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.










Durastar Bearing Components' Spanner Bushings are engineered for precision, strength, and compatibility. Built to serve as essential load-bearing adapters in caster and wheel assemblies, these bushings help maintain optimal alignment and reduce friction between moving parts. Their robust construction ensures resistance to wear and corrosion, even in high-moisture or industrial settings.
Designed for universal fit, these spanner bushings are available in multiple sizes to accommodate a wide range of axle diameters and wheel hubs. Whether you’re assembling carts, dollies, or industrial rolling equipment, Durastar’s bushings offer secure, consistent performance to help extend bearing and wheel life.
Each bushing is crafted with reliability in mind, combining precision machining with quality materials that stand up to tough environments. From factory floors to mobile medical units, trust Durastar to deliver components that support smooth, efficient movement under pressure.
Upgrade your caster and wheel systems with Durastar’s high-quality spanner bushings. Built for reliability, made for durability—get the right fit for your bearing needs today.
