Reference Articles 1 - 100 of 473
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Superbolt Tensioners Used on Cern Hadron Collider
As part of the U.S. contribution for the CERN Hadron Super Collider, Superbolt® was chosen to supply over 1,500 high-strength mechanical tensioners, expansion bolts and Torquebolts®. This...(read more)
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Optimizing Airborne Platforms to Support Wireless-in-the-sky Applications.
An Overview of the Opportunities, Challenges & Solutions. For Deploying Web Access, Multicast In-flight Entertainment And Other Wi-Fi Services On-Board Commercial Aircraft....(read more)
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An Overview of Bearing Types and Glossary of Engineering Terms (.pdf)
This document goes over the different types of rolling bearing types....(read more)
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Barden Company Engineering Data for Super Precision Bearings (.pdf)
After a bearing selection has been made, the product or system designer should pay careful attention to details of bearing mounting and fitting....(read more)
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Comparison of the Load Carrying Ability of Different Types of Bearings (.pdf)
The table compares the performance of different bearing types with regard to load, accuracy, noise and friction....(read more)
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Case Study: Medical Device Manufacturer Saves Time and Money with Shipping Cases
A Dental company saves time and money with ATA-300 shipping cases: A Dental company spent thousands of dollars and consumed costly union hours at the numerous tradeshows on their schedule. Their...(read more)
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What is an ATA-300 Category I Shipping Case?
ATA-300 (Category I) is a list of specifications for reusable shipping cases and containers put forth by the Air Transport Association. Category I containers are built to withstand at least 100 one...(read more)
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Cage Creep
Most manufacturers in the ball slide and cross-roller slide industry refer to cage creep as the phenomenon in which there are two parallel cages containing ball or cross-roller bearings and during...(read more)
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What is ATA-300 (Category I) for Shipping Cases and Containers
ATA-300 (Category I) is a list of specifications for reusable shipping containers put forth by the Air Transport Association. Category I containers are built to withstand at least 100 one way trips of...(read more)
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Glass - to-Metal Sealing
The functionality of glass-to-metal seals is to provide a way to hermetically isolate an electrical conductor from one environment to another. In addition to providing the seal, the glass acts as an...(read more)
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Environment Rules Joint Design (.pdf)
Blind rivet nuts first appeared on airplanes in the mid 1930's. OEMs and equipment builders in the aerospace and military markets used them for airplane wing attachment in locations that limited...(read more)
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Understand, Maintain and Service Your Torque Wrench
In the maintenance and manufacturing world, tightening, controlling, or measuring torque of fasteners is imperative for production efficiency and quality control. With inadequate torque a fastener can...(read more)
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Linear Solenoid Design Guide
Solenoids convert electrical energy into force and motion. When the coil is energized with electric current an electro-magnetic force is created around the coil. Enclosed solenoids such as the Lisk...(read more)
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The Lowdown On Lubricants For Rolling Bearings
Grease or oil for rolling bearing lubrication helps smooth the way toward reliable performance by preventing metal-to-metal contact between a bearing's rolling elements, raceways and cages. Besides...(read more)
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Hinge Design Guidelines
Keep these factors in mind for optimal performance at an economical cost: Select a standard product from our catalog. We have over 600 in-stock items from which to choose. For most items (up to .074...(read more)
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Tips for Setting up Air Line for Pneumatic Assembly Tools
For pneumatic assembly tools to operate properly and efficiently, it's key to provide a clean, dry flow of air to the tool. Air tools are adversely affected by moisture. Since air from a compressor...(read more)
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Vibration & Shock Isolation: Complex Driving Forces (.pdf)
When the disturbing forces are neither sinusoidal nor suddenly applied, the vibration analysis becomes more complicated. While it is more difficult to give general guidelines or methods of analysis,...(read more)
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Vibration Isolators: Design Problem Examples (.pdf)
The following are a number of problems intended to familiarize the reader with the basic applications of vibration isolators. More advanced techniques which would result in stiffer isolators while...(read more)
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Plastic Electrical Enclosures - Solutions for Extreme Customization (.pdf)
Standard enclosures do not remain standard for long. In no time, engineers put holes, cutouts, and recesses into pristine boxes. This process is necessary to make the enclosures functional. There are...(read more)
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Understanding an ASTM D 2000 Call Out (.pdf)
An ASTM D 2000 "call out" may look like a chaotic alphanumeric code, but it can be simplified and broken down into manageable pieces. At the basic level, ASTM D 2000 identifies rubber products based...(read more)
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Reasons for Choosing a Diaphragm Seal for Pressure Applications (.pdf)
In many pressure applications, it is necessary to isolate the sensing element from the material being sensed. The components used for the sensing element can be damaged or in other ways rendered...(read more)
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Test Data for Kellett Enterprises Closed Cell Foam 3/8 (.pdf)
Procedure: Two specimens were prepared from the submitted sample by mounting a 2"x2" section on a steel plate. Each specimen was pulled at 6 in/min. across a section of tile provided by the customer....(read more)
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Test Data for Kellett Enterprises LP-13 Lite Vibration Isolation 1/4 (.pdf)
Procedure: Each specimen was stabilized at test temperature for at least 24 hours prior to being mounted on the MTS machine for testing. The actuator was positioned, the load and displacement were...(read more)
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Test Data for Kellett Enterprises LP-13 Vibration Isolation 3/8 (.pdf)
Procedure: Each specimen was stabilized at test temperature for at least 24 hours prior to being mounted on the MTS machine for testing. The actuator was positioned, the load and displacement were...(read more)
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Take the Wheel: Exploring the possibilities of Guide Wheels Systems (.pdf)
After more than 40 years of use in thousands of applications ranging from the saw mill to the clean room, and from light to heavy loads, guide wheels have proven features that meet performance,...(read more)
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How to Handle a 37,000 Pound Vibration Problem (.pdf)
New Zealand based Transfield Worley engineering and construction company recently approached Kellett Enterprises with a heavy vibration problem, really heavy. But like all of Kellett's customers over...(read more)
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Vital Hospital Computers Protected by Kellett Enterprises (.pdf)
When one of Kellett Enterprises' latest customers prepared for a 110,000 square foot addition to their hospital, they faced significant vibration issues that could have potentially impacted the...(read more)
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Designing Enclosures to Fit PCB's (.pdf)
Many electrical designers are familiar with the principles of designing and procuring printed circut boards (PCB's) But what about designing the enclosure that perfectly accommodates those printed...(read more)
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L-SHAPE or U-SHAPE - When and Why to Choose One Style Over the Other (.pdf)
Are you wondering how to design an enclosure which has DB connectors protruding from two sides? More importantly, what would you do if the DB connectors are protruding from opposite sides?...(read more)
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Vibration Pads for Commercial Bakery Equipment (.pdf)
When commercial baking equipment reseller, Production Line Equipment, added Kellett Enterprises,' LP-13 Shake Absorber® Vibration Pad, to their product line up, we wanted to spread the word like...(read more)
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Load Points in Compression Springs (.pdf)
Load points should be specified between 15% and 85% of the possible deflection in a compression spring. Load points outside of these ranges are typically inconsistent with expected/calculated values....(read more)
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Mexicana Rolls Out Oracle Package
Implementing a big information technology project is akin to having a baby--while you eagerly await its arrival, not everything goes as perfectly as you planned, according to Ruben Arguero, VP of the...(read more)
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What is "Corrected Stress"?
Stress calculations found in nearly all spring design handbooks are based on bar-in-torsion theory...(read more)
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Every Millimeter Counts:Right-Sizing for Instrument Cases (.pdf)
Space is a premium in the markets for instrument cases. Whether it's a lab,hospital, industrial setting, or on a naval ship, instruments need to be smaller and smaller. In designing instrument cases,...(read more)
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Gantry Machining of Carbon Fiber Reinforced Plastic
An aerospace company needed a gantry machine capable of high-speed machining of carbon fiber reinforced plastic (CFRP) used on aircraft wings and fuselage. It was critical that the machining process...(read more)
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Improving Energy Efficiency through Lubrication
Can lubricants improve gearbox efficiencies? This paper will explore how oil selection can affect gearbox efficiency....(read more)
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The Basics of Enclosure Design (.pdf)
Whether you design your enclosure from scratch or make use of one of our simple template based design, knowing the basics of enclosure design will make your work easier. Covering metal...(read more)
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This Changes Everything! (.pdf)
Describes a patented new approach to machinery condition, bearing fault analysis which provides key information on rotating machine condition directly. Anyone can use it with no expensive training. It...(read more)
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The Mechanics of Nonlinear Systems with Internal Resonances
The Mechanics of Nonlinear Systems with Internal Resonances Written for researchers, graduate and post-graduate students interested in nonlinear systems, this book is devoted to internal...(read more)
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ADS-B Enters U.S. Air Traffic Management Arena
The FAA is about to enter a critical phase in its transition to satellite-based airspace management, with the debut of a system that will for the first time allow controllers to separate traffic at...(read more)
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Techical Reference: COMPARISON GRAPHS for Timming Belts and Pulleys
In order to provide comparison of performances of different pitch drives, several graphs have been developed....(read more)
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Technical Reference: Considerations and Measuring Gear Teeth CONTACT RATIO
To assure continuous smooth tooth action, as one pair of teeth ceases action a succeeding pair of teeth must already have come into engagement. It is desirable to have as much overlap...(read more)
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Technical Reference: Double-Sided Twin Power Belt Drives Considerations
Timing belts are also available in double-sided designs, which offer an infinite number of new design possibilities on computer equipment, business machines, office equipment, textile machines and...(read more)
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Technical Reference: DRIVE RATIO TABLES
In the design of belt drives, we usually know the speed ratio (transmission ratio) and we need to determine pulley sizes, center distance and belt length. These quantities are shown in Figure 39, for...(read more)
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Technical Reference: GEAR ACCURACY Considerations
Database Product Finder T-131 SECTION 15 GEAR ACCURACY Gears are one of the basic elements used to transmit power and position. As designers, we desire them to meet various demands:...(read more)
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Technical Reference: HELICAL GEARS
The helical gear differs from the spur gear in that its teeth are twisted along a helical path in the axial direction. It resembles the spur gear in the plane of rotation, but in the axial direction...(read more)
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Technical Reference: IDLER USAGE Discussion
Idlers in synchronous belt drives are commonly used to take up belt slack, apply installation tension or to clear obstructions within a system....(read more)
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Technical Reference: LUBRICATION OF GEARS - Considerations
The purpose of lubricating gears is as follows: 2. Limit the temperature rise caused by rolling and sliding friction. To avoid difficulties such as tooth wear and premature failure, the correct...(read more)
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The Power to Fly: An Engineer's Life
The Power to Fly: An Engineer's Life In this gripping memoir, the author reveals unpublished details about the thinking behind major GE products, including the F404 engines that power the U.S....(read more)
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Value-at-Risk: Theory and Practice
Value-at-Risk: Theory and Practice Value-at-risk (VaR) is a measure of market risk that has been widely adopted since the mid-1990s for use on trading floors. This takes readers from the basics of...(read more)
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Flight Catering, Second Edition
Flight Catering, Second Edition Fully endorsed by the International Flight Catering Association, this authoritative guide takes the reader through every aspect of in-flight catering including...(read more)
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Geotourism: Sustainability, Impacts and Management
Geotourism: Sustainability, Impacts and Management Using a wealth of case studies, this unique text discusses the issues involved in the management and care of geological attractions, covering...(read more)
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Key Considerations for Energy Efficient Design
Energy efficiency and power quality standards are driving the use of solutions, such as, PFC technology and creative magnetic component designs. Examples include the European Distortion Requirements,...(read more)
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Key Considerations for PFC Conductors
PFC (Power Factor Correction) inductors are used in active boost circuits to correct harmonic current distortion in AC to DC converters. The goal is to achieve a Power Factor (PF) as close to 1.0 are...(read more)
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Development of a New High Performance Material to Improve Vehicle Efficiency by Reducing Frictional and Parasitic Energy Losses in Transmission Components (.pdf)
Emission regulations, fuel conservation and green-house gas reduction have made vehicle efficiency a driving force in driveline and transmission design. Literature and customer interviews have...(read more)
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Seal Eccentricity (.pdf)
The two major elements of eccentricity that should be considered when designing a seal: Shaft-to-Bore Misalignment(STBM) and Dynamic-Runout(DRO)....(read more)
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Tips for Tougher Molded Plastic Gears
Plastics are quickly becoming a contender for some power gearing applications, and the lessons learned in development will apply to other engineering design challenges....(read more)
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Design-Oriented Analysis of Structures: A Unified Approach
Design-Oriented Analysis of Structures: A Unified Approach Demonstrating many illustrative examples and numerical results, this book deals with problems of multiple repeated analyses (reanalysis)...(read more)
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A Better Belt Drive
If you think belt drives have too much slop for your precision linear motion applications, think again. Bell-Everman Inc., a specialist in high-accuracy motion systems, has come up with a new kind of...(read more)
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Limit Analysis & Soil Plasticity
Limit Analysis & Soil Plasticity Devoted to the theory and applications of limit analysis as applied to soil mechanics, this text also contains information on soil plasticity and rock-like...(read more)
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Earth Anchors
Earth Anchors Summarizing most of the theoretical and experimental works directed toward the ultimate and allowable holding capacity of earth anchors, this book discusses horizontal, vertical and...(read more)
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Seals and Sealing Handbook, Fifth Edition
Seals and Sealing Handbook, Fifth Edition An introduction to the subject of sealing technology, this book provides an understanding of the issues involved and sufficient information to assist with...(read more)
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The System Designer's Guide to VHDL-AMS: Analog, Mixed-Signal, and Mixed-Technology Modeling
The System Designer's Guide to VHDL-AMS: Analog, Mixed-Signal, and Mixed-Technology Modeling This comprehensive manual explains how to use VHDL-AMS to write a hardware design, which you can then...(read more)
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Theoretical Foundation Engineering
Theoretical Foundation Engineering Featuring an easy-to-understand format where detailed mathematical treatment is kept to a minimum, this in-depth book provides numerous charts, drawings, and...(read more)
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Flexible Couplings: APPLICATION CONSIDERATIONS
Flexible couplings are designed to accommodate various types of load conditions. No one type of coupling can provide the universal solution to all coupling problems; hence many designs are available,...(read more)
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GENERAL CLASSIFICATION OF COUPLINGS AND THEIR PERFORMANCE CHARACTERISTICS
Typical rigid couplings shown usuallycomprises a sleeve fitting snugly on the con- nected shafts and positively connected with each shaft by pins......(read more)
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Thermal Protection of Electrical Enclosures
Thermal testing has proven that natural convection cooling is not adequate for today's smaller, high power density enclosures. Heat dissipation by forced convection (fan cooling) is the most...(read more)
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Analysis of Volatile Organic Compounds in Soil Samples by EPA Method 8260 with The Stratum PTC and Solatek 72 Multimatrix Autosampler (.pdf)
Purge and Trap concentration (P&T) along with Gas Chromatographic (GC) analysis is a widely used method for the analysis of Volatile Organic Compounds (VOCs). This methodology was developed to achieve...(read more)
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Ball Valve Bolting Solution Saves Company Millions
A major utility approached Superbolt about using their Multi-Jackbolt Tensioners to reduce down-time on their large Ball Valve. Previously they used a hydraulic bolting method. The estiamted time...(read more)
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Positioning Solar Dishes (.pdf)
Renewable energy is one of the hottest topics today, and one of the main priorities of the country. That's why Stirling Energy Systems, Inc. of Phoenix recently signed an agreement to construct a...(read more)
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Optical Level Switch Selection and Wiring Notes (.pdf)
The optical liquid level sensors incorporate a phototransistor trigger, which provides a digital output that denotes the presence or absence of liquid. The mode of operation is derived from the...(read more)
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Switch Reliability From a Practical Point of View
Customers and manufacturers are equally concerned with product reliability, as it has a direct bearing on the end productâ s performance in the hands of its users. The electronics industryâ s standard...(read more)
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Underground Mining Bolting Application: Crusher Drum Bits
Superbolt Multi-Jackbolt Tensioners solve bolting problems on various critical underground mining applications. This article details one such application: Crusher Drum Bits....(read more)
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Wiring Diagrams for Madison Controllers and Annunciators (.pdf)
These wiring diagrams are provided to aid the user in wiring the Madison products to these controllers and annunciators. Under each diagram you will find a Madison base part number. These numbers were...(read more)
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Too Loose or Too Tight? 10 Steps to Torque Control
Ten tips for achieving precision torque control will give OEMs vital information needed to streamline their production processes...(read more)
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Air France-KLM In Detailed Talks with Alitalia
Air France faces several weeks of difficult negotiations with Alitalia as it tries to devise a politically palatable way to assume control of the struggling Italian airline. But those near-term...(read more)
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Airbus Plans Long-Term Presence in China, Starting with Tianjin
Airbus is stepping up its efforts to become a major player in the Chinese aerospace sector with the opening of its final assembly line for the A319 and A320 in Tianjin. Late last month, the Airbus...(read more)
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Airbus, Avic Near Deal on Harbin Composites Plant
Airbus is close to an agreement with Avic's Harbin Aircraft to set up a joint composite-components plant in China, in an early test of the European company's policy of avoiding cooperation that...(read more)
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Avantair Posts Loss Despite Leap In Sales
Clearwater, Fla.-based Avantair continued to expand its business of selling fractional shares in the Piaggio Avanti P.180 pusher prop, reporting a 52.9 percent increase in revenues for the company's...(read more)
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Strikes May Harm Airbus' 2007 Delivery Targets
Airbus is at risk of missing 2007 aircraft deliveries if strikes at production facilities mainly in Germany and France continue. So far, the strike actions in response to threatened job cuts haven't...(read more)
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Bearing Failure Detection (.pdf)
The paper is a primer on aspects of rolling element bearing monitoring and failure detection. Its content is derived from a variety of sources and is meant as an informational piece only. No...(read more)
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Learn New Approach to Bearing Fault Detection (.pdf)
The useful operating life of a rolling element bearing is influenced by a number of factors. Some are controlled by the designer, others are controlled by the user. BearingLifeGuard ® is a...(read more)
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Lubrication 101
In a study conducted by a major component manufacturer, it was determined that over 50% of bearing failures were the result of improper lubrication. Inadequate lubrication and bearing contamination...(read more)
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Testing for Leaks
There are many methods of testing for leaks in enclosures. The more commonly used methods along with the range of accuracy provided are listed below:...(read more)
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How Green is Your Gearbox? (.pdf)
Rising energy costs and concerns about global warming are at the forefront of today's news. Turn to local or national TV programming, browse the internet or read the paper and one can find numerous...(read more)
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Measuring Bearing Vibration (.pdf)
This presentation describes things to know when trying to measure bearing vibration....(read more)
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Vibration Pads for Weaving Machines in Textile Industry (.pdf)
Even the best machines and equipment can fall victim to the problems that come with excessive vibration and noise. That's because, over time, vibration causes significant problems in the areas of...(read more)
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Vibration Pads used on HVAC Heat Pumps For A New Multi-Use Condo (.pdf)
Imagine coming home to your new downtown luxury condominium, ready to unwind from a hectic day, only to hear and feel distant vibrations seemingly coming from the rooftop. This was the recent scenario...(read more)
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Is DNP3 the Ideal HMI/SCADA Protocol?
For electric and other utilities in North America and much of the rest of the world, DNP3 is the dominant Human-Machine Interface HMI/SCADA protocol. It has a rich set of features and a...(read more)
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Plastic Gear Terminology
Delrin (Acetal): a lightweight, durable, low wear, low friction, heat resistant plastic. That is excellent for either low quantity machined gears or high quantity injection molded gears....(read more)
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Worm Gears
Worm gears are right angle devices providing large speed ratios on a comparatively short center distance. Worm and worm gears operate on non-intersecting shafts at 90 degree angles....(read more)
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Spur Gear Terms
Spur gears have straight cut teeth. They are designed to operate on parallel shafts to transmit motion and power. Change gears are primarily used in machinery where gear ratios are frequently changed....(read more)
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Techical Article: Timing Belt Drives
Timing belts and pulleys offer a positive drive through the engagement of molded teeth in the belt with accurately spaced grooves on the pulley. The action of belt teeth entering and leaving the...(read more)
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Variable Speed Drives and Centrifuges for Zone 1 Hazardous Areas (.pdf)
Using a variable frequency drive (VFD) provides a standard solution to get the top performance of machines in many applications in the process industry. Today, there is no solution to install...(read more)
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Beware Thermal Cycling in Bioprocessing - Part 1(.pdf)
Valves and fittings account for the largest number of seals used in any bioprocessing system. In an individual processing suite, the seals that make up sanitary connections to tanks and vessels, valve...(read more)
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Thread Galling - What is it? How to Avoid it.
"Galling" or seizing of fasteners. This occurs when the surfaces of the mating parts are very abrasive. Galling occurs only on metallic fasteners, and is more likely to occur when the external threads...(read more)
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Active Coils in a Spring
The active coils are what make a spring a spring. We normally refer to the coils that open in an extension spring, the coils that deflect or close in a compression spring and the coils that twist or...(read more)
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Bearing Failure Analysis: Operating Conditions Typically Hold the Key
Rolling element bearings are highly reliable components, and the vast majority of bearings will outlive the equipment on which they are installed. However, while bearings account for a relatively...(read more)
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Bearing Failures - Causes and Cures: Proper Storage and Handling
Rolling-element bearings are highly precise components with internal tolerances on the order of millionths of an inch. So they should be handled carefully to ensure that they perform as expected. The...(read more)
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Calculating Pressure and Velocity limits in Bearings (.pdf)
PV (Pressure & Velocity) is the most common empirical tool to use when comparing and contrasting bearing performance. "P" is related to pressure or pounds per square inch on the projected bearing...(read more)
