Expected life of bearings in millions of revolutions                       ii) Design equivalent dynamic load in N                                            iii) Basic equivalent dynamic load in N                                               iv) Axial load acting on the bearing in N

Problem 6 The figure depicts a band brake whose drum rotates counterclockwise at 200 rev/min. The drum diameter is 16 in and the band lining 75 mm wide. The coefficient of friction is 0.20. The maximum lining interface pressure is pV=1.5 MPa.m/s. (a) Find the brake torque, necessary force P, and steady-state power. (b) Complete the free-body diagram of the drum. Find the bearing radial load that a pair of straddle-mounted bearings would have to carry. 75 mm- -250 mm-

Calculate the indicated power of a cylinder and the engine, if the mechanical efficiency of the engine is given as 75 % Calculate the brake power and friction power of the engine. Provide your answer in kW and hp. Study the power if the engine is a four stroke type. Cylinder bore 500 Piston stroke 2,050 Stroke/bore ratio Speed range Mean effective pressure = 2050/500 124-99 19.5 Maximum cylinder pressure Numbers of cylinders 5 to 8 Feedback: Correct answer = 155 mm mm rev/min bar bar

A helical compression spring is required to provide a minimum force of 150 lb at installation and have a working deflection of 1 in. The spring rate is 75 lb/in. The coil must fit in a 2.1-in-dia hole with 0.1 in total clearance. Use 0.25-in diameter unpeened music wire and squared/ground ends. Use a 15% clash allowance, shear modulus G = 11.5 Mpsi, and weight density γ = 0.285 lb/in3. Assume Sys = 0.6Sut. Part A Find the shear stress at the initial deflection. Express your answer in pounds per square inch to three significant figures.         τiτi =       Part B Find the mean stress. Express your answer in pounds per square inch to three significant figures.     Part C Find the alternating stress in the coil. Express your answer in pounds per square inch to three significant figures.     Part D Find the fatigue safety factor for infinite life in shear. Express your answer using three significant figures.…