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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]
Bolt preload can also be controlled by torquing the bolt to the point of yielding. Under some circumstances, a skilled operator can feel the drop off of the work required to turn the torque wrench as the material of the bolt begins to yield. At that point the bolt has a preload determined by the bolt area and the yield strength of the bolt ...
Due to the potential problems associated with a cheater bar or snipe, some situations may require an alternative to loosening and removing threaded pipe, screws, bolts or other fasteners. Hydraulic Chain Pipe Wrench – A hydraulic driven wrench which will safely remove threaded pipe from other threaded coupling, valve, etc. while the other ...
WASHINGTON (Reuters) -Boeing issued a bulletin to its suppliers late last week that laid out practices to ensure bolts are properly torqued after multiple airlines reported loose hardware during ...
Earlier in the day, the two airlines that use the aircraft in question, the Boeing 737 Max 9, reported loose bolts in the area of those plug doors, panels used in place of emergency exits that ...
For example, if a standard automotive bolt in the U.S. is being secured, then the safety wire when installed should put tension on the bolt in a clockwise direction, since that is the direction that the bolt turns to tighten. [7] When drilling a fastener, the choice of where to drill it depends on the type of fastener and to what it will be wired.
The airline operates 79 Max 9 planes. Reutersquoted a source familiar with the matter as saying that United had identified nearly 10 aircraft with loose bolts during its initial inspections.
An assortment of screws, and a US quarter for size comparison A wood screw: a) head; b) non-threaded shank; c) threaded shank; d) tip The six classical simple machines. A screw is an externally helical threaded fastener capable of being tightened or released by a twisting force to the head.
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