1) [20 pts] Power screw geometry A power screw is 26 mm in diameter and has...
A single-square threaded 35-mm power screw is 35 mm in diameter with a pitch of 5 mm. A vertical load on the screw reaches a maximum of 5 kN. The coefficients of friction are 0.06 for the collar and 0.09 for the threads. The frictional diameter of the collar is 45 mm. Find the overall efficiency and the torque to "raise" and "lower" the load Repeat this problem if ACME screw is used in this design. A single-square threaded 35-mm...
2. A square threaded power screw is used for a machine tool. The screw has 75 mm external diameter and 12 mm pitch. The operating nut takes the axial load of 550 N on a flat surface of 70 mm and 105 mm internal and external diameters respectively If the coefficient of friction is 0.16 for all contact surfaces on the nut, determine the power required to rotate the operating nut when the cutting speed is 7.5 m/min. Also find...
1. A single-threaded ACME power screw has a major diameter d=1.25 in with a pitch of 0.2 in. The threaded coefficient of friction u is 0.2, and the coefficient of collar friction He is 0.15. The mean collar diameter de is 2 in. The external load on the screw is 1200 lb. Find: a) The torque required to raise the load. b) The maximum nominal shear stress of the screw body.
triple-threaded power screw is to taise/lower à 100kN load. This s square threads. Thread kinematic friction is 0.05. The loading collar has a Problem#2020pts). A 5andiameter diameter of 25cm and is a) Continuous torque required to raise the load? b) Efficiency of the system during raising the load screw has a pitch of 0.5cm and has threads using bal bearing design with a static/kinematic friction of 0.01. Determine e Considering ductile behavior with a Yield strength of 100MPa, what is...
The C-clamp shown in Fig. 2 uses a double threaded square screw with minor diameter 32 mm and pitch of 4 mm. The frictional coefficients are 0.2 for the threads and 0.15 for the collar. The collar has a friction diameter of 50 mm. i. Determine the maximum force P to be applied to the handle at a radius 5 cm from the screw centreline if the clamping force is F-50 N Evaluate whether self-locking occurs. ii. 5 cm
A power screw used to resist a vertical load uses a 5/8 inch - 6 Acme thread.Friction coefficients: f=fc=0.05Collar friction diameter: 7/16 inch.a) Find the minimum vertical load at which the load will lower itself without any external effort. (But it does not depend on theload?)b) Determine the torque required to raise this load.
2) [30 pts] C-clamp with handle, power screw For the C clamp shown, a force is applied at the end of the 0.375 in diameter handle. The screw is a 0.75 in-6 Acme thread (from Figure 8-3), and is 10.4 in long overall, with a maximum of 8 in possible in the clamping region. The handle and screw are both made from cold-drawn AISI 1006 steel. The coefficients of friction for the screw and the collar are 0.15. The collar,...
02: A bar of 60 mm diameter and length of 3 meter is used to produce 500 pieces on a center lathe having the following characteristics: . Maximum rotational speed .Minimum rotational speed .Number of speeds Lathe overall efficiency The turning process is performed at 40 m/min cutting velocity. 0.5 mm/rev longitudinal feed, 0.25 mm/rev transverse feed and 2 mm depth of cut REQUIRED 1. Calculate the TWELVE rotational speeds in rpm. 2. What rotational speed would you choose? 3....
its applied engineering data analysis course Q4 X is the diameter (in mm) of tires, normally distributed with mean 575 and a standard deviation of 5 SKETCH THE AREA of P(575 < X < 579) in both X and Z and find P Find the diameter x such that there are only 1% tires longer than this diameter ie. P[X>x] 0.01 Find the (diameters of) tires that have most extreme 5% diameters. a. b. C.
Question #5 (20 pts) A pinion has 18 teeth and a diametral pitch of 9 teeth/in, a face width of 1,5 in sa pressure angle of 20° with full-depth teeth. The spur gear is made by the milling or emin required to transmit at least 11 hp horsepower with a corresponding speed and moderate applications. Which material is the best choice for the spu ones in Table 5 considering the maximum allowable bending stres (factor of safety, nd-2.5)? U quations...