Up to 350 lbs
Up to 7,000 lbs
Up to 16,000 lbs
Up to 40,000 lbs
Shock absorbing
Outdoor / rough terrain
View All Specialty Casters
Browse all specialty caster types
All measurements indicate the wheel diameter by the tread width.
The below capacity ranges indicate the working (dynamic) load that each caster will support. A safety factor should be included in your formula to determine your required load rating per caster.
W/(C-1)=R W is total weight needed to move. C is total number of casters required. R is ideal load rating, with safety factor built in. Divide the total load weight by one less caster than you will use to safely determine load rating.
Plate dimensions shown are overall mounting plate size.
When replacing existing casters, select the closest plate size and verify bolt-hole compatibility.
BHP = Bolt Hole Pattern, shown under each plate.

The Hamilton W-420-125-SSUB-1/2 U-Grooved Wheel showcases the pinnacle of engineering excellence and material quality. Designed for 1 1/4" track diameters, this 4" diameter stainless steel wheel, with a 2" face and 2 1/2" hub length, is equipped with a 1/2" precision ball bearing to ensure smooth, reliable operation in demanding environments. Its stainless steel composition offers unmatched durability and resistance to corrosion, making it ideal for a wide range of industrial applications.
Whether you're navigating the rigors of manufacturing, material handling, or any application requiring precise movement along a track, the Hamilton U-Grooved Wheel is your solution. Its unique U-groove design ensures accurate alignment and smooth motion, while the precision ball bearings reduce friction and wear, extending the life of the wheel.
Designed to meet the needs of a diverse range of industrial applications, this wheel seamlessly integrates into existing systems. Its dimensions and specifications cater specifically to 1 1/4" track diameter requirements, ensuring a perfect fit and optimal performance for your machinery or equipment.
Order processing
In stock. Orders placed before 12pm CT (Mon–Fri) typically ship the same or next business day from our Mansfield, TX warehouse.
Shipping method
Smaller orders ship parcel (UPS/FedEx Ground). Heavy or bulk quantities consolidate to LTL freight. The method and final cost are shown before payment, so there are no post-checkout adjustments.
Payment & procurement terms
New to CasterHQ? Open an account or request terms and send your resale or tax-exemption certificate before ordering so it is applied at checkout.
Volume pricing & quotes
Quantity discounts apply automatically — no codes needed. For large, recurring, or custom requirements, request a bulk quote and our team will confirm pricing, lead time, and total landed freight upfront.
Returns & warranty
Stock items carry a 30-day return policy in unused, resalable condition. Made-to-order and custom items are non-returnable once production starts. All products carry the manufacturer's warranty against defects.
Central & Southern U.S.: typically 1–2 business days
East & West Coasts: typically 2–3 business days
Remote areas and freight deliveries may take longer.
For pallet freight, scheduled releases, or blanket purchase orders, contact our team and we'll confirm total landed cost before you commit. Direct line: 844-439-4335.
The W-420-125-SSUB-1/2 model is a testament to Hamilton's commitment to quality and performance. With its 4" diameter, 2" face, and 2 1/2" hub length, it’s designed for precision and durability. The U-Grooved design and 1/2" precision ball bearing ensure smooth and efficient movements, making it a game-changer for heavy-duty industrial applications.
From manufacturing to warehousing, the W-420-125-SSUB-1/2 wheel stands out with its robust construction and capacity to handle demanding environments. Experience the synergy of precision, durability, and performance with every move, ensuring optimal material handling and operational efficiency.
The W-420-125-SSUB-1/2 wheel is made of high-quality stainless steel, ensuring durability and resistance to corrosion. This makes it an excellent choice for applications that require a high level of cleanliness and corrosion resistance.
The U-Grooved design of the W-420-125-SSUB-1/2 wheel enhances wheel grip and control on tracks. This feature is particularly beneficial in applications where precise movement is required.
The 1/2" precision ball bearing of the W-420-125-SSUB-1/2 wheel allows for smooth and efficient movements. This feature reduces friction and ensures effortless operation, even under heavy loads.
Elevate your operational capacity with the Hamilton U-Grooved Stainless Steel Wheel W-420-125-SSUB-1/2. Every feature is engineered with the modern industrial environment in mind, blending cutting-edge innovations and premium materials to exceed the expectations of the most demanding applications.
This is a Polyurethane wheel. Polyurethane protects finished floors, rolls quietly, and resists most chemicals while carrying heavy loads.
4" diameter x 2" tread width. Verify your axle diameter and hub/bore length against your existing wheel before ordering.
Yes. Most wheels can be paired with a swivel or rigid rig to build a complete caster. Tell us your mount and load and we will spec the rig - request it on our bulk pricing page.
Rated for -40°F to 180°F. Operating outside the rated range can shorten wheel life and reduce capacity.
We accept purchase orders and offer Net 30 on approved accounts, ACH, and all major cards, plus tax-exempt ordering with a resale or exemption certificate. Volume discounts apply automatically; request a bulk quote for large or recurring orders. Stock items carry a 30-day return policy in unused condition (made-to-order items are non-returnable once production starts).
$417.00
| Identification | |
| Brand | Hamilton |
| Dimensions & Mounting | |
| Wheel Diameter | 4" |
| Wheel Tread Width | 2" |
| Load & Performance | |
| Temp Range | -40°F to 180°F |
| Materials & Finish | |
| Wheel Material | Polyurethane |
| Frame Material | Zinc Plated Steel |
4" ATX Solid Thermo Rubber Rigid Flat Free Caster | CasterHQ
4" x 2" · 200 lbs
$39
4" Thermo Rubber Swivel All Terrain Caster – Off Road | CasterHQ
4" x 2" · 250 lbs
$40
4" x 2" Thermo Rubber Rigid Caster – 300 lb | 4" x 4-1/2" Top Plate | CasterHQ
4" x 2" · 300 lbs
$26
View all 4′ x 2′ casters & wheels →
Your selection is highlighted. Every option shares its wheel size and mount; a Direct fit tag means the same mounting plate — a drop-in replacement. Step up or down in load rating, all in-stock.
| Casters (in stock) | Load capacity | Wheel | Type | Overall height | Price | |
|---|---|---|---|---|---|---|
| — | 4" × 2"Polyurethane | — | — | $417.00 | Viewing | |
| 200 lbsHeavier duty | 4" × 2"Gray Rubber | Rigid | 5-5/8" | $39.00 | View → | |
| 250 lbsHeavier duty | 4" × 2"Gray Rubber | Swivel | 5-5/8" | $40.00 | View → | |
| 300 lbsHeavier duty | 4" × 2"Gray Rubber | Rigid | 5-5/8" | $26.00 | View → | |
| 300 lbsHeavier duty | 4" × 2"Rubber | — | — | $20.00 | View → |





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