4″ Stainless Black Polyurethane on Polyolefin Swivel Wheel – Stainless Steel Plate K3
$54.07
Technical Specifications











Description
4″ Black/Gray Polyurethane on Polyolefin. Shown in photo with 5″ wheel. K3A Stainless Steel Plate is considered our “cheap” line of stainless steel casters. Stainless steel casters are ideal for use in a corrosive or wet settings. This is a light duty caster that has been built for hand powered use only. This plate caster is capable of up to 300lbs of weight per caster with the right wheel selected. The swivel bearing is constructed of a double ball raceway which enables the caster to swivel more easily and change directions. The rigid and swivel caster are constructed from stamped 304 stainless steel. The swivel caster contains a center pin that uses a ½” stainless steel rivet The axle diameter is a 3/8” bolt with a latching nut. You can order an stainless steel lube axle which offers a oil fitting in the bolt head to grease the wheel. This stainless steel caster also has a mirror finish available upon request. You can get a large selection of wheels. They are NSF and ROHS compliant. The mounting plate is 2 3/8” x 3 5/8” and the hole pattern is slotted to: 1 3/4” x 2 7/8” – 3” and is designed to use a mounting bolt size of 5/16”. The reason this caster is considered “economy” is lacks the metal shield covering the swivel bearing. K3A Casters also does not come with a lubricated fitting in the swivel bearing. These features are not necessarily negative depending on the application. The shield over the swivel bearing can retain water from a wash down which can produce filthy conditions, depending on the use. This caster is ideal for washdown applications such as an animal lab or butcher table. If you must have a lubrication fitting on your stainless steel caster with this plate and bolt hole pattern, please click here for our Stainless Steel Caster Model 3
The Economy Stainless Steel Caster Model K3 with Polyurethane Wheel on Polyolefin is built tough for wet, corrosive environments where hygiene and durability are non-negotiable. Crafted from stamped stainless steel, it fights rust and stands up to harsh conditions—think labs, hospitals, or food plants. Its swivel skips the dust cap, adds a drain hole to shed water, and ditches the grease fitting to slash maintenance and costs. It’s reliable mobility for those who need it without breaking the bank.
The Polyurethane Wheel on Polyolefin rolls smooth, stays quiet, and won’t mark floors—perfect for smooth surfaces up to 300 pounds per caster (150 pounds parked). With a polyurethane tread fused to a polyolefin core, plus sealed ball bearings and thread guards, it resists chemicals and corrosion while keeping performance tight. It’s not made for rough terrain or heavy shocks, but it shines where cleanliness and floor care are critical.
This caster fits right into settings like research labs, healthcare facilities, or food service—anyplace demanding sanitation and low noise. It’s a solid pick for light industrial use on smooth floors, delivering no-fuss movement with lasting quality.
Applications:
- Research laboratories
- Hospitals and healthcare facilities
- Food service and processing plants
- Schools and educational institutions
- Bakeries and commercial kitchens
- Light industrial settings with smooth floors
- Institutional environments needing quiet, clean operation
FAQ
Frequently Asked Questions about the Economy Stainless Steel Caster Model K3 with Polyurethane Wheel on Polyolefin
What is the load capacity of the Economy Stainless Steel Caster Model K3 with Polyurethane Wheel on Polyolefin?
The load capacity is up to 300 pounds per caster. For applications where the caster is parked for extended periods, do not exceed 50% of the rated capacity (150 pounds per caster) to maintain wheel integrity.
In what environments is this caster and wheel combination best suited?
This combination excels in wet or corrosive environments, such as research laboratories, hospitals, food service areas, schools, bakeries, and other institutional settings. The stainless steel construction and polyurethane wheel resist corrosion and chemical exposure.
What are the key features of the Model K3 caster?
The Model K3 caster is crafted from stamped stainless steel for durability and corrosion resistance. Its swivel design lacks a dust cap and includes a drain hole in the swivel bearing to prevent water buildup. It also omits a grease fitting, lowering initial cost and maintenance needs.
What are the advantages of the Polyurethane Wheel on Polyolefin?
The Polyurethane Wheel on Polyolefin is non-marking, rolls smoothly on even surfaces, and resists many chemicals and solvents. It features precision sealed ball bearings for effortless movement and thread guards to shield bearings from corrosion and debris.
In which industries is the Model K3 caster with Polyurethane Wheel on Polyolefin commonly used?
It’s widely used in research laboratories, hospitals, food service, schools, bakeries, and institutional settings, as well as light industrial environments with smooth floors.
What are the limitations of the Polyurethane Wheel on Polyolefin?
This wheel isn’t suited for shock loads, impacts, floor obstructions, or static loads. It performs best on smooth floors—rough or uneven surfaces can damage it. For parked applications, limit the load to 150 pounds per caster.
How should I use the Model K3 caster with Polyurethane Wheel on Polyolefin to ensure optimal performance and longevity?
Use it on smooth, clean floors, avoid overloading, and protect it from shock or impact. For prolonged parking, keep the load at or below 150 pounds per caster. Regular cleaning and wear inspections are advised.
Can the Polyurethane Wheel on Polyolefin be used on any floor surface?
No, it’s designed for smooth floors only. Rough, uneven, or cluttered surfaces can harm the wheel and shorten its lifespan.
Why is there no grease fitting on the Model K3 caster?
Skipping the grease fitting cuts costs and eliminates lubrication needs, making it more economical and practical for wet or corrosive settings where grease might not work well.
How does the swivel design of the Model K3 caster prevent water collection?
Without a dust cap over the ball bearings and with a drain hole in the swivel bearing, water flows through rather than pooling—key for preventing corrosion in wet conditions.
What is the material and construction of the Polyurethane Wheel on Polyolefin?
It’s made of injection-molded polyurethane bonded to a polyolefin core, with a Shore 95A durometer. It includes precision sealed ball bearings and comes in red, gray, black, or blue, suitable for temperatures from 32°F to 180°F.
What is the purpose of the thread guards on the Polyurethane Wheel on Polyolefin?
Thread guards serve as spanner bushings, safeguarding the sealed ball bearings from corrosion and keeping threads from jamming the axle, ensuring smooth rotation.
Our #1 goal is to help you find the best caster and wheels for your needs. If you need help finding the right casters, contact our team of professionals. You can also customize many of our casters with a variety of options such as swivel locks, wheel brakes and zerk fittings. We ship our products from assembly plants in Georgia, Pennsylvania, Virginia, Texas, Nevada and Canada. Whether you’re a one-man shop or a global giant, we can provide you with: We specialize in Business to Business, however, consumer orders are gladly accepted and we can provide you with:
- Fastest Lead Time in the Industry
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- Comparative data.
- Customized caster solutions.
- Help with caster solutions.
- Case studies by industry or application.
- Manufacturer and Distributor of over $25 million dollars in Finished Component Parts
- Majority of Orders Processed and Shipped in 2 Days or Less

