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Accurate Linear Movement Demands Slide Bushings
Hardened and ground balls, submerging balls, hardened and ground levitator for exposed ball height are all parts within a slide bushing. Read up on the fundamentals and view cutaways at this Engineering Fundamentals Design Guidelines for punch die presses, molds, and other tooling applications.
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Bearings Conquer Constant Conditions
Mining equipment operates around the clock, but bearings made of various alloys keep equipment running. What are the keys to designing bearings for heavy equipment, what materials best match conditions, and what helps these vital mechanical components keep running smoothly however severe the conditions? Read this Machine Design article.
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The Theory Behind Seal Design
Static and dynamic seal gland design, considerations in incompressibility, viscoelasticity, and thermomechanical aspects, elastomers in plasma environments and in vacuum environments (including permeation, outgassing, and trapped gas) — are all part of this PSP, Inc. tutorial on Seal Design Theory. Review the three models for characterizing viscoelastic behavior as well.
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Failures Enable Engineering Success
Often by studying our engineering failures, we can learn new lessons and create even better products. Most failures involved a lack of design/implementation checks and a desire to save time and/or cost. The Engineer's Companion FAQ on Failures reviews famous examples of engineering failures, avoiding failures, and what to do when a failure happens.
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Sandvik Materials Technology
A Leader in Design and Manufacturing
Custom-engineered power springs, reels, assemblies, and specialized tooling, with over 60 years experience creating products meeting demanding specs and requirements. Experience, plus unmatched engineering know-how, means we can respond quickly to customer needs with quality solutions, from design to production and on-time delivery.
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Boca Bearing Company
Grease, Oil, and Fuel Additives
Improve your bearing's performance. Our Midas Touch line of bearing lubricants form a microscopically smooth molecular bond that permanently adheres to the entire contact area. It also fills in surface imperfections, pits, gaps, and even repairs the ravages of corrosion. All Boca Bearing lubricants come with a 30-day, money back guarantee.
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Century Spring offers a PDF file that explains how to determine how many active coils a spring should have, what's a safe design stress for a compression spring, what are the best materials for corrosion and other known conditions, and how to calculate rate/loads for disc spring stacks among other topics.
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Split Lock Washer Dimension Chart
What's the difference between the inside/outside diameters of a No. 2 and a No. 12 spring washer? Does a .875 or a .8125 washer have more thickness? Engineer's Edge offers this helpful Split Lock Washer Size Dimension chart that you'll want to bookmark. Also covered are other hardware types and fastener and screw/bolt design.
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Identifying Screw Threads
Who knew there were so many ways to identify screw threads — thread form, thread pitch, head of thread, major and minor diameters, pitch diameter, and number of starts? If you thought the only distinguishing features of screws were right-hand or left-hand threads, you'll want to check out this replacement part identification help.
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Annular Calculator is a Snap
Dean Lewis at Rensselaer Polytechnic Institute has developed an online annular snap calculator that allows engineers to select their choice of materials, units, and parameters, including two types of shaft and hub. The calculator can also review the calculated results and view a scaled drawing.
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Macro Sensors, A Division of Howard A. Schaevitz Technologies
Position Sensor 24 VDC Pre-Calibrated 0-10 VDC
Pre-calibrated DC-LVDT's. Position Sensor applications in automated machinery and OEM applications. We offer a complete line of controllers and indicators for ease of setup and use. Call us for your tough applications. Robust custom engineered designs for extreme environments like high heat, high pressure, and subsea. More information...
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Orttech, Inc.
Linear Brake
The Ortlinghaus linear brake system can support or, as the case may be, reinforce the holding force of the linear motor or — in situations where the power is off — undertake the holding function whereby the holding position that has been taken up is maintained in a backlash-free manner. For further information please contact Orttech.
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Dice
A Better Job Search by Design
DiceEngineering.com offers thousands of quality engineering jobs at top technology and engineering companies. Find jobs in your area of expertise. Search now.
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Creative Sr. Mechanical Engineer
Cardinal Health is looking for a senior mechanical engineer for the department of Clinical Technologies and Services. You will be responsible for the design of new products as well as modifications and updates for an existing line of medication and medical supply equipment. Full position details can be found here.
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Engineering Design Teaching Library
From class notes and full texts (in PDF format) for several Design Methods classes, to Cool Designs, to a list of useful software tools to download, engineers can refresh their skills or learn new ones without ever stepping into a classroom. Check out the links for sources on designing better products.
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The Physics of Play Parks
When visiting that amusement park this summer, the engineer just might wonder about how those rides really work. What keeps that roller coaster safely on the track while flying around curves at 60 mph or faster? Or how about those loops, and the bumper cars? Ready to ride? Read this Glossary of Park Physics.
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Still Have Your First HP Calculator?
Remember the HP-35, the first slide rule pocket calculator or the HP-29C high-end programmable calculator? The first HP calculators hit the streets in 1968, and engineers fell in love with them. This HP museum site has a calculator timeline, collecting information, manuals on CD, and a software library.
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Complimentary Subscription to Desktop Engineering Magazine

Desktop Engineering covers design solutions from concept through manufacture. Each issue offers extensive product reviews, comparisons, tutorials, technology updates, application stories, and product resource guides. Get your complimentary subscription here.
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