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  • Shear Strengths of Representative Bayer MaterialScience Thermoplastics (.pdf)
    estimate (rule of three) of the shear strengths. designing cutting and punching tools, rivet-type. of related products whose shear strength has not. connections (bolts, pins, screws, hybrid technique). been measured. The yield stress respectively the. and welded joints. stress at break at 80 °C have
  • Failure Analysis: Excessive Tensile Loading Can Result in Necking, Thread Spreading and Ductile Overload Failure
    States. Two fractured hex-head, 5/16 " x 24; UNF-2 Bolts were submitted for metallurgical failure analysis along with one "New " bolt for comparison. The fractured bolts were labeled as Samples A and B. The new bolt measured 1.450 " in total length with approximately 1 " long threaded section
  • Fastener Failure Analysis: Preventable Fatigue Failure
    . Both sets of bolts exhibited similar hardness values. Tensile strength results were similar for one of the old-style bolts and one of the fractured bolts. However, another fractured bolt did not meet minimum tensile strength requirements for SAE Grade 5. There is no evidence that this affected
  • Failure Analysis: Oil Field Case Study
    in the transverse orientation along the thread root edges with final separation by ductile and shear overload on the remaining material. See Figure 2. Bolt A was further examined as the representative sample since all bolts exhibited similar features. A strong detergent was used to clean the fracture
  • Four Things Engineers Must Know About Locking Fasteners to Keep Their Products and Careers in the Fast Lane
    also. The wedge ramp allows the bolt to spin freely. prove costly and tedious to use on components with. relative to female threads until clamp load is applied. multiple bolts. If not properly fastened during assem-. The crests of the standard male thread form are then. bly, maintenance or rebuilds
  • Mounting Sprockets and Pulleys on Pilot Style Clutches - Considerations & Guidelines (.pdf)
     engagement and the threads may shear . under load.  It is recommended that bolts be of sufficient length to . utilize the full extent of the threads provided by the clutch . manufacturer without exceeding the length of the hole. .  .  . Figure 5B:  Inadequate Thread Engagement
  • Using Titanium, Zirconium and Nickel Alloy Threaded Fasteners (.pdf)
    together. We multiply that load by a safety factor and divide by the number of bolts that. seems appropriate for the joint. The result is the load carrying capacity required of each bolt in the. assembly. If that number is divided by eighty per cent of the yield strength of the fastener material. chosen
  • Making the Case for Tension Indicating Fasteners
    control”. ½ -13x4 Grade 5 bolts retrofitted with. bolts – head is designed to shear off. a direct tension indicator designed to. at a specified torque. visually indicate a specified tension. Initial cost per bolt: $3 each. Initial cost per bolt: $12 each. Total of 300 bolts = $900. Total of 300
  • Glossary of Caster Terminology
    Below is a list of common caster terms and their definitions to help you understand the common parts of a caster as well as key terms used in the industry. A bolt that is placed through the bearing and attaches a wheel to the Forks of a Caster. Some axles have Zerk grease fittings on them to allow
  • New Test Data Offers Resolution for Toughest Engineering Challenges
    vibration,. pull the bolts in tension and calibrate the strain in the. the ability of the inserts to assist in resisting vibration. bolt for a given load. Static tests were performed to. was clear. All 20 Spiralock results consistently gave a. measure gapping and to determine the friction con-. 15%

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