Machine Design
Turn buckle has

Right hand threads on bout ends
Left hand threads on one end and right hand threads on other end
Left hand threads on both ends
No threads

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Machine Design
The effective stress in wire ropes during normal working is equal to the stress due to

Axial load plus stress due to acceleration/retardation
Acceleration/retardation of masses plus stress due to bending
Axial load plus stress due to bending
Bending plus stress due to acceleration/retardation

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