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TECHNICAL ARTICLES | 2023-03-21

Ball Bearing Inner Ring Fits and Creep

I think I spend more time talking about ball bearings today than at any other time in my career. Ball bearings have always had a large place in automotive, but not typically in high demand positions—other than a few niche areas. High demand positions, such as axles and planetaries, were typically reserved for tapers, needles and cylindricals. The landscape is changing quickly.

INDUSTRY NEWS | 2022-04-28

SMT Webinar Examines Software Tips and Tricks

SMT's latest webinar "MASTA Support - Tips, Tricks and FAQ" will take place May 4, 2022. The SMT customer support team receive queries covering all areas of MASTA, with industry 'hot topics' inevitably arising. In this webinar, SMT engineers focus on answering some of the queries that frequently make it into their support inbox. 

PRODUCT NEWS | 2022-04-20

Gates Launches Belt Drive Software Platform

Gates has announced the launch of Gates Design Power, a new software platform offering multiple digital design tools to support the engineering and specification of belt-drive systems across a broad array of applications, making the process easier and more robust than ever before.  

TECHNICAL ARTICLES | 2020-12-01

Rolling Bearing Performance Rating Parameters Review and Engineering Assessment

The main function of rolling bearings is to support load and transmit rotational movement with minimum energy loss. In order to achieve this, bearings are manufactured with particularly good quality fatigue resistance materials, proper design and tight manufacturing tolerances. Particular emphasis is put in both the macro, and micro geometry of the working shapes and surfaces of the raceways. Rolling bearings come in many types and sizes as ball and roller bearings for radial and thrust loads.
BEARING BRIEFS | 2016-03-01

Load Ratings & Bearing Life

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.
TECHNICAL ARTICLES | 2015-02-01

Desktop Engineering - How to Calculate Dynamic and Static Load Ratings

When comparing bearing suppliers, engineers are often left with few options other than to compare dynamic load ratings and corresponding life calculations. Of course, we can look at steel and manufacturing quality; but if we are comparing sources of similar quality, those items may not provide a large contrast. It often surprises people to learn that bearing capacities are calculated values, not tested values. Lately, however, a trend is emerging for bearing suppliers to increase their ratings for higher performance bearings that have premium features such as higher quality steel and specilaized heat treatment. Bearing companies are under intense competitive pressure to make every feature add to the dynamic capacity of their bearings because it is very well understood that an increase in capacity adds to the bottom line.
ASK THE EXPERT | 2015-02-01

Ask the Expert

Questions by readers answered by Experts in the field.
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FEATURE ARTICLES | 2014-08-01

Critical Factors for Proper Product Selection and Sizing

"Well begun is half done," a quote that most reference materials attribute to Aristotle, certainly applies when selecting mechanical power transmission products. A selection process that is well thought out at the start can ensure that the product selected will be properly sized and appropriate to the application at hand.
FEATURE ARTICLES | 2013-08-01

Showstoppers - Gear Expo 2013

Our special advertising section featuring Gear Expo exhibitors.
VOICES | 2013-06-01

Predictive Maintenance - There Is an App for That

Implementing a predictive maintenance (PM) program can be tough. Despite its proven success, many companies have been operating the same way for over 50 years and don’t know where to start. Understanding where to start and where to focus is critical. The intention of this article is to give insight to start and sustain an effective program using today’s technology and devices.
FEATURE ARTICLES | 2013-04-01

New Motor Technology

Novatorque energy efficient motors, Portescap smaller-size brushless DC motors, Pittman customized motors, Kollmorgen stainless steel motors, Crouzet expanded motor series, and a report from IHS on rare earth mineral supply.
PRODUCT NEWS | 2013-04-01

Product News

SKF energy-efficient bearings, Bishop Wisecarver guided motion system, Weiss torque rotary table, Mico wireless braking system, Nord worm gear series, and SKF expanded range of couplings.
PRODUCT NEWS | 2012-12-01

Product News

The complete Product News section from the December 2012 issue of Power Transmission Engineering.
FEATURE ARTICLES | 2012-12-01

The Fundamentals of Specifying and Selecting Gear Drives

Gear drives deliver power to industrial equipment such as bulk material conveyors, mixers, pumps and paper mills. The reliability that translates into greater uptime and profitability begins by specifying and selecting the proper drives for these critical applications.
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TECHNICAL ARTICLES | 2011-02-01

Not All Thin-Section Bearings Are Created Equal

American Bearing Manufacturers Association (ABMA) Standard 9 and ISO 281 give equations for calculating the basic dynamic radial load rating for ball bearings. These equations are based on a number of assumptions, many of which are not valid for thin-section bearings. (Thin-section bearings are described in ABMA standard 26.2.) Nevertheless, many thin-section bearing catalogs report load ratings based on these equations. Kaydon has developed a new method for calculating the dynamic radial load rating for thin-section ball bearings. The new method uses the contact stress and the number of stress-cycles-per-revolution to calculate the capacity. The new numbers are based on five years of actual test results. These equations can also be used to calculate the dynamic radial load rating for four-point contact ball bearings, which are not covered in ABMA standard 9 or ISO 281.
TECHNICAL ARTICLES | 2010-08-01

Energy Efficiency by Using Innovative Bearing Solutions

Based on simulation methods and calculation tools developed by the Schaeffler Group and presented in the first part of this paper, three approaches regarding increased efficiency based on rolling bearings are presented.
INDUSTRY NEWS | 2010-08-01

Industry News

The complete Industry News section from the August 2010 issue of Power Transmission Engineering.
EVENTS | 2009-12-01

Michigan Eyes Investment at AWEA Small and Community Wind Conference

The first trade show dedicated specifically to small and community wind took place in Detroit, Michigan November 3–5. Denise Bode, American Wind Energy Association (AWEA) CEO, was pleased with the turnout for the event and the increasing potential for this segment of the wind energy market.
FEATURE ARTICLES | 2009-10-01

Hardware-Software Synergy Automates Power Plant Data Collection

Robotics and other advanced automation technology systems are viewed as a looming threat to some in the plant maintenance field. Although there is a constant battle for some workers to remain useful while machines are continuously fulfilling more roles on the plant floor, there are those who in turn have found a better use of their newly freed time.
TECHNICAL ARTICLES | 2008-10-01

Gear- or Actuator-Driven, These Bots Are Cutting-Edge

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?
PRODUCT NEWS | 2008-06-01

Product News

The complete product news section from the June 2008 issue of Power Transmission Engineering.
TECHNICAL ARTICLES | 2008-04-01

Torque Arm Design Considerations for Shaft-Mounted Speed Reducers

Most manufacturers of shaft-mounted speed reducers offer torque arms for their products. However, in some situations, a machine designer may be required to design his own.
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