The analogy with record-player motors is very apt. I've restored a bunch of turntables, and the motors tends to not have been designed with long life in mind. Nor are they designed to provide reasonable torque, which is something you'd think would be a requirement. Like so many other things, the prime design requirement seems to have been, make it cheap. So typically the bearings don't maintain lubrication all that well and they get gunked up pretty quickly, reducing torque, and so the motors can't turn the platter. Not as bad as your one-bearing Sears refrigerator motor, but not great design either.
Festo's BionicKangaroo combines pneumatic and electrical drive technology, plus very precise controls and condition monitoring. Like a real kangaroo, the BionicKangaroo robot harvests the kinetic energy of each takeoff and immediately uses it to power the next jump.
Design News and Digi-Key presents: Creating & Testing Your First RTOS Application Using MQX, a crash course that will look at defining a project, selecting a target processor, blocking code, defining tasks, completing code, and debugging.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.