2. The screw of the small press has a mean diameter of 25 mm and has a single square thread with a lead of 8 mm. If the coefficient of the friction for both the threads and the bearing at A is 0.25, calculate the design torque M on the handwheel required: A. To produce a compressive force of 4 kN B. To loosen the press from the 4 kN compression.

2 - please provide a clear and complete solution, thanks!

Q-2      The rotating shaft running at n = 900 rpm, shown in the figure below, is machined from AISI 1045 CD steel. It is subjected to a force of F = 10.1 kN. The shaft is experiencing an operating temperature of 35 oC. With the specified loading and for a reliability of 99.9 %, a) Determine the minimum factor of safety for fatigue based on infinite life*.         b)  Determine the maximum safe load (Fmax) that can be applied for a factor of safety of 1.5 and a design life of 5x105 cycles, all other input values remaining the same.  c)  Determine factor of safety against yielding.     *Free-body, shear-force and bending moment diagrams are required.

Part A If the required clamping force at the board A is to be 85 N, determine the torque M that must be applied to the handle of the "C" clamp to tighten it down. The single square-threaded screw has a mean radius of 10 mm, a lead of 3 mm, and the coefficient of static friction is u, = 0.35. Express your answer to three significant figures and include the appropriate units. M = 1.1142 Nm O The unit you entered is not recognized. Review a list of acceptable units. No credit lost. Try again. Submit Previous Answers Request Answer Figure 1 of 1 Provide Feedback Next > M O Pearson