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4″ All Polyurethane Wheel – Stainless Steel Stem K3

$66.43

PN: SS-K3AP4X
In Stock
Please select any add ons you require for your caster and if you are selecting multiple option types, add all of the quantity for the first choice and then make your selections for the second, third, fourth, etcโ€ฆ choices. (Example: 2 With Brakes and 2 Without Brakes)

Click Here To See Stem Options (Modular Stems available for variety of fastening needs)

HK1/2 | HK1/2 - Single 1/2" Bolt Hole For Your Bolt +$1.00TS61 | TS61 - Threaded Stem 3/8"-16 x 1" Long +$3.00TS22 | TS22 - Threaded Stem 1/2"-13 x 1-1/2" LongTS26N | TS26N - Threaded Stem 1/2"-13 x 2-3/4" Long +$3.00TSC1 | TSC1 - Threaded Stem 1/2"-13 x 4" Long +$25.00TSC2 | TSC2 - Threaded Stem 5/8"-11 x 4" Long +$25.00TSC3 | TSC3 - Threaded Stem 3/4"-10 x 6" Long +$25.00TSC4 | TSC4 - Threaded Stem 3/4"-10 x 4" Long +$25.00GR91 | GR91 - Grip Ring Stem 7/16" Diameter x 1-3/8" Long +$27.00GR95 | GR95 - Grip Ring Stem .846" x 2-3/16" (For 7/8" Inner Diameter "Metro" Shelving) +$27.00SQ7/8-GR | SQ7/8-GR - 7/8" Plain Square Grip Ring (To Drill Your Own Cross-Holes) +$27.00RD3/4 | RD3/4 - 3/4" Round - 3 Cross Holes +$27.00SQ3/4 | SQ3/4 - 3/4" Square - 3 Cross Holes +$27.00ER9 | ER9 - Expanding Rubber for 3/4" Inner Diameter +$25.00ER27 | ER27 - Expanding Rubber for 7/8" Inner Diameter +$25.00ER28 | ER28 - Expanding Rubber for 1" Inner Diameter +$25.00ER29 | ER29 - Expanding Rubber for 1-1/8" Inner Diameter +$25.00ER17 | ER17 - Expanding Rubber for 1-1/4" Inner Diameter +$25.00ER25 | ER25 - Expanding Rubber for 1-3/8" Inner Diameter +$25.00ER26 | ER26 - Expanding Rubber for 1-1/2" Inner Diameter +$25.00ER21 | ER21 - Expanding Rubber for 1-13/16" Inner Diameter +$25.00

Please Select a Brake Option.

No BrakeTB | TB - Metal Pedal on side of wheel +$10.00PTB | PTB - Plastic Pedal on top of wheel (Easier To Use) +$10.00TL | TL - Total Locking Brake +$30.00
Volume Pricing on Inquiry. Call us: 800-501-3808

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Technical Specifications

4
Wheel Diameter
4
Ollie Recommends!
Caster City Recommendation
Ollie Recommends!
Yes
Non-Marking
Yes
304 Stainless Steel
Stainless Steel Grade
304 Stainless Steel
60D ยฑ 5
Durometer
60D ยฑ 5
1 1/4
Wheel Width
1 1/4
Delrin
Wheel Bearing
Delrin
300 lbs
Maximum Capacity (lbs)
300 lbs
5 1/8"
Overall Height
5 1/8"
3 1/4
Swivel Radius
3 1/4
Blue
Color
Blue
ER17ER21ER25ER26ER27ER28ER29ER9GR91GR95HK1/2RD3/4SQ3/4SQ7/8-GRTS-S1TS-S2TS-S3TS-S7TS22TS26N
Stainless Steel Stem Add Ons
ER17, ER21, ER25, ER26, ER27, ER28, ER29, ER9, GR91, GR95, HK1/2, RD3/4, SQ3/4, SQ7/8-GR, TS-S1, TS-S2, TS-S3, TS-S7, TS22, TS26N, TS61
PTBTB
Brake Codes
PTB, TB
LA
Lubeย Axleย Code
LA
Weight
Weight
2.75 lbs

Description

4″ All Polyurethane Wheel. Shown in photo with 5″ wheels. This economy stainless steel K3 stem caster is formed from 304 stainless stamped steel, and lacks a grease fitting in the swivel bearing. The center pin of this stainless steel stem caster is a ยฝโ€ diameter steel rivet which holds the swivel raceways together and the diameter of the axle bolt is โ…œโ€. Economy Stainless Steel Stem Caster Model K3 caster brackets have two rows of ball bearings rotating on raceways for smoother swiveling. This caster is excellent for washdown situations due to having no swivel bearing cover or a grease fitting, which helps facilitate water draining through the swivel bearing and raceways. This stem caster performs best if you limit the load to no more than 1000 lbs on a set of 4 Model K3 casters.

This solid all polyurethane industrial caster wheel was developed for sanitary and washdown applications, and is capable of rolling indoors or outdoors. The blue all polyurethane (โ€œAPโ€) caster wheel is manufactured in 1-ยผโ€ and 2โ€ wide; with diameters ranging from 3โ€-5โ€ and 4โ€-8โ€. Caster City manufactures this (โ€œAPโ€) blue all polyurethane wheel to come with a roller bearing, delrin bearings, or a sealed precision ball bearing and all bearing options are available in stainless steel as well. The temperature range of this industrial caster wheel is -50ยฐto 180ยฐ F and the durometer of the polyurethane is Shore 60D.

These wheels are non marking and non conductive. The absence of a metal center eliminates bond failure as a cause for wheel replacement. These caster wheels are especially suited for use with stainless steel casters in wet and corrosive applications. They are designed for use in Pharmaceutical Laboratories, Hospitals, and Food Processing Plants – wherever a clean sanitary design is desired. These wheels are not recommended for applications involving shock, overloading, abuse, obstructions, poor floors, or for storage (standing) loads. Hardness is 60 – 65 Durometer Shore D. Temperature range is -20ยฐ to 180ยฐ F.

These wheels are designed for use in a wet environment and they eliminate the possibility of tire separation.

FAQ

Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel

What is the Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel?

The Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel is a light-duty caster made from stamped 304 stainless steel, designed for wet, corrosive environments. It features a 4″ blue all polyurethane (AP) wheel (also available in 3″ to 5″ and 4″ to 8″ diameters, 1-1/4″ or 2″ widths) with a Shore 60D-65D durometer, operating from -20ยฐF to 180ยฐF. The swivel has a double ball raceway with a 1/2″ stainless steel rivet, a 3/8″ axle bolt, and supports up to 1000 lbs for a set of four casters.

What environments is the Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel suited for?

This caster is designed for pharmaceutical labs, hospitals, and food processing plants requiring sanitary designs. Its 304 stainless steel frame and all polyurethane wheel resist rust and chemicals in wet or corrosive conditions, making it suitable for washdown applications while meeting NSF and ROHS standards for hygiene.

What is the weight capacity of the Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel?

The Model K3 with All Polyurethane Wheel supports up to 1000 lbs for a set of four casters (250 lbs per caster) for manual movement. To avoid overloading, divide the total equipment load by the number of casters, ensuring each casterโ€™s capacity exceeds the calculated load for uneven surfaces or dynamic forces.

What is the temperature range of the Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel?

The all polyurethane wheel operates in temperatures from -20ยฐF to 180ยฐF, suitable for light-duty applications in washdown or sanitary settings. For higher temperature needs, such as autoclaving, consult Caster City at 800-501-3808 to explore alternative wheel options.

What are the key features of the Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel?

It features a 304 stainless steel frame, a double ball raceway swivel with a 1/2″ rivet, and a 3/8″ axle bolt with an optional lube axle. The 4″ all polyurethane wheel (Shore 60D-65D) is non-marking, non-conductive, and has no metal center, with bearing options like roller, Delrin, or sealed precision ball bearings in stainless steel. It lacks a dust cap and grease fitting for better washdown drainage.

What wheel options are available for the Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel?

The Model K3 comes with a 4″ all polyurethane wheel (also available in 3″ to 5″ and 4″ to 8″ diameters, 1-1/4″ or 2″ widths) with bearing options including roller bearings, Delrin bearings, or sealed precision ball bearings, all available in stainless steel. These wheels are designed for sanitary and washdown applications but not for shock, overloading, or poor floors.

Is the Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel resistant to chemicals?

Yes, the 304 stainless steel frame resists corrosion from water, chemicals, and washdowns. The all polyurethane wheel resists oils, cleaning solutions, solvents, and acids, making it suitable for food processing, labs, and healthcare settings with frequent sanitation.

What is the durometer of the Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel?

The all polyurethane wheel has a Shore D durometer of 60 to 65, providing a hard, durable surface that withstands light-duty use while maintaining smooth rolling and floor protection in sanitary applications.

What is the lead time for the Economy Stainless Steel Stem Caster Model K3 with All Polyurethane Wheel?

The Model K3 has a fast lead time, typically 2 days, allowing quick delivery for industrial buyers. Orders can be placed through Caster Cityโ€™s website or by calling 800-501-3808 for prompt processing.

The Model K3 supports a wide range of stem types for mounting:

Expanding Rubber Stems (for round tubes, secured with a knurled nut):
ER9: Fits 7/8โ€ณ to 1โ€ณ round tubes, 1-7/8โ€ณ length, expands 0.730โ€ณ to 0.851โ€ณ.
ER27: Fits 7/8โ€ณ to 1โ€ณ round tubes, 1-7/8โ€ณ length, expands 0.852โ€ณ to 0.927โ€ณ.
ER28: Fits 1โ€ณ to 1-1/16โ€ณ round tubes, 1-7/8โ€ณ length, expands 0.928โ€ณ to 1.029โ€ณ.
ER29: Fits 1-1/16โ€ณ to 1-1/8โ€ณ round tubes, 1-7/8โ€ณ length, expands 1.030โ€ณ to 1.140โ€ณ.
ER17: Fits 1-1/8โ€ณ to 1-1/4โ€ณ round tubes, 2-1/4โ€ณ length, expands 1.141โ€ณ to 1.303โ€ณ.
ER25: Fits 1-1/2โ€ณ to 1-9/16โ€ณ round tubes, 2-1/4โ€ณ length, expands 1.300โ€ณ to 1.425โ€ณ.
ER26: Fits 1-5/8โ€ณ to 1-11/16โ€ณ round tubes, 2-1/4โ€ณ length, expands 1.426โ€ณ to 1.589โ€ณ.
ER21: Fits 1-7/8โ€ณ to 1-9/16โ€ณ round tubes, 2-1/4โ€ณ length, expands 1.590โ€ณ to 1.950โ€ณ.

Grip Ring Stems (for sockets, secured by a grip ring):
GR91: 7/16โ€ณ diameter, 1-7/16โ€ณ length, 1-1/8โ€ณ usable length below grip ring.
GR95: 7/8โ€ณ diameter, 1-7/8โ€ณ length, 1-1/2โ€ณ usable length below grip ring.

Square and Round Metal Stems (for square or round metal tubes):
SQ3/4: 3/4โ€ณ square stem, 1-1/4โ€ณ length, fits 3/4โ€ณ square tubes, 1-1/8โ€ณ usable length.
SQ7/8-GR: 7/8โ€ณ round stem with grip ring, 2-1/4โ€ณ length, fits 7/8โ€ณ round tubes, 1-1/2โ€ณ usable length.
SQ7/8: 7/8โ€ณ round stem, 2-1/4โ€ณ length, fits 7/8โ€ณ round tubes, 1-1/2โ€ณ usable length.

Threaded Stems (for threaded holes or with a nut):
TS81: 3/8-16 thread, 1โ€ณ length.
TS82: 3/8-16 thread, 1-1/2โ€ณ length.
TS22: 1/2-13 thread, 1-1/2โ€ณ length.
TS26N: 1/2-13 thread, 2-3/4โ€ณ length.
TS5/8: 5/8-11 thread, 1-3/4โ€ณ length.
TS3/4: 3/4-10 thread, 1-3/4โ€ณ length.
TSC1: 5/8-11 thread, 4โ€ณ length.
TSC2: 3/4-10 thread, 4โ€ณ length.
TSC3: 3/4-10 thread, 6โ€ณ length.
These stem types and sizes ensure compatibility with a wide range of equipment setups in light-duty applications.

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 youโ€™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 Partsย 
  • Majority of Orders Processed and Shipped in 2 Days or Less
Call us during the design phase of your project, we can help you avoid costly modifications once fabrication has started. We guarantee what we recommend.Industrial & Heavy Duty Casters | Caster City

If you have any questions about your measurements, please call 800-501-3808