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Fastener Design And Use

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  • The 'Friction Flaw' with Fastener Torque Settings Charts
    be an acceptable practice, especially when proper installation and maintenance of design tension is critical for safety concerns or when joint failures can result in costly down times. The BEST way to accurately determine tension in a bolted joint is by measuring actual fastener elongation under load. In other
  • Understanding the Nut Factor in Threaded-Fastener Torque-Tension Relationship
    on threaded-fastener systems. * A nut factor determined for one fastener geometry is valid for fasteners of similar geometry but different diameters. * Testing joint prototypes highlights fastener interactions and points out design flaws. ," MACHINE DESIGN, April 1, 2005 MACHINE DESIGN, August 23
  • Proper Fastener Selection and Application are Key to Bolted Joints That Won't Loosen or Lose Clamping Force
    New Criteria of Self-Loosening of Fasteners Under Vibration, Gerhard H. Junker, SAE Paper No. 69005 1969 Loosening of Fasteners by Vibration, R. C. Baubles, G.J. McCormick, C.C. Faromi, 1996 An Introduction to the Design and Behavior of Bolted Joints, Threaded-fastener technology has been around
  • Innovative Fastener Thread Form Can Take the Heat and Vibration of Diesel Engines
    process, joint fasteners may have to withstand exhaust gases up to 1300º F, components to 1000º F, and continuous vibration over thousandths of an inch, with a force of acceleration up to six times that of gravity," said Todd Werner, a design engineer for Allentown, Pennsylvania-based Mack Trucks
  • Aerospace Industry Turns to Innovative Fastener Thread to Keep the Mission from Falling Apart
    reusability and ongoing resistance to thermal expansion and contraction are necessary. The heart of the problem is the 60° "vee" thread design of traditional fasteners, which is prone to self-loosening rotational movement in high load and vibration aerospace applications.
  • Lead Screw Technology Rolls Over Ball Screws (.pdf)
    Lead screws were once believed to be a cheap substitute for ball screws, to be used in less demanding applications. They were often assembled using low quality screws from ball screws or fastener designs, where a simple, one-piece nut provided basic power transmission and rotary-to-linear motion
  • Leadscrews roll over ball screws
    Leadscrew technology has made vast strides. Now, leadscrews offer higher performance at lower cost. Leadscrews were once considered a cheap substitute for ball screws to be used mostly in less demanding applications. They were often assembled using low-quality ball-screw or fastener designs, where
  • Quick-operating Fasteners
    design and operation can also be important. For example, a quick-release fastener with a Phillips recess offers fast access only if an operator has the required screwdriver. Quick-operating fastener types include lever-actuated, turn-operated, slide-action, push-pull, lift-and-turn, magnetic

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