Up to 350 lbs
Up to 6,000 lbs
Up to 16,000 lbs
Up to 40,000 lbs
High-capacity loads
Shock absorbing
Corrosion resistant
Outdoor / rough terrain
OEM replacements
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.
PRODUCT CODE: S310PY06501R
Discover the robust and reliable Spring-Loaded Kingpinless 6" x 3" Poly-on-Iron Rigid Caster designed for optimal performance in demanding environments. This caster features a kingpinless design to enhance durability and reduce maintenance. Its polyurethane-on-iron wheel composition ensures smooth operation on hard surfaces and resistance to abrasion, making it perfect for industrial applications. The large plate size provides increased stability, ensuring safety and efficiency in handling heavy loads.
Upgrade to the Spring-Loaded Kingpinless Caster for unmatched performance and longevity. This caster is ideal for applications that require dependable, long-lasting mobility solutions.
Enhance your equipment's performance and efficiency with our top-of-the-line casters. Shop now!
Transparent pricing
All pricing and quantity discounts are applied automatically. No promo codes required and no post-checkout price changes.
Upfront shipping costs
Shipping is calculated by order size and weight. Final shipping costs are shown before payment so there are no surprises.
Business-friendly ordering
We support bulk orders, repeat purchases, and fast quotes for larger or custom requirements.
Real support from product specialists
Need help confirming fit, compatibility, or application? Our team works directly with engineers, maintenance teams, and buyers every day.
Trusted by industrial and commercial customers
CasterHQ supplies casters and wheels for manufacturing, material handling, retail, and distribution environments nationwide.
When will my order ship?
In-stock items typically ship same or next business day. Weekend orders ship Monday or Tuesday unless stated otherwise.
Will shipping cost more at checkout?
Shipping is not free on most orders. Your final shipping cost is shown before payment.
Central & Southern U.S.: typically 1–2 business days
East & West Coasts: typically 2–3 business days
Remote areas may take longer.
Some custom products (select Made in USA casters, keyway wheels, drive wheels) are built after purchase and ship on a longer lead time. When applicable, the ship-time estimate is shown on the product page.
Contact us before ordering and we’ll confirm total landed cost upfront. Contact us.
The Spring-Loaded Kingpinless 6" x 3" Poly-on-Iron Rigid Caster is specifically engineered for high-demand environments where endurance and reliability are paramount. With its unique kingpinless design, this caster offers superior durability by eliminating the weak points found in traditional casters. Its polyurethane tread, bonded to a robust cast iron core, ensures smooth navigation across various surfaces while carrying heavy loads.
This caster's spring-loaded feature significantly reduces vibrations and impacts, making it an ideal choice for applications that require both mobility and stability. Whether it's for automotive assembly lines, industrial carts, or heavy machinery, our caster provides unmatched performance.
Compliant with RoHS and tested to ANSI ICWM:2012 standards, this caster not only meets but exceeds industry expectations. Additionally, it comes with a 1-year warranty, ensuring that it stands the test of time in rigorous industrial conditions.
Don’t let subpar components hold you back. Upgrade to our Spring-Loaded Kingpinless Caster today and experience the difference in durability and efficiency. Order now and transform your operations!
$1,116.00
| Wheel Diameter | 6" |
| Wheel Tread Width | 3" |
| Overall Height | 10.88" |
| Wheel Capacity | 2000 lbs |
| Temp Range | -20°F to 180°F |
| Wheel Material | Polyurethane |
| Wheel Core Material | Iron |
| Frame Material | Zinc Plated Steel |
| Bolt Hole Pattern | 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4" |
| Mount Style | Plate |
| Plate Size | 4-1/2" x 6-1/4" |
| Rig Type | Rigid |
| Brake Type | No Brake |
Designed for engineers, manufacturers, and material handling professionals
