Description
Custom Low Temperature Polyurethane Wheels for Freezer Racks – Flexible at -40 °C, Non-Marking, OEM/ODM Factory in China
Why Choose This Product
Freezer and cold-chain operations are hard on ordinary casters. Standard PU treads turn brittle below -20 °C, rubber hardens and leaves marks, and low-cost bearings seize once condensation gets inside. Our custom low temperature polyurethane wheels solve those problems with a formulation that keeps its elasticity in deep cold, a sealed bearing option that resists moisture, and a core that will not deform under long static rack loads. Fewer wheel failures mean fewer rack stoppages, less manual handling and lower maintenance cost during the busiest frozen season.
- The low temperature polyurethane tread stays flexible at -40 °C, avoiding the cracking and chunking that ordinary rubber or standard PU often shows after repeated freeze-thaw cycles.
- Non-marking, low-noise running keeps epoxy and polished concrete floors clean, which matters in food and pharmaceutical cold stores where floor condition is routinely inspected.
- Steel or stainless steel cores with precision bearings keep rolling effort low while carrying rack loads up to 400 kg per wheel.
- Diameter, hardness, mounting style and bearing class can all be customized, so one wheel family can cover an entire freezer rack fleet instead of mixing several suppliers.
- Each production batch is checked for hardness, cold bend performance and dimensional accuracy, and the reports can be shared with your quality team on request.
Specifications – Low Temperature Polyurethane Wheel for Freezer Racks
The table below lists our standard reference specifications for custom low temperature polyurethane wheels used on freezer racks. Every item can be adjusted to your drawing, and our technical team is glad to give expert advice on the right combination for your load, floor and temperature range. As a China OEM/ODM manufacturer, we support customized sizes, hardness and core materials to match your existing cold storage system.
| Parameter | Specification |
|---|---|
| Product name | Custom low temperature polyurethane wheel for freezer racks |
| Wheel diameter | 50 mm to 200 mm, made to order |
| Tread width | 20 mm to 50 mm |
| Tread material | Low temperature polyurethane, 85A to 95A Shore A |
| Core material | Zinc-plated carbon steel, 304 stainless steel optional |
| Bearing type | Precision ball bearing, sealed stainless steel option |
| Mounting style | Top plate, bolt hole, threaded stem, expanding stem or plain axle bore |
| Working temperature | -40 °C to +40 °C |
| Load capacity | 50 kg to 400 kg per wheel, depending on diameter and tread width |
| Floor behaviour | Non-marking, low noise, no staining on epoxy or concrete |
| Customization | OEM and ODM, custom colour, laser logo, private label packing |
| Minimum order | 200 pieces per size for customized runs |
| Lead time | Usually 15 to 25 days after order confirmation |
✔ Suitable for freezer racks, cold storage trolleys and refrigerated conveyor lines. ✔ Low temperature PU compound tested to -40 °C for flexibility. ✔ Bulk orders welcome – contact us for wholesale pricing and sample support.
Product Details – Construction & Application
Every wheel is produced in four controlled steps: core machining, surface preparation, polyurethane bonding and final assembly with bearing and mounting hardware. The core is turned and deburred so the PU layer bonds evenly around the whole circumference, which is what prevents the tread from separating after thousands of frost cycles. The bearing seat is machined to a tight tolerance, so the wheel spins freely without wobble, a detail that matters when a loaded rack has to be pushed by hand across a freezer aisle.
Buyers usually review four visible areas before ordering: the tread surface for hardness and colour consistency, the core edge for plating quality or stainless finish, the bearing bore for fit and sealing, and the mounting plate or stem for thread condition. If you send us photos of an existing wheel that has failed in your cold room, our engineers can identify whether the problem came from the compound, the load rating, the bearing or the floor surface, and then recommend a specification that solves it.
Material Properties – Low Temperature Polyurethane Grade
The numbers below are typical values from our standard low temperature polyurethane grade. They are provided as a reference for engineering review, not as a guarantee for every custom blend, and we are happy to test a specific formulation against your own cold-room conditions.
| Property | Test Method | Typical Value |
|---|---|---|
| Hardness | Shore A durometer | 85A to 95A |
| Low temperature flexibility | Cold bend test at -40 °C for 24 h | No cracks, no chipping |
| Abrasion resistance | DIN 53516 | 60 to 80 mm³ loss |
| Compression set | 70 °C for 22 h | 20 to 25 % |
| Rebound resilience | Vertical rebound at -20 °C | Above 40 % |
| Water and frost uptake | Immersion test, 7 days | Minimal, non-hygroscopic |
| Static load deformation | 72 h at rated load | Under 5 % |
| Chemical resistance | Defrost water, mild detergent, cleaning agents | Good |
These values reflect our standard low temperature PU grade and are provided for engineering reference. For orders with tight tolerances or unusual chemical exposure, we recommend a short evaluation sample run before mass production. Custom hardness from Shore 85A to 95A is available from our factory.
About Us – China OEM/ODM Factory for Low Temperature Polyurethane Wheels
About Us
Customers Visiting
As a China-based manufacturer and OEM/ODM supplier of custom polyurethane and rubber wheels, rollers and casters, we have supplied freezer rack builders, refrigerated container producers and material handling integrators for more than ten years, serving clients in over 50 countries. A large share of our output is made to customer drawings rather than sold from a fixed catalogue, which makes it practical to run genuine custom projects — including OEM and ODM programs with your own branding. Because we handle compounding, moulding, machining and assembly in one factory, we control the material from the raw resin batch to the finished wheel, and this also keeps our wholesale price competitive for buyers who order by container or by regular monthly schedule.
Factory & Equipment
Our workshop is equipped for the full production chain of polyurethane wheels: mixing and degassing equipment for the PU compound, heated moulds and curing ovens, CNC lathes for core machining, pressing and bonding stations, dynamic balance checking, salt spray testing for plated parts, and a low temperature chamber used to verify cold flexibility before a batch is released. Customers visiting our factory usually spend time in three areas: the compounding room, where the low temperature formulation is prepared; the machining line, where cores and bearing seats are finished; and the inspection bench, where hardness, dimensions and cold bend samples are checked. Visitors are welcome by appointment, and we are also glad to arrange video walkthroughs and live production checks for buyers who cannot travel.
Our Certifications – ISO9001, RoHS, Testing Reports
Our quality system is organised around ISO 9001 practice, and our materials are supplied to meet RoHS and REACH requirements where the destination market asks for it. Third-party inspection by SGS, BV or another nominated agency can be arranged before shipment, and batch records covering hardness, dimensions and cold bend results are available for orders that require traceability. Please tell us which certificates your market needs, and we will confirm what can be provided with the shipment.
Production & Inventory Policy
Lead time: Actual lead time is affected by raw material supply, machine scheduling and peak season workload, so it moves within a reasonable range. We provide the most accurate delivery estimate we can once the order is confirmed and keep you updated throughout production.
Stock status: In principle we produce to order rather than hold stock, although a limited number of fast-moving standard sizes are kept in the warehouse and their quantity changes with sales and production. Please contact us before ordering to confirm real-time availability.
Bulk and 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 timeline and will say clearly what is realistic rather than promise what we cannot deliver.
Frequently Asked Questions – Low Temperature Polyurethane Wheels
Can these low temperature polyurethane wheels keep rolling in a -40 °C freezer without cracking?
That is exactly what they are designed for. Our low temperature polyurethane grade is tested with a 24-hour cold bend at -40 °C and shows no cracking or chipping. Ordinary rubber and standard PU treads harden in deep cold and can break apart after repeated freeze-thaw cycles, while this custom compound stays flexible, so rolling resistance stays low and the tread holds its shape over a long service life.
How do I choose the right diameter, hardness and load rating for my freezer racks?
Send us the total rack weight, the number of wheels carrying it, the floor surface and the clearance under the rack. As a general guide, heavier static loads suit a larger diameter and a slightly harder tread, while quiet non-marking movement on epoxy floors works better with a softer compound. Our engineers reply with a specification suggestion and an honest opinion on the trade-offs, usually within one working day.
Are the wheels non-marking and quiet on cold storage floors?
Yes. The tread is formulated to leave no black marks or staining on epoxy, polished concrete and stainless steel surfaces, and the rolling noise stays low, which is appreciated in frozen food and pharmaceutical facilities where hygiene rules are strict. If your floor is unusually smooth or coated, tell us the surface type and we will adjust the hardness accordingly.
Can you customize the mounting type, colour, logo and packaging for my freezer racks?
Yes. We support OEM and ODM work covering top plate, bolt hole, threaded stem, expanding stem and plain axle bore mountings, as well as custom tread colour, laser or moulded logo and private label cartons. As a top professional custom solution provider in China, we send a drawing, a sample or even a clear photo with key dimensions so that we can confirm feasibility and tooling requirements before quoting.
What is the minimum order quantity and typical lead time?
For customized sizes we normally ask for 200 pieces per size, while standard sizes can often be supplied in smaller trial quantities. Production usually takes 15 to 25 days after order confirmation, depending on quantity and current scheduling. For a first project, many buyers start with a small trial batch and then move to regular monthly or quarterly orders.
How are the wheels packed and shipped?
Wheels are usually packed in double-wall cartons with inner separators to protect the tread and bearing, then stacked on pallets or packed into wooden cases for sea freight. Air and express shipping are available for urgent or sample orders. If you need reinforced export packing for long ocean transit, just note it in the order and we will prepare accordingly.
Can I get samples or test reports before placing a full order?
Yes. Samples are available for evaluation, and for customized items a sample charge and tooling cost may apply, which is normally credited against the bulk order. We can also share batch test data on hardness, dimensions and cold bend performance, and third-party inspection can be arranged if your purchasing process requires it.
What warranty and after-sales support do you provide on low temperature polyurethane wheels?
We stand behind the workmanship of our wheels and will replace any unit that shows a manufacturing defect within the agreed warranty period, provided the wheel was used within its rated load and temperature range. If a wheel fails in service, send us photos, the working conditions and your order number, and we will investigate the cause and propose a practical solution rather than simply quoting a replacement.
Let Us Build the Right Low Temperature Wheel for Your Freezer Racks
Looking for a reliable manufacturing partner for your cold storage equipment? Send us your drawing, a sample photo or simply your load and temperature details, and we will come back with a quotation, a custom sample plan and volume pricing. As a professional custom wheel manufacturer in China, we are glad to support your project from material selection through production, inspection and delivery.
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