-assembly lines, appliance and electronics assembly conveyors, automated guided vehicles, heavy-duty transfer carts, warehouse mobile platforms, cold-storage handling equipment and custom special-purpose machinery where wheels must be serviced in place.
- Serviceable grease fitting: the M6 or M8 nipple is positioned so a standard grease gun reaches it in place, extending bearing life in dusty or high-cycle environments.
- Polyurethane tread with steel or cast iron core: the rigid core keeps the wheel round under heavy static loads, while the PU tread absorbs shock and protects floor coatings.
- Sealed precision bearings: 6204, 6205 and 6206 options in ZZ or 2RS sealing keep fine debris out on machining, welding and packaging lines.
- Real customization: bore size, hub width, tread profile, color and even the grease fitting angle can be modified, with OEM and ODM projects supported from drawing to finished batch.
- Traceable quality: bonding strength, hardness and radial runout are recorded per batch, and we welcome third-party inspection before shipment.
Specifications – Custom Grease-Fitting Polyurethane Wheels
The table below shows our standard range for custom grease-fitting polyurethane wheels for assembly lines. Values marked as customizable can be adjusted to match your existing fixture, axle or track profile. As a China OEM/ODM manufacturer, we support customized sizes, hardness and core materials to fit your conveyor system.
| Standard Custom Grease-Fitting PU Wheel – 150 mm Diameter, Steel Core, Shore A 85° (Customizable) | |
| Product | Custom grease-fitting polyurethane wheels for assembly lines |
|---|---|
| Wheel diameter | 80 mm to 250 mm (3.15 in to 9.84 in), customizable |
| Tread material | Polyurethane, Shore A 85 to 95 |
| Core material | Cast iron, carbon steel or aluminum alloy |
| Bearing type | Sealed precision ball bearing 6204 / 6205 / 6206, plain bore or custom |
| Grease fitting | M6 or M8 threaded nipple, central or side mounted |
| Load capacity | 150 kg to 1,200 kg per wheel, depending on size and core |
| Operating temperature | -30 °C to +80 °C |
| Tread profile | Smooth, crowned or grooved |
| Color options | Natural amber, black, blue, green or custom RAL shade |
| Tolerance | Diameter ±0.3 mm, radial runout 0.2 mm or less |
| Minimum order | 10 pieces for stock sizes, 50 pieces per size for custom runs |
| Lead time | 7 to 15 days for stock sizes, 20 to 30 days for custom tooling |
| Customization | OEM and ODM, laser-marked branding, custom bore, custom packaging |
✔ Suitable for assembly lines, AGVs and heavy-load transfer carts. ✔ Custom polyurethane compound for oil, chemical and abrasion resistance. ✔ Bulk orders welcome – contact us for wholesale pricing, a price suggestion and sample support.
Details Images – Construction & Application
Material Properties – Polyurethane Compound for Assembly Line Wheels
| Property | Typical Value | What It Means on Your Line |
|---|---|---|
| Shore A hardness | 85 to 95 | A harder tread carries more load with less rolling resistance; a softer tread grips better on inclined transfers. |
| Abrasion loss | 30 mm³ or lower | Slower tread wear, so the wheel diameter stays within fixture tolerance for longer. |
| Tensile strength | 35 MPa or higher | Resists chunking and tearing where wheels cross gaps or rail joints. |
| Rebound resilience | 45% to 60% | Lower vibration and noise, which matters on high-speed packaging lines. |
| Compression set | 5% or less after 22 h at 70 °C | The wheel does not develop a permanent flat spot during static storage or overnight dwell. |
| Load capacity | Up to 1,200 kg per wheel | Handles heavy fixtures and pallet transfer carts without core deformation. |
| Temperature range | -30 °C to +80 °C | Suitable for cold storage areas as well as normal workshop conditions. |
These are the measured properties of the polyurethane compound we use as standard. They are the reason a wheel of this type can stay on an assembly line far longer than a rubber alternative of the same diameter. Custom hardness from Shore 20A to 98A is available from our factory.
Details and Applications
Grease-fitting polyurethane wheels of this type are commonly used where a wheel must be serviced in place rather than replaced. On automated guided vehicles and transfer carts, the grease nipple allows planned lubrication during a routine shift stop. On assembly and conveyor lines, the PU tread protects epoxy flooring and keeps fixture position repeatable. In machining and welding cells, the sealed bearings and abrasion-resistant tread tolerate chips, coolant mist and fine dust that would quickly destroy a standard bearing.
Typical applications include automotive sub-assembly lines, appliance and electronics assembly conveyors, heavy-duty transfer carts, warehouse mobile platforms, cold-storage handling equipment and custom-built special-purpose machinery. If your project involves an unusual axle diameter, a non-standard mounting bracket or a specific track profile, our technical team can review your drawing and confirm feasibility before tooling begins.
About Us – China OEM/ODM Factory for Grease-Fitting PU Wheels
About Us
Customers Visiting
We are a professional polyurethane wheel manufacturer based in China, supplying industrial casters and wheels to integrators, OEM equipment builders and wholesale distributors since 2010. Our core products are PU-coated wheels, rollers and custom rubber-to-metal bonded parts, and our team works daily with assembly line engineers who need a wheel that fits an existing fixture rather than the other way around. Because we manufacture in our own factory rather than sourcing through traders, we can support small trial orders, discuss customization openly, and give an honest price suggestion for your target market. Our export experience covers Europe, North America, Southeast Asia and the Middle East, and we are comfortable working from your drawing, your sample or just a description of the problem you are trying to solve.
Factory & Equipment
Our Certifications (ISO9001, RoHS, Testing Reports)
Our quality management follows ISO 9001 principles, with documented procedures for incoming material control, in-process checks and final inspection. Depending on the compound and the intended market, we can supply material datasheets and RoHS-related declarations. We prefer to state what we can verify: hardness and dimensional data from our own lab, batch records for bonding strength, and continuous running test results on selected models. If a specific certification is mandatory for your project, please raise it early so we can confirm availability rather than promise it after the order.
Production & Inventory Policy
Lead time: Actual lead time depends on raw material supply, machining capacity and peak-season workload, so it can vary within a reasonable range. We will give you the most accurate delivery estimate we can once the order is confirmed and keep you informed of any change.
Stock status: We do not hold stock as a rule, but a limited number of fast-moving standard sizes are kept on the shelf. That quantity changes daily with sales and production, so please contact us to confirm real-time availability before placing an order.
Bulk & urgent orders: For large volumes or tight schedules, please talk to us early about capacity and production slots. We will do our best to fit your timeline.
Frequently Asked Questions – Custom Grease-Fitting Polyurethane Wheels
1. Can you customize the grease fitting position and wheel size for our existing fixture?
Yes. We regularly produce custom grease-fitting polyurethane wheels for assembly lines with the nipple moved to the side, recessed, or angled so a grease gun can reach it while the wheel is still mounted. Bore diameter, hub width, tread profile and overall diameter are all open to adjustment. Send us a drawing or a photo of the mounting point and we will confirm what is practical before you commit to tooling.
2. How much does the grease fitting actually extend wheel life?
On a line running two or three shifts, bearings usually fail from lubricant loss or contamination long before the polyurethane tread wears out. A grease fitting lets you purge and replenish the bearing in place, which in our experience roughly doubles the service interval compared with a sealed-for-life unit in dusty conditions. It is a small feature with a direct effect on downtime and maintenance cost.
3. What is your minimum order quantity, and can I get a sample first?
For stock sizes the minimum is around 10 pieces, and for custom sizes it is generally 50 pieces per size because of core machining and tooling setup. Samples are available and we encourage you to test them on your own assembly line before scaling up, since the right hardness depends on your floor surface, load and travel speed.
4. How do you control quality before shipment?
Raw material is checked on arrival, then each batch is inspected for diameter, radial runout, hardness and bonding strength. Selected models are run continuously for extended periods to confirm the bearing and tread hold up. We record these results per batch and can share them, and we welcome third-party inspection or a pre-shipment visit to our factory.
5. How do I get a price, and how is pricing structured?
Send us the diameter, tread hardness, core material, bearing type, load per wheel and your estimated annual quantity. Pricing depends mainly on size, core material and order volume, and wholesale pricing applies from the medium quantities upward. We are happy to give an honest price suggestion and, if helpful, a comparison against a rubber or nylon alternative so you can judge the cost per year rather than cost per piece.
6. What are the payment terms and shipping options?
We normally work on a deposit-plus-balance arrangement, with the balance due before shipment, and we can discuss other terms for repeat customers. We ship by sea, air or express courier depending on order size and urgency, and we can quote FOB, CIF or door-to-door delivery so the landed cost is clear from the start.
7. Do you offer OEM and ODM support?
Yes. We can produce wheels under your own brand, apply laser-marked part numbers, supply customized packaging and develop new sizes or tread profiles from your specification. For ODM projects we can also advise on compound selection based on the working environment, which often solves a wear or noise problem more cheaply than changing the whole assembly.
Discuss Your Grease-Fitting Wheel Project With Us
Looking for a reliable manufacturing partner for grease-fitting polyurethane wheels or other custom polyurethane components? Our wheels are for sale with full OEM/ODM support, so get in touch for a fast quote, a sample wheel and volume pricing. Tell us your diameter, load and working environment, and our engineers will come back with a practical custom solution and expert advice from design through to delivery.
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