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For many years bellows couplings have been near the top of the list of flexible coupling choices for high-performance motion systems. Their high
torsional stiffness, low moment of inertia and minimal restoring forces under misalignment make them a preferred choice for maintaining tight control over the load.
In this paper, Edward Hage, founder of specAmotor.com, an online motor calculation and selection tool, focuses on the overheating of electric motors. Presented here is a calculation
method with which the temperature and heat development of a direct current (DC) motor and a brushless motor can be
predicted accurately.
Can direct drive technology improve your bottom line? Manufacturers relying upon drive systems in their production process have long sought ways to improve gearbox efficiency. While a gearbox-driven system has been the mainstay for manufacturers, it has also been, among other things, the source of frequent breakdowns, expensive line stoppages and increasingly costly maintenance.
Part I of this article appeared in the
October 2008 issue. It provided an overview and general classifi cations of power transmission couplings, along with selection and performance criteria for rigid couplings and misalignment-compensating couplings. Part II continues the discussion with selection and performance criteria for torsionally flexible and combination-purpose couplings.
Th e primary sources of bearing failure
are lack of lubrication and contaminant
ingress. Industrial sealing devices are the primary protection against bearing failure. When the sealing device fails, bearing failure is imminent. Th erefore, extending
the life of sealing devices extends bearing life and in turn improves equipment uptime.
Th e signing of a contract for more than 5,000 sets of SKF’s latest high-capacity cylindrical roller bearings (HCCRB) for wind turbines will impart added load-carrying capacity, more
reliability and longer life to the Nanjing Gear Company’s (NGC) line of gearboxes for wind generation applications.
In today’s increasingly competitive global economy, industries and the companies that serve them are always looking for an edge. Price and quality being routinely accepted as a given, businesses—large and small—are always looking for a little help. For the worldwide bearing industry, that help exists in the form of the Bearing Specialists of America (BSA).
Power transmission couplings are widely used for modifi cation of stiff ness and damping in power transmission
systems, both in torsion and in other
directions (misalignment compensation).
Robots are everywhere these days—
bots in the factory, bots in space, bots at the airport, bots in the movies and much, much more. But robots in the operating room?
When a bearing is damaged, it is often removed from service and replaced before it reaches its full, useful and economical life. Advancements in bearing design, materials, bearing maintenance and repair methods have greatly improved the potential for and popularity of bearing repair as an effective way to extend the life of the bearing.