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  2. Multi-jackbolt tensioner - Wikipedia

    en.wikipedia.org/wiki/Multi-jackbolt_tensioner

    Multi-jackbolt tensioners (MJTs), registered under the trademark Superbolt or Supernut, are designed to decrease the torque required to tighten large bolted joints. One of the major problems associated with traditional bolt tightening methods is as the diameter of the bolt increases, the amount of torque required to tighten it increases in the third power of the diameter. [1]

  3. Preload control - Wikipedia

    en.wikipedia.org/wiki/Preload_control

    torque-angle tightening (also known as torque-angle tension control) is a method of securing the bolted joint when the initial tension is critical for reliability and safety. The technique relies on simultaneous monitoring of both the torque applied during the tightening as well as the angle of rotation, usually using a torque/angle wrench.

  4. Hydraulic torque wrench - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_torque_wrench

    Hydraulic torque wrenches typically offer accuracy of ±1-3% and have a high degree of repeatability making them well suited to applications where large bolts are involved and a high degree of accuracy is required. [3] A hydraulic torque wrench is significantly quieter, lighter weight and more accurate than pneumatic impact wrenches capable of ...

  5. Bolted joint - Wikipedia

    en.wikipedia.org/wiki/Bolted_joint

    The applied torque causes the bolt to "climb" the thread causing a tensioning of the bolt and an equivalent compression in the components being fastened by the bolt. The preload developed in a bolt is due to the applied torque and is a function of the bolt diameter, the geometry of the threads, and the coefficients of friction that exist in the ...

  6. Torque wrench - Wikipedia

    en.wikipedia.org/wiki/Torque_wrench

    A click torque wrench. A torque wrench is a tool used to apply a specific torque to a fastener such as a nut, bolt, or lag screw.It is usually in the form of a socket wrench with an indicating scale, or an internal mechanism which will indicate (as by 'clicking', a specific movement of the tool handle in relation to the tool head) when a specified (adjustable) torque value has been reached ...

  7. Direct tension indicator - Wikipedia

    en.wikipedia.org/wiki/Direct_tension_indicator

    The number of instances the bolt shank can be reached by the feeler gage is then compared to either the results of a pre-installation verification procedure or the manufacturer's instructions. Applied Bolting Technology Products, LLC manufactures self-indicating DTIs, which are a subset of the standard DTIs described above.

  8. Family's anger as father's killer goes on the run again - AOL

    www.aol.com/familys-anger-fathers-killer-goes...

    The family of a man who was murdered in Londonderry have said they have been "failed by the justice system" after his killer went on the run from prison again.

  9. John Deere Gator - Wikipedia

    en.wikipedia.org/wiki/John_Deere_Gator

    A John Deere Gator converted into an ambulance: This vehicle is owned by Toronto District St. John Ambulance. The John Deere Gator is a family of small all-terrain utility vehicles produced by the John Deere Corporation. Gators typically feature a box bed, similar in function to a pickup truck. The bed can also be installed as an electric dump ...