A 3/8-18 grade 8 bolt has 800 pounds of force pulling on it. Find the tensile force, the thread stripping strength for the needed length of engagement and the factor of safety for the bolt with that amount of force.

A series of three links is given with lengths of 2.4 ", 7.2" and 3.4 ", select the length of a fourth link, that when assembling the mechanism one of the links can be driven by a motor that rotates continuously. Mechanism is according to Grashoff, show all your operations to justify your results

A bolt with a square threaded screw has mean diameter of 25 mm and a pitch of 3 mm. It carries an axial thrust of 10 kN on the bolt head of 25 mm mean radius. If u = 0.12, find the force required at the end of a spanner 450 mm long, in tightening up the bolt. 3. [Ans. 110.8 N] A turn buckle with right and left hand threads is used to counle twvo railway coaches The threads

A belt drive consists of a flat belt stretched between two pulleys of equal diameter, 400mm, as shown in Figure Q1(a). The belt drive transmits a power of 250 W when the pulleys rotate at 150 rpm. The coefficient of friction between the belt and the pulley is 0.3. 400 mm Figure Q1(a) a) What is the value of the belt speed? b) What is the value of the effective tension transmitting power, T1-T2? c) What is the value of the ratio between the tight and slack tension, T1/T2? d) Use your answers to (b) and (c) to compute the individual values of T1 and T2. The belt has a density of 0.005 kg/cm3 and has a rectangular cross-section with width 5 cm and thickness 0.8 cm. The belt's maximum allowed stress is 50 N/cm2. e) Does the belt exceed its maximum allowed stress? Justify your answer.

What weight (kg) can be lifted by a double threaded screw that has an efficiency of 85% if it is opetated by a 52 lb force at the end of a 25 inches lever ?The pitch of the screw is 0.55 inches

One flange is attached to four 5x8 grade and M16 bolt connections with a total preload force of 80,000 N Calculate the factor of the bolt

A shaft turning 200 RPM is to drive another shaft at 250 RPM connected in open belt. Find the diameters of the two pulleys, using integral number of inches for each diameter, to give as nearly as possible a belt speed of 3500 FPM.

A 5/8 inch diameter double-thread Acme power screw with a thread coefficient of friction of 0.1 is being used to raise a load of 2,404 Ib. How much does the load move in inches to two decimal places during one full revolution of the power screw ? Selected Answer: 0.08 Correct Answer: 0.25 0.01

(Q2) A pump is driven by an electric motor using an open type flat belt. Determine the width and length of belt for the following data: Power transmission = 15kW Rotational speed of the motor=1,440 rpm Motor pulley diameter = 250 mm Pump pulley diameter = 500 mm Coefficient of friction for motor pulley = 0.26 Coefficient of friction for pump pulley 0.22 Center distance between the pulleys = 1,200 mm Thickness of the belt = 5 mm Density of belt material = 1,000 kg/m? Allowable stress for the belt material = 2 MPa