Easy to tighten  Fastener Expertise Q & A    No. 6
When the coupled member is subjected to a lateral external force, such as a bolted joint with a hinged hole, the failure is mainly ______.
A. Pull off the thread
B. Pulling and twisting at the thread
C. The bolt rod is sheared or bolted or crushed by the joint
D. Thread root fracture
Review: Easy to ask questions 5th adjustment and blocking thread---fastener expertise
For use as a thread for adjustment or blockage, _____ should be used.
A. triangular coarse thread B. rectangular thread C. zigzag thread D. triangular fine thread
A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable. The supporting shells are called blocks.
A pulley may also be called a sheave or drum and may have a groove or grooves between two flanges around its circumference. The drive element of a pulley system can be a rope, cable, belt, or chain that runs over the pulley inside the groove or grooves.
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Surface treatment: Painting, Powder coating, zinc plating, hard anodizing, only oiled
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Belt Pulley,Timing Pulley,Rope Pulley,Nylon Cable Pulley
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