ask the expert
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This issue's focus on bearings includes a number of important and informative articles about one of the most key components in any machine design.
Questions by readers answered by Experts in the field.
A reader asks for clarification on last issue's Ask the Expert column about ball screw sizing.
A reader asks whether sleeve bearings can take the place of more expensive tilting pad bearings in a high-speed compressor application.
A reader asks what are the required parameters to properly specify a gear.
When designing spur teeth, is there a formula/guideline/design guide for determining the amount of crowning?
The complete Product News section from the September 2017 issue of Power Transmission Engineering.
The complete technical calendar from the February 2017 issue of Power Transmission Engineering.
One of our goals at Power Transmission Engineering is to help you understand, identify and select the best technology for your mechanical power transmission or motion control applications. With every project, you have to decide which components to use, and which suppliers, based on functionality, quality and price. We aim to help you make those decisions informed by providing the latest information on current technology, especially when it comes to mechanical components.
It's no secret that conveyor systems are the primary market for gearmotors, and so it shouldn't be much of a surprise that gearmotor manufacturers are looking for ways to cater to that market's needs. From Brother's new VFDs to Siemens' Simotics S-1FG1, a lot of the new solutions in the industry have their own unique quirks, but all fall into a few common veins.
News from around the Industry
The complete Industry News section from the March 2017 issue of Power Transmission Engineering.
News about recent products in the Industry
One of the best things about being a journalist — whether for example it be reporting on manufacturing, politics, show business, or anything else — is being paid to “go to school” and learning about any number of things that you were perhaps ignorant of at the outset.
This special advertising section features some of our VIP exhibitors.
Process Expo and Pack Expo Highlight the Latest Technology for Food & Beverage Applications.
Gearmotor manufacturers find new ways to push the envelope. (With Sidebar on new alternative to planetary gearboxes)
This is an article about motors - preventive motor maintenance, actually. And something else - mechatronics. In today's high-tech manufacturing and industrial use environments, it is near impossible to talk about equally complex motor maintenance and repair-or-replace protocols without it.
News about industry products.
How to Ensure Reliable Performance, Increased Efficiency and Lowest Total Cost of Ownership.
"For your safety, please keep your hands, arms and legs inside the vehicle at all times."
Furrion is developing a mech in the hopes of launching racing into realms so far only explored by science fiction.
News From the gear Industry
If there are two things that are in tight supply in the industry, it's time and talent. Manufacturers are always pressured to do more faster, and the industry is producing fewer experts to help them do it, so the industry's had to get crafty and find what time-cutting procedures they can.
With Pack Expo Las Vegas around the corner, we took a look at the state of the packaging industry today to see what you can expect at the show. The answer is more automation.
The complete Industry News section from the September 2017 issue of Power Transmission Engineering.
"New" Technology Turning Heads and Profits.
Bill Walton – a 7 foot tall anomaly from the annals of basketball history who wears tie-dye shirts, listens to the Grateful Dead and, according to his own outlandish proclamations, hasn’t taken an indoor shower in 35 years – is well-known for looking at average accomplishmentsand being overcome with extreme fits of emotion.
The complete product news section from the December 2008 issue of Power Transmission Engineering.
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.
This article presents the first kW-Class, 3-phase GaN-based inverter. Hard-switched at 100-kHz PWM, its heart is a 6-in-1 power module with 600-V GaN power HEMTs, achieving a new efficiency of 98.5%, a more than 2% improvement.
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.
"Restless Planet" transports guests to a Jurassic landscape with more than 100 animatronic dinosaurs.
Following is a presentation of a gear design based upon a theoretically perfect gear technology, for which an overview is offered for consideration. What follows is a report on the design's testing and subsequent manufacture of a hypoid gear pair for a 1999 Ford Mustang.
A wide variety of companies displayed mechanical power transmission and motion control technologies at Pack Expo, held in November in Chicago. The event, which is the largest packaging and processing trade show in North America, attracted more than 48,000 attendees, according to show owner and producer PMMI. The four-day event included 2,352 exhibiting companies, an increase of more than 19 percent from the previous show in 2012.
When talking about high-end machining or manufacturing applications that include direct-drive technology, one of the key advantages of utilizing this particular transmission method is its endurance. Because of the very nature of direct-drive motors they are able to operate at peak performance levels indefinitely — without any kind of wear or aging — as long as the motor isn’t pushed past its capacity. Unfortunately, because this isn’t a perfect world, unexpected things can happen which can cause the motor to overheat. Whether the heat source is due to a parameter being input incorrectly, or an unexpected external force causing more resistance than expected — it is important to have certain forms of thermal protection in place. Since torque motors are built in such a way that they cannot be repaired and yet maintain their efficiency, it is vital to prevent any overheating — thus precluding the need to purchase a new one.
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.
A new solution has been developed around the use of microprocessor-controlled prostheses. Just like natural limbs, these can react automatically, adapting to the current situation.
Fans of Arthur C. Clarke may remember a concept in his 1979 novel, The Fountains of Paradise, of an orbital elevator used to raise payloads from the ground to a satellite as a more cost-effective means of transporting material to outer space.
The secondhand on the Doomsday dial ominously spins around the face, slowly but ever so surely inching the motor industry towards its inevitable terminus:
It took the introduction of fractals and chaos theory to get Bruce Shapiro interested in motion control.
The complete product news section from the June 2009 issue of Power Transmission Engineering.
In this Ask the Expert article, Hans Wendeberg from SKF discusses some of the things you need to know when calculating bearing diameters.