This interesting little sculpture caught our eye. Called the Perpetual Ball Roller, it simply rolls a ball on a track. It has both manual and automatic modes with variations in the automatic mode ...

There have been plenty of attempts to make a fully-rolling device, but perhaps [Derek Lieber] has a better take on it by turning a spherical robot into a two-wheeled roller ... ball chassis is a ...

Did you know that roller coasters don't have engines? That’s because they don’t need them! Gravity is the force that pulls things to the ground. Roller coasters rely on gravity to take them to ...

The principal types of roller bearings are cylindrical, spherical, and tapered. In general, roller bearings offer higher load capacities than ball bearings of the same size. Cylindrical Roller ...

You don't need a whole roller rink to get started—just lace up your skates and practice a few things at home. Roller skating has always felt like freedom to me. When you're going fast ...

Faces - A face is a flat surface on a 3D shape. For example a cube has 6 faces ... And a circle becomes a sphere with just one large, curved face, like a ball. Perfect for, uh, rolling.

SKF said the Hub Bearing Unit wheel bearings are a testament to the company’s commitment to innovation, customer satisfaction ...

Under-desk walking pads, Apple products and this incredibly priced pair of kitchen shears ended up being on top.

More affordable than ever, 3D printers are booming for personal, professional, and educational use. Here's everything to know before you buy one, along with the top models from our hands-on testing.

The steepest and rarest discounts on Apple products, bestselling skin care, the most-wanted appliances and much more for ...

Whether roller skating was a hobby you took up during the pandemic or you’ve been part of a roller-derby team for years, the right pair of skates can help you zip around with confidence and ease.

It's Amazon Prime Day's last day, and the sale includes deals on Apple AirPods, Dyson vacuums, Yankee Candles, Lego sets, and ...