K51 Polyurethane On Cast Iron Caster
The KoCo's K51 series polyurethane on iron wheel has a load capacity ranging from 460 to 1500kg. Some of the features that eliminate the need for frequent maintenance while still allowing very smooth rotation even under heavy loads include a machined top plate and a combination "plane bearing + thrust bearing" structure. The product is very suitable for aerospace mold handling.
- KoCo
- China
- 15~30days
- 20 million per year
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Product Description:
To ensure smooth movement and long-lasting wear, the K51 series heavy duty polyurethane on cast iron wheel has a machined top plate and raceway. A plane and thrust bearings combination in the turning part brings about even smoother operation.
Advantages:
Maintenance-Free Precision Steering System:
The K51 heavy duty metal caster's main competitive advantage is in the steering part where the combination design of "plane bearing + thrust bearing" is used. Thus it is maintenance-free, and very smooth in the long run.
High-Precision Machined Top Plate:
K51 heavy-duty polyurethane caster top plate and raceway are finely machined. This perhaps distinguishes them from most of the other casters which are produced by a normal stamping process. Besides, the ultra-thick 10mm-12mm top plate prevents the structure from deforming under high pressure thus improving wear resistance and service life.
Heavy-Duty Structure:
The overall walking structure is reinforced with 16mm-18mm high-strength kingpin and 8mm-10mm thick yoke for a heavy-duty load of 460kg to 1500kg.
Top Plate | 4”5”/6”8”/10”12”/top plate thickness:10mm/10mm/12mm;York thickness:8/8/10 |
Finish | Powder-coated, water, oil, and corrosion-resistant |
Swivel | Plane bearing and thrust bearing |
Kingpin | 16/16/18mm |
Wheel Bearing | Ball, Roller, Tapered Roller |
Axle | 12.7/18/20mm dia. bolt with locknut |
K51 Series Professional Selection Suggestions:
With such a wide parameter range from 4 inches to 12 inches in the K51 series, we provide the following suggestions:
Step 1: Match with load capacity:
Regular heavy-duty (460kg - 680kg): It is recommended to choose 4" (100mm), 5" (125mm), or 6" (150mm). These models, together with No. 01 base plate (110x140mm), are perfect for very heavy, yet compact-sized equipment.
Super heavy-duty (800kg - 1500kg): 8" (200mm), 10" (250mm), or 12" (300mm) options are mandatory. The 12-inch version can support 1.5 tons per single wheel load. It's great for mold handling and heavy machinery.
Step 2: Decide the wheel material according to the ground condition and working environment:
NG: Extremely high load capacity and minimal starting resistance. It works well for clean floors, chemical plants, or situations where long-term static support is required.
PI/PU: Provides quiet operation and floor protection. PI wheel cores are more impact resistant, suitable for industrial workshops with an uneven surface.
CI: In extreme case scenarios (such as hot temperature or a floor littered with metal debris), a CI wheel is used. It offers the highest durability, but it should be noted that the floor may be damaged.
Step 3: Check installation dimensions:
No. 01 base plate: Fits 4" to 8" sizes, a wide hole spacing range (66~84 x 110mm), offering strong compatibility.
No. 02 base plate: Made for 10" and 12" sizes, with larger dimensions of 140x180mm, the base mounting stability is guaranteed under loads over 1 ton.
Step 4: Functional customization suggestions
Long-distance pushing: When manually or mechanically pulling, to reduce swinging, RIR directional locking must be selected.
Ramp operation: SWB (dual brake) is recommended, which, at the same time, involves wheel rotation and bracket steering for the safety of the operator.
| Wheel Diameter | Wheel Width | Wheel Material | Bearing | Load Capacity | Radius of Rotation | Height | Swivel Model | Rigid Model |
100 | 50 | PI Flat PU/Cast Iron NG Glass Fiber Reinforced Nylon PU Polyu/Polypro CI Cast Iron | Double Ball Bearing Double Ball Bearing Double Ball Bearing Double Ball Bearing | 460 | 81 | 151.6 | K51PIB4050S01 K51NGB4050S01 K51PUB4050S01 K51CIB4050S01 | K51PIB4050R01 K51NGB4050R01 K51PUB4050R01 K51CIB4050R01 |
| 125 | 50 | PI Flat PU/Cast Iron NG Glass Fiber Reinforced Nylon PU Polyu/Polypro CI Cast Iron | Double Ball Bearing Double Ball Bearing Double Ball Bearing Double Ball Bearing | 560 | 98.5 | 176.8 | K51PIB5050S01 K51NGB5050S01 K51PUB5050S01 K51CUB5050S01 | K51PIB5050R01 K51NGB5050R01 K51PUB5050R01 K51CIB5050R01 |
| 150 | 50 | PI Flat PU/Cast Iron NG Glass Fiber Reinforced Nylon PU Polyu/Polypro CI Cast Iron | Double Ball Bearing Double Ball Bearing Double Ball Bearing Double Ball Bearing | 680 | 117 | 202 | K51PIB6050S01 K51NGB6050S01 K51PUB6050S01 K51CIB6050S01 | K51PIB6050R01 K51NGB6050R01 K51PUB6050R01 K51CIB6050R01 |
| 200 | 50 | PI Flat PU/Cast Iron NG Glass Fiber Reinforced Nylon PU Polyu/Polypro CI Cast Iron | Double Ball Bearing Double Ball Bearing Double Ball Bearing Double Ball Bearing | 800 | 165 | 252.4 | K51PIB8050S01 K51NGB8050S01 K51PUB8050S01 K51CIB8050S01 | K51PIB8050R01 K51NGB8050R01 K51PUB8050R01 K51CIB8050R01 |
250 | 65 | PI Flat PU/Cast Iron NG Glass Fiber Reinforced Nylon PU Polyu/Polypro CI Cast Iron | Double Ball Bearing Double Ball Bearing Double Ball Bearing Double Ball Bearing | 1250 | 193 | 302.8 | K51PIB1065S01 K51NGB1065S01 K51PUB1065S01 K51CIB1065S01 | K51PIB1065R01 K51NGB1065R01 K51PUB1065R01 K51CIB1065R01 |
| 300 | 65 | PI Flat PU/Cast Iron NG Glass Fiber Reinforced Nylon PU Polyu/Polypro CI Cast Iron | Double Ball Bearing Double Ball Bearing Double Ball Bearing Double Ball Bearing | 1500 | 226 | 350 | K51PIB1265S01 K51NGB1265S01 K51PUB1265S01 K51CIB1265S01 | K51PIB1265R01 K51NGB1265R01 K51PUB1265R01 K51CIB1265R01 |
K51 Optional brake types:
Note: For swivel models, suffixes are "+TLB": Side Brake, "+SWB": Dual Brake, and "+RIR": Directional Lock.
Application Sectors:
Heavy industrial manufacturing.
Aerospace industry.
Heavy-duty warehousing and logistics equipment.
Automotive manufacturing.
Mold & die handling systems.
Energy & infrastructure equipment.
Company Profile:
KoCo which is a manufacturer of casters has been focused on R&D for the past 25 years. Currently, it holds a 50,000 square meter production facility and a staff of more than 200 professionals.
Besides the R&D work, KoCo also invests in mold making, injection molding, and assembly. The company is capable of producing up to 20 million units per year thus can ensure a steady supply even during the peak demand period. As a specialist supplier, we are happy to support the OEM customization fully and develop specific appearances and structures from customer requests.
We accurately test the load-bearing capacity, wear resistance, and impact resistance of our products.
By using our mobile solutions, we partner with global brands and integrators to provide them with cost-effective, one-stop mobile solutions product offerings.
Warranty Policy:
KoCo provides a one-year quality assurance period starting from the date of delivery, which will be the company’s responsibility, and covers defects in materials the workmanship problems.
Should any manufacturing defect be found in a product during normal use, we shall repair or replace it free of charge. The warranty does not cover damages resulting from unauthorized modification, overloading or incorrect installation.
Our warranty commitment is solely a product component and does not cover any incidental or consequential damages.
KoCo is always willing to offer clear and effective after-sales services.
Collaborative Partners:
Many major industry players rely on KoCo casters as their preferred solution.
Automotive: BMW, Audi, BYD, Tesla, FAW, SAIC
Energy: CATL (Contemporary Amperex Technology Co., Limited)
Logistics: SF Express, JD Logistics.
Home Appliances: Haier.
Aerospace: COMAC (Commercial Aircraft Corporation of China).
KOCO Performance Testing：
KOCO has a professional R&D laboratory, and the test reports shown are just one example of our typical cases, providing you with a quality reference. We possess strong professional testing capabilities and can provide targeted performance verification and simulation experiments based on your specific load, road conditions, and industry standards.
Test video:
Test report:
What Is the Lead Time for Delivery?
The lead time depends on how many and what models you order. We arrange production very efficiently to be able to made deliveries on time. （Usually within 15-30 days）What Is Your Production Capacity?
Our maximum annual production capacity is up to 20 million casters.What International Shipping Methods Are Supported?
We can do sea freight, air freight, and land transportation to best satisfy the customer needs.How Many Years of Manufacturing Experience Do You Have?
Over 25 years.Which Industries Are KoCo Casters Suitable For?
At present, KoCo casters have become a common feature in a variety of industries and sectors including industrial, heavy-duty logistics, AGV/AMR, medical equipment, warehousing, furniture, and home appliances.What Is the Load Capacity of KoCo Casters?
KoCo casts have a full range of capacities from light to extra-heavy-duty casters with a load capacity of several tens of kilograms to a few tons. Check out the model of the specific product for more details.Does KoCo Casters Support Customization?
Definitely, if there is a need for a specific part like wheel size, material, core structure, or surface treatment, we are able to offer custom manufacturing.How to Conduct Quality Testing?
KoCo Casters are subjected to several quality and performance tests before they are shipped. The tests include: Load Test: Ensures the caster is safe to hold the rated load. Starting Force Test: The test proves if the load can be moved smoothly with minimal friction of resistance. Noise & Deflection Test: The test results focus on low noise generation, quiet operation, and minimal deviation during movement.
