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
Up to 8,400 lbs · Outdoor & Rough Terrain
1,000+ Styles · 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.
Engineered for OEM, MRO, and defense. Spec-match guarantee, engineering RFQ on every quote, fastest shipping in the caster industry.

Experience the pinnacle of mobility solutions with the Durastar Casters S40 SERIES. Each caster features a robust 8" Solid Polyurethane - SPU wheel, meticulously designed for the toughest applications. This unique combination not only offers superior load-bearing capabilities but also ensures smooth movement across a variety of surfaces without marking or degradation.
These casters are engineered to withstand the rigors of heavy industrial use, making them an ideal choice for equipment in manufacturing plants, automotive facilities, and large-scale warehousing operations. With multiple configurations available, including swivel, rigid, and brake options, the S40 SERIES can be tailored to meet the most specific mobility requirements.
Enhance your operations with casters that deliver not just performance but also reliability. Durastar’s commitment to quality ensures that each caster is a testament to durability and ergonomic design, reducing wear on both floors and equipment while maximizing efficiency.
Choose Durastar S40 SERIES Casters for a seamless, durable solution to your heavy-duty mobility needs. Trust in our legacy of quality and innovation for unparalleled performance where it matters most.
These calculators apply to any caster application—even if you’re browsing a different category. Use them to estimate load rating per caster, select wheel material, and estimate push/pull force. Expand any tool for full analysis + a share-ready spec line.
Engineering Tools Hub
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Load Calculator (dedicated)
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Wheel Diameter Calculator
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Failure Diagnosis Tool
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Designed for engineers, manufacturers, and material handling professionals
