K74 Forged Steel Caster
- KoCo
- China
- 15~30days
- 20 million per year
Product Description:
The K74 series stainless steel caster wheel is a kingpinless design, and the raceway is precision machined and heat-treated. Heavy duty steel wheel has outstanding impact resistance, with the product capable of continuous vibration and impact loading. It has a very flexible and smooth rotation, power traction as well as transport carts subjected to heavy loads and lateral impact are the most suitable applications.



Product Advantages:
1. The top plate thickness of 14mm is way beyond the standard market thickness. With the combination of precision forging technology, it has been confirmed that this component is able to, without any deformation, endure pressures exceeding 3 tons, which guarantees safety.
2. The traditional center bolt, which is the most vulnerable part of traditional casters, has been replaced. The load is borne very directly by the double-layer hardened ball raceway, thus the impact load resistance is increased by 400%, enabling a zero-failure operation under high-strength working conditions.
3. The raceway is precision machined and heat-treated, and the steering resistance is almost negligible even with a 3.2-ton ultimate load. This contributes to the enhancement of manual pushing efficiency or AGV motor life extension.
4. The large-diameter 20mm axle bolt, together with a self-locking nut, is supporting the extra-large wheel very stably. It has wear resistance and fatigue resistance which are excellent.
Top Plate &Yoke | Plate thickness:14mm |
Finish | Zinc plated |
Swivel | Two rows of ball bearings in hardened raceways for extra strength |
Kingpin | None |
Wheel Bearing | Ball, Roller |
Axle | 20mm dia. bolt with locknut |
K74 Series Metal Castor Wheel Professional Selection Suggestions:
Step 1: Load and Performance Consideration:
1800kg - 3000kg: It is recommended to choose PX (heavy-duty polyurethane/cast iron core). Besides being very gentle on the floor, it also has the ability to slightly absorb vibrations. This makes it very suitable for automated assembly lines like the automotive ones.
2400kg - 3270kg: First choice is NX (high-strength nylon). Starting manually is the easiest with this very low resistance product, and it has very good wear and chemical resistance.
3.2 tons Extreme Environment: FS (forged steel wheel) must be selected in this situation. Single wheel loading capacity is 3.2 tons. It is specially designed for the rough flooring which is strewn with metallic debris or for extremely high-temperature areas like steel mills, shipyards, etc.
Step 2: Check Passability and Height (Diameter)
150mm (6") - 200mm (8"): The lower installation height (216-266.5mm) lowers the center of gravity of heavy equipment significantly and hence the tipping risk is decreased.
250mm (10") - 300mm (12"): A larger diameter wheel can go over obstacles with less difficulty. If the ground is laid out with grooves or gaps, selecting a bigger diameter model will considerably lessen the bumping experienced when moving.
Step 3: Verify Mounting Dimensions
Top plate dimensions: 159 × 190 mm.
Hole spacing: Supports adjustment from 104 × 152 mm to 114 × 155 mm. Please check the existing base hole locations before placing an order. The K74 is built to ultra-heavy-duty international standard specifications.
Step 4: Control Function Configuration
Power traction application: Adding the PSL directional locking is highly recommended as it can guarantee a great improvement in the trolley control accuracy during long-distance straight-line movement.
Operation on a ramp: Front brakes UWB are necessary; this is the minimum that the 3-ton load operation safety requirements call for.

| Wheel Diameter | Wheel Width | Wheel Material | Bearing | Load Capacity | Radius of Rotation | Height | Swivel Model | Rigid Model |
150 | 76 | PX Heavy-Duty PU/Cast Iron NX High-Strength Nylon FS Forged Steel | Double Ball Bearing Double Ball Bearing Double Ball Bearing | 1800 2400 3270 | 120.7 | 216 | K74PXB6076S01 K74NXB6076S01 K74FSB6076S01 | K74PXB6076R01 K74NXB6076R01 K74FSB6076R01 |
| 200 | 76 | PX Heavy-Duty PU/Cast Iron NX High-Strength Nylon FS Forged Steel | Double Ball Bearing Double Ball Bearing Double Ball Bearing | 2300 2700 3270 | 158.5 | 266.5 | K74PXB8076S01 K74NXB8076S01 K74FSB8076S01 | K74PXB8076R01 K74NXB8076R01 K74FSB8076R01 |
| 250 | 76 | PX Heavy-Duty PU/Cast Iron NX High-Strength Nylon FS Forged Steel | Double Ball Bearing Double Ball Bearing Double Ball Bearing | 2700 3270 3270 | 197 | 317.5 | K74PXB1076S01 K74NXB1076S01 K74FSB1076S01 | K74PXB1076R01 K74NXB1076R01 K74FSB1076R01 |
| 300 | 76 | PX Heavy-Duty PU/Cast Iron NX High-Strength Nylon FS Forged Steel | Double Ball Bearing Double Ball Bearing Double Ball Bearing | 3000 3270 3270 | 244.4 | 393.7 | K74PXB1276S01 K74NXB1276S01 K74FSB1276S01 | 74PXB1276R01 K74NXB1276R01 K74FSB1276R01 |
Application Areas:
Aircraft manufacturing. Automobile manufacturing industry. Warehousing and logistics industry. Heavy equipment movement. Workstation equipment. Heavy industrial equipment
About Us:
A 25-year history is the best proof of KoCo's commitment to quality. We started our caster manufacturing journey back in 1999 as a small workshop, but through continuous capital investment, recruiting talented people, and giving up none of our faith in the products, we have become a leading industrial intelligent manufacturing company operating in a 50,000 square meter facility. Our 200+ people are our most precious asset. Together, they support a very demanding production pace of 20 million casters per year. This factory advantage inherently guarantees us to present highly competitive wholesale prices as well as stable delivery times when facing global bulk purchases.
KoCo is not only a factory with a huge production capacity, but also a manufacturer that has been market-tested for 25 years and is worthy of being trusted by global partners in the long run.

Warranty:
With the purchase of any KoCo product, customers are entitled to a one-year quality guarantee plan from the date they received the goods. If during the warranty period the product stops working due to defective materials or manufacturing errors, after an internal quality inspection, we will provide free replacement parts. Please note that this service is not extended to damages caused by excessively harsh environments, overloading the product, or unauthorised changes made to the design structure. The essence of the warranty is to rectify the original product quality defects, and for this, KoCo is not responsible for any secondary costs that may be incurred due to the replacement (such as the shipping and installation costs). In addition, we unconditionally refuse to be held liable for any incidental damages under any circumstances.
Partners:
KoCo Caster has cooperated with many industry giants.
Automotive: Tesla, BMW, Mercedes-Benz, Audi, BYD, FAW, SAIC, Ford.
Energy: CATL.
Logistics: SF Express, JD.
Home Appliances: Haier.
Aerospace: COMAC.

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.






