The Revolution Blog

Ultra Maxi-Duty caster: Go inside the belly of this 40K-load beast

Thursday, Oct 27, 2016

In the world of heavy-duty manufacturing, bigger is beautiful. But it’s what’s inside that really counts. Especially when you put your heart and soul into the craftsmanship of your product—like we do every day here at Hamilton.

So once in a while, we like to pause and provide a rare peak inside the brains behind the beauty. This time, it’s about a product that’s been in high demand lately: our Ultra Maxi-Duty (UMD) Casters—the highest capacity production caster series on the market.


The UMD caster pictured above was recently optioned out to a customer with press on polyurethane wheels, four-position swivel lock and heavy-duty contact brake.

With a load rating up to 40,000 pounds per caster, these whirling workhorses can tow a planet of crushing cargo without breaking a sweat. They’re ideal for extreme load applications that roll through shipbuilding, military and aerospace manufacturing.

But to really understand how this caster crushes all capacity limits, you need to go deep.

Behold the UMD in all its cross-section glory:

To manufacture the most durable super-capacity casters possible, our engineers cleaned the slate to go above and beyond basic requirements. The mounting plate is an immense 14” x 14” and 1” thick. But the true innovation can be found in two massive precision thrust ball bearings. The 13”-diameter bearing boasts an impressive 234,000 pound load rating, while the second 7”-diameter one is rated at a comfortable 100,000 pounds. A third highly specialized four-point contact bearing completes the awesome assembly, making easy swiveling under extreme load a joyride.


Whereas it usually takes eight or more casters to move colossal loads, it only takes four UMD casters. That makes your job simpler and reduces maintenance costs. You can save the time of requesting a custom-designed caster and select from the UMD’s comprehensive, “build-ready” series.

Ready to throw your weight around? Hamilton is here to catch you with all the UMD product details.

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