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98.7% On-Time Ship Rate Across All Orders
200,000+ Orders Fulfilled for OEM & MRO Teams Nationwide
100+ Years of Combined Caster Industry Experience
Automatic Bulk Pricing | OEM & MRO Volume Discounts Applied at Checkout
Up to 350 lbs · Light Duty Applications
Up to 7,200 lbs · Industrial Duty
Up to 17,500 lbs · Heavy Industrial
Up to 40,000 lbs · Extreme Load Applications
Up to 40,000 lbs · Increased Maneuverability
Up to 3,100 lbs · Industrial Shock Absorbing
Up to 3,200 lbs - Corrosion Resistant
Stainless Steel
Up to 8,400 lbs.
Explore All Specialty Caster Applications
From Everyday Use to Niche Solutions
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.
Most in-stock items ship same or next business day. Shipping rates shown at checkout.
PRODUCT CODE: S-AEZFWH-4SPB-1
Dive into the unparalleled strength and durability of our 4" x 2" Ergo-Glide Polyurethane (85A) on a Cast Iron Wheel. Equipped with 1/2" Sealed Precision Ball Bearings, this caster ensures smooth operations even under heavy loads.
Crafted for the aerospace industry, our Spinfinity caster offers reliability, efficiency, and precision. Its spring-loaded design ensures maximum shock absorption, making it a top choice for sensitive equipment and demanding environments.
Our team of experts is here to guide you. Whether you're equipping an aerospace lab or need a robust wheel for industrial applications, trust Hamilton for quality and performance.
Note: Explore related products and customer reviews below.
Wheel Diameter (in.): 4
Wheel Face (in.): 2
Wheel Type: Ergo-Glide
Wheel Color/Finish: Blue Poly on Gray Center
Wheel Core Material: Cast Iron
Wheel Material @ Tread: Polyurethane
Overall Height (in.): 7.75
Swivel Offset (in.): 2.5625
Bearing Type: Precision Sealed Ball
Replacement Wheel: W-420-SPB-1/2
Caster Rig Type: Kingpinless
Caster Color/Finish: Platinum Powder
Swivel or Rigid caster: Swivel
Mounting Plate (in.): 4 x 5
Mounting Bolt (in.): 0.375
Mounting Plate Length (in.): 4.5
Mounting Plate Width (in.): 4
Shipping Weight (lbs.): 17
Max. Capacity 1 (lbs.): 980
Min. Capacity 1 (lbs.): 100
Note: For further information, contact our product support team.
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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.
Designed with the rigorous demands of the aerospace industry in mind, the Hamilton Aerospace 4-inch Spinfinity Swivel Caster has established itself as a frontrunner in caster technology. Whether you're handling sensitive equipment or seeking smooth operations under heavy loads, this caster is tailored for you.
The Ergo-Glide Polyurethane layer promises smooth mobility across a variety of surfaces. Underneath, the Cast Iron Wheel ensures durability even in demanding environments. The innovative Spinfinity Technology facilitates continuous rotation, while the Spring-Loaded Design offers unmatched shock absorption. Its 1/2" Sealed Precision Ball Bearings vouch for fluid movement, further enhancing user experience.
While the Hamilton Caster is crafted with aerospace applications in mind, its robust design makes it versatile for various terrains and industrial environments. Whether you're equipping a lab, a warehouse, or an aircraft, this caster's resilience and precision will exceed expectations.
Need guidance on installation or maintenance? Our team of experts stands ready. Trust Hamilton for not only top-tier products but also comprehensive customer support.
Note: Ensure you check our product guidelines and manuals for maximum longevity and optimal performance.
$997.00
Designed for engineers, manufacturers, and material handling professionals