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Question: example 81 uare thread power screw has a major diameter...

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Example 8.1 uare- Thread power screw has a major diameter of 32mm and a pitch of 4mm with double threads, and it is to be used in an application similar to that in the figure. The given data include =0.08, dc-40mm, and F-64KN per screw.. 1. Find the threads depth,thread width,pitch diamter,minor diameter and lead. 2. Find the torque required to raise and lower the load. 3. Find the efficiency during lifting the load. 4. Find the body stresses,torsional and compressive. 5. Find the bearing stress. Find the thread stresses bending at the root ,shear at the root, and von mises stress and maximum shear stress at the same location. 6.
A power screw is 25 mm in diameter and has a thread pitch of 5 mm. (a) Find the thread depth, the thread width, the mean and root diameters, and the lead, pro- vided square threads are used. (b) Repeat part (a) for Acme threads.
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