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Most of our casters are assembled and dispatched within 24-48 hours.
Technical Specifications
Wheel Diameter
5
Caster City Recommendation
Ollie Recommends!
Non-Marking
Yes
Wheel Width
1 1/4
Wheel Bearing
Precision Sealed
Stem Size
See OPTIONS ABOVE
Maximum Capacity (lbs)
250 lbs
Overall Height
6 1/8"
Swivel Radius
4
Color
Gray
K3 Stem Add Ons
GR95, SQ3/4, SQ7/8, SQ7/8-GR
Weight
2.5 lbs
- Description
- FAQ
- Reviews
- CASTER CITY GUARANTEE
- Measurement Conversion Table
- Articles and How to Guides
Description
This injection molded soft gray rubber tire has had the carbon black removed from the rubber which makes it a non-marking caster wheel, suitable for applications such as a hospital. This caster wheel is 1-¼” wide and is designed to use a ⅜” axle.This soft gray rubber caster wheel comes with a durometer of 90-95A, making it excellent for indoor usage on smooth surfaces to reduice noise and vibration. This gray soft rubber caster wheel is assembled with a sealed precision ball bearing that is further guarded by two plastic spanner bushings which also act as thread guards, rotating against the axle and further protecting the bearing from direct water or chemical exposure. If your application is moved infrequently and has a high capacity, injection molded caster wheels such as this are not the best choice.
In a hospital ward where carts need to move silently without leaving marks on the floors, Caster City’s Soft Gray Rubber Caster Wheel keeps things rolling with ease. Its gray non-marking thermoplastic rubber tread, attached to a polyolefin center, absorbs shocks to safeguard the cart and fragile medical supplies, easily handling small debris in its path. Featuring precision sealed ball bearings that need no maintenance, this wheel cuts down on noise and vibration, making it ideal for hospitals, pharmaceutical labs, and food service settings where a quiet, clean roll is a must.
The wheel holds up well against chemicals and solvents, but it’s not designed for tough abuse—think overloading, uneven floors, or sitting under weight for extended periods, which can lead to flat spots. If you’re pushing it manually, drop the load capacity by 50% to make it easier to handle, and go for the largest diameter you can for a smoother roll. Made for dry factory floors, the Soft Gray Rubber Caster Wheel protects costly surfaces and helps equipment last longer, but be mindful of heat buildup or heavy impacts that might affect the bonding over time.
Application Use
- Healthcare (Up to 350 lbs): Hospital beds, medical carts, IV poles — Non-marking, rubber wheels
- Education (Up to 300 lbs): Classroom chairs, library carts — Polypropylene, rubber wheels
- Offices (Up to 300 lbs): Office chairs, desks — Soft rubber, nylon wheels
- Retail (Up to 300 lbs): Display racks, shopping carts — Non-marking, polyurethane wheels
- Food Service (Up to 1250 lbs, NSF certified): Food carts, kitchen equipment — Stainless steel, high-temp wheels
- Industrial (Up to 350 lbs): Moving dollies, stocking carts — Hard rubber, nylon wheels
- Hospitality (Up to 300 lbs): Banquet tables, laundry carts — Chrome, rubber wheels
- Warehouses (Up to 1500 lbs): Shelving, carts — Polyurethane, steel wheels
- Manufacturing (Up to 350 lbs): Assembly lines, material handling — Phenolic, rubber wheels
FAQ
What is the Stem Caster Model K3?
The StemCaster Model K3, also known as a stud caster due to its metal stem design, is a durable institutional stem caster designed for reliability. Made with stamped steel and a bright zinc-plated finish for corrosion resistance, this light duty industrial caster supports up to 350 pounds per caster. It is NSF listed, making it ideal for institutional equipment in environments like food service and healthcare.
What is the Stem Caster Model K3 made of?
The StemCaster Model K3 features a stamped steel construction for durability, ensuring it can handle frequent use in demanding settings. Its external metal parts are bright zinc-plated to resist corrosion.
What are the mounting specifications for the Stem Caster Model K3?
Mounting plate: 2-3/8” x 3-5/8”; Slotted hole pattern: 1-3/4” x 2-7/8” to 3”; Bolt size: 5/16”.
What stem options are available?
- Square Stems: SQ3/4 (3 x 1/4 CRX DRL), SQ7/8 (3 x 1/4 CRX DRL), SQ7/8-GR (5/16 CRX DRL)
- Grip Ring Stems: GR91 (7/16, 1-3/8″ length), GR95 (7/16, 2-3/16″ length)
What are the structural features?
3/8” axle, 1/2” rivet, double ball bearings, and a metal dust cap protecting the swivel raceways.
What is the weight capacity?
350 pounds per caster, regardless of brake type.
What wheel sizes are available?
3”, 3.5”, 4”, and 5”.
What tread widths are available?
1.25” or 1.5”, depending on wheel configuration.
What types of wheels are available?
- Gray Soft Rubber
- Super Soft Gray Rubber
- High Capacity Blue Rubber
- High Capacity Rubber
- Maroon/Gray Premium Polyurethane
- Gray Polyurethane
- Ultra Premium Orange Polyurethane
- Polyolefin – Black
- Nylon (White)
- High Temp Glass Filled Nylon
What are the brake options?
- TB: Top lock metal pedal, high-temp capable
- PTB: Plastic pedal, easier to engage/disengage
- TL: Total locking brake (wheel + bracket)
What are the benefits of its design?
Double ball raceways ensure smooth swivel motion and even load distribution; dust cap increases longevity; zinc finish resists corrosion.
Is it certified?
Yes, it’s NSF listed for sanitation compliance in institutional settings.
Why is it considered a new model?
It’s an updated version of Model 3 with improved stem options and performance features, despite legacy part numbers.
How does it compare to other casters?
Offers improved strength, versatility, and safety compared to other stem swivel casters due to its structural and material design.
Key Features Summary
- Construction: Stamped steel, zinc-plated
- Capacity: 350 lbs per caster
- Stem Options: Square and grip ring
- Brake Options: TB, PTB, TL
- Wheel Sizes: 3”–5”
- Tread Widths: 1.25”–1.5”
- Mounting: 2-3/8” x 3-5/8”, slotted pattern
- Structure: 3/8” axle, 1/2” rivet, dust cap
- Certifications: NSF listed
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
- Caster performance data.
- 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
If you have any questions about your measurements, please call 800-501-3808
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