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"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.
The glass is at least half-full—and there is no hole in the glass. While fiscal cliff disaster is a possibility, weâ™re thinking more fiscal pothole.
DC motors possess linear relationships that allow for very predictable operation. For instance, if enough voltage is applied across the terminals of a DC motor, the output shaft will spin at a rate proportional to that applied voltage. You can take the ratio of the applied voltage over the rated voltage and multiply that number by the no load speed and get the running speed.
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.
This article is designed to help describe the selection process of a reducer to be used in the parcel handling industry. It will go over the different applications for which gearboxes are used throughout parcel handling facilities such as UPS, FedEx and DHL.
Today, better fuel economy is a main objective in the automotive development process. It remains top-of-mind with the auto industry and consumers because of costs and environmental impacts. Because the industry’s average fuel-economy standard is required to increase by 40 percent by 2020, manufacturers and engineers are working to develop fuel-efficient, environmentally friendly and reliable designs for vehicles.
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).
V-belts look like relatively benign and simple pieces of equipment. They're basically a glorified rubber band, right? Need a replacement? Just measure the top width and circumference, find another belt with the same dimensions, and slap it on the drive. There's only one problem: that approach is about as wrong as you can get.
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.
Is there a gear software package out there that will calculate the design of spur, helical, worm, and planetary gearsets? Also, we would like a program that calculates stresses and material selection. Finally, we would like to have the program calculate bearings loads, too. Thank you for your help.
When rolling element or sleeve bearings operate under extreme conditions, itâ™s more important than ever to follow proper lubrication selection and maintenance procedures to maximize eff ective life and effi cient performance.
For the lubrication of open gear drives used in different industrial applications such as cement and coal mills, rotary furnaces, or where the sealing conditions are difficult, semi-fluid greases are often used in preference to fluid oils. For girth gear applications the greases are used with a splash or spray lubrication system. The selection of such greases influences pitting lifetime and the load-carrying capacity of the gears, as well as wear behavior
Design engineers across industries rely on pillow block bearings for a variety of tough and unconventional applications. Having access to data that backs housing strength performance claims is an integral part of choosing the right bearing to keep operations running optimally. What design considerations must be made when the application demands a pillow block installation on a non-horizontal orientation? What happens when bearing load is not applied through the base of the unit? Timken answers these questions with physical testing, advanced modeling and real-world experience to facilitate the selection of pillow block bearings for specific applications.
First-quarter results are in (bad weather) and summer will prove more interesting than either the market or the fall elections until after Labor Day. But much is happening!
Failure to specify the proper motor for use in a hazardous location can have serious consequences - lost production, extensive property damage, and even loss of human life. Selection of the proper motor requires an understanding of Underwriters Laboratories' (UL) and National Electrical Code (NEC) class, group and division designations and the T code letters.
Synchronous drives are especially well-suited for low-speed, high-torque applications. Their positive driving nature prevents potential slippage associated with V-belt drives, and even allows significantly greater torque carrying capability. Small pitch synchronous drives operating at speeds of 50 ft/min (0.25 m/s) or less are considered to be low-speed. Care should be taken in the drive selection process as stall and peak torques can sometimes be very high. While intermittent peak torques can often be carried by synchronous drives without special considerations, high cyclic peak torque loading should be carefully reviewed.
The demand for stepping motors with high efficiency and low losses has been increasing, although the demand had been previously focused on high torque. Also, the selection of the most suitable grade of lamination for improvement in fastening of the laminated cores has reduced losses significantly at their peak, when compared to conventional stepping motors. Lowering the losses of the motor has enabled continuous operation that was previously impossible. An expansion of the stepping motorâ™s usage into applications where another motor has been used for continuous operation and other usesâ”due to the heat generation problemâ”can now be pursued. In addition, these motors are very effective for energy saving. This paper explains the technology used for lowering the iron losses of the stepping motor.
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.
Rolling element or sleeve bearings often are required to operate under extreme conditions. In these instances, it is more important than ever to follow proper lubrication selection and maintenance procedures to maximize effective life and efficient performance.
The primary driver of an airport baggage handling queue conveyor must be able to operate under increasingly demanding operating conditions, including frequent starting and stopping. The selection of the primary driver of the queue conveyor is dependent on multiple criteria, including dimensional requirements and durability characteristics.
The demand for stepping motors with high efficiency and low losses has been increasing right along with the existing focus on high torque. The selection of the most suitable grade and improvement in the fastening of the laminated cores has reduced losses significantly at their peak when compared to conventional stepping motors.
Waukesha Bearings is known internationally for its capabilities, technology, size and application experience in the rotating (turbo) equipment industry. Following is a brief selection guide intended to assist engineers, specifiers, integrators and others in choosing the right bearingâ”and bearing technologyâ”for the application.
In most cases, industrial power transmission calls for flexible rather than rigid couplings in order to forgive minor shaft misalignment. For that reason, this article will focus solely on the selection of flexible couplings.
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.
News Items About election
1 Cone Drive Launches Selection Program (January 25, 2012)
Cone Drive Gearing Solutions has recently launched a new online servo gear head selection program-AccuMate. With AccuMate, engineering pr...
2 Motion System Software Simplifies Drive Selection (May 5, 2010)
The Motioneering 6.1.0 motion system sizing and selection software from Kollmorgen is an OEM design tool that uses a mechanism project co...
3 Danaher Motion Introduces Web-Based Sizing and Selection Tool (August 14, 2007)
Danaher Motion introduces Linear MOTIONEERING®, a powerful web-based linear motion system sizing and selection tool that enables OEM ...
4 TB Wood's Offers Belted Drive Online Selection Tool (September 2, 2016)
TB Wood’s has recently introduced more enhancements to their popular online Belted Drive Selection Program at the website below. Th...
5 SKF Develops Online Heater Selection Tool for Bearings (June 14, 2016)
The new SKF online heater selection tool introduces an easy, convenient and highly accessible resource to make the right pick among heate...
6 Baldor Introduces Passport Selection Tool (October 10, 2016)
Baldor Electric Company introduces Passport, a new selection program for Baldor-Dodge mechanical power transmission products. Passport is...
7 Steinmeyer Offers a Selection of Miniature Ball Screws (December 14, 2017)
Steinmeyer recently announced a new program to stock a selection of miniature ball screws. The samples are available now for immediate sh...
8 KISSsoft Offers Selection of Predefined Gear Stages (November 16, 2017)
KISSsoft Release 03/2017 has a new function, the "Groups box", which lists a selection of predefined gear stages. These gear st...
9 Lufkin Announces Election of John F. Glick as president (October 31, 2007)
The board of directors at Lufkin Industries Inc. has elected John (Jay) F. Glick as president of the company. Glick has been a senior off...
10 LM76 Offers Bearings Selection Guide for OEMs and Maintenance Professionals (October 11, 2017)
Food processing and beverage washdown areas are unique environments that undergo harsh treatment from high pressure washers, steam, and a...
11 Huco Examines Flexible Coupling Selection (March 28, 2013)
Flexible shaft couplings connect two shafts, end to end. They transmit rotation from one to the other and accommodate the slight, unin...
12 Regal Releases New Product Selection Tool on Website (September 26, 2018)
Regal Beloit Corporation, a manufacturer of electric motors, electrical motion controls, power generation and power transmission componen...
13 Brother Gearmotors Expands Selection of High Torque Mid-Series Gearmotors (March 12, 2015)
Brother Gearmotors, a division of Brother International Corporation that offers sub-fractional AC gearmotors and reducers for the food an...
14 Nexen Introduces Precision Motion Control Application & Selection Guide (January 27, 2015)
Nexen Group, Inc., a manufacturer of precision motion control solutions, recently introduced its latest Precision Motion Control Applicat...