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Asymmetric tooth gears and their rating are not described by existing gear design standards. Presented is a rating approach for asymmetric tooth gears by their bending and contact stress levels, in comparison with symmetric tooth gears, whose rating are defined by standards. This approach applies finite element analysis (FEA) for bending stress definition and the Hertzian equation for contact stress definition. It defines equivalency factors for
practical asymmetric tooth gear design and rating. This paper illustrates the rating of asymmetric tooth gears with
numerical examples.
in the performance and life of
a rolling element bearing. Less
than 10 percent of bearings reach their theoretical L10 life, and poor lubrication can be attributed to 80 percent of those that fall short. Ideally, a lubricant forms a film layer between moving components in a bearing, separating moving parts, minimizing friction and
preventing wear between balls or rollers, raceways and retainers. Lubricants also protect metal surfaces from corrosion and moisture, dissipate heat and can even prevent the ingress of contaminants.
Lubrication management should be standard operating procedure at any manufacturing facility.
Vital to both operational and maintenance personnel,
a strong, coherent and specific lubrication program will have
lasting results in machine efficiency and maintenance. Of course, even those with the best intentions can’t always keep up with the challenges presented day-to-day on the manufacturing
floor. Thankfully, PTE is here to help with eight steps to selecting, storing, analyzing and managing your lubrication requirements.
Dale Renner, CBS and sales representative at Bearing Headquarters Co., explains how his bearing expertise
helped solve a customer’s problem
and saved significant downtime and
cost.
In 1941, the federal Aircraft Engine Research Laboratory set up shop in Cleveland, Ohio. This year, and several name changes later, what is now the NASA Glenn Research Center celebrates its 75th anniversary.
As part of the year-long festivities,
Glenn’s adjunct Lewis Field main campus will be open to the public May 21 and 22, and Plum Brook Station in Sandusky, Ohio will hold its open house June 11 and 12.
Power Transmission Engineering is collaborating with the Bearing
Specialists Association (BSA) on a special section within the magazine.
Bearing Briefs will present updated reports on bearing topics for each issue in 2016.
Complimentary access to all BSA Bearing and Industry Briefs is available on the BSA
website at www.bsahome.org/tools.
Energy’s
endless energy efficiency
game of whack-a-mole, motors have historically always been one of the go-to moles. They’ve been in the spotlight since 1992. Over the past few decades, repeated efficiency laws have seen motor efficiency get whacked into tighter and tighter shape.
Modeling and simulation is
a key driver of innovation.
Whether it’s general manufacturing,
consumer goods or life sciences, the
ability to realistically model and simulate the response of parts, sub-systems and complete assemblies to increase accuracy and repeatability is vital in today’s analytical world.
An independent cheese packager
in central Wisconsin packages millions of pounds of cheese every year. Whether shredded, sliced, crumbled or waxed, each package is designed specifically for a customer’s unique needs. As a “toll processor,” production line speed is critical to productivity as well as profitability.