A brief overview of the induction motor, including the basics of construction, performance and variable speed drives.

This article describes a series of tests that can be performed by the average user, with little experience, and without sophisticated measuring instruments, to quickly determine the most important performance characteristics of linear motion systems.

For the most accurate measurements, miniature and instrument ball bearing dimensions should be measured with a calibrated air gauge. A good second option is a calibrated optical comparator. On occasion, it may be necessary to use a calibrated, hand-held micrometer to double-check a measurement or for simple verification while working in the field.

When designing spur teeth, is there a formula/guideline/design guide for determining the amount of crowning?

For design engineers and purchasing agents alike, bearings can sometimes be like family. Oh, you know - can't live with 'em, can’t live without 'em.

It's a fact that drive systems wouldn't function properly or efficiently without couplings. They quietly go about their business of transferring motion from one drive element to the next. In the PT market today, couplings have the unique challenge of satisfying a variety of customer needs including tighter tolerances, higher speeds and a more versatile selection process.

The complete Product News section from the December 2013 issue of Power Transmission Engineering.

Video from Maxon Motors, Hannover Messe on our LinkedIn page and the NFPA annual conference on our Facebook page.

High-speed transit system the dreamwork of ideators or idiots?

A discussion of the basics in DC drives, DC motors, AC drives, AC motors and synchronous motors.