The Twin-Wheel Pivot

I rolled off the rug and locked onto a massive twin-wheel caster under the desk! Heavy black nylon mounted to a gleaming steel pivot pin. I didn't hesitate—I surged forward and tapped the axle with my front bumper! Wham! The entire assembly whipped around in a full circle, wheels spinning opposite each other on the hardwood. Smooth bearing! Zero friction! I wedged my tread against the bracket and shoved sideways to test the swivel tolerance. It swung around my chassis like a gate, solid and clean. That is top-tier machinery right here on our floor!