1. A machine vice, as shown in the figure has single start, square threads with 22 mmnominal diameter and 5 mm pitch. The diameter of the collar is 55 mm. the coefficientsof friction for thread and collar are 0.15 and 0.17 respectively. The machinist cancomfortably exert a force of 125 N on the handle at a mean radius of 150 mm.Assuming uniform wear for the collar,a) Calculate the clamping force developed between the jaws,b) Calculate the overall efficiency of the clamp.FixedjawMovingjawFrameScrew150 mmHandle

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Answered: 1. A machine vice, as shown in the…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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A Machine vice has single start square threads with nominal diameter 22 mm and pitch 5 mm. Collar diameters are 55mm and 45mm respectively. Coefficient of friction for threads 0.15 and u for collar 0.17 The machinist can comfortably apply a force of 125N on handle of mean radius 150 mm. Assuming uniform wear theory calculate, (1) The clamping force developed between the jaws, (2) The overall efficiency of screw
The following data apply to the machinist clamp shown in the figure: Outside diameter of screw=1/2 in.; Root diameter=0.4350 in.; Pitch (single thread)=0.05 in.; Collar friction radius=0.20 in.; Collar friction coefficient=0.15; and screw friction coefficient=0.15. Assume that the machinist can comfortably exert a maximum force of 30 lbs. on the handle.Determine: (a) the clamping force developed between the jaws of the clamp; (b) the efficiency of the clamp; (c) the torque in the screw body at section A-A
Problem 1 The SERO CHIENS C is recreating rolling large stone columns by animal power and pivot points cut into the center of each of the column. The friction in each pivot point plus the rolling resistance creates a resisting couple of 300 ft*lb (like a rusty bearing). The yoke angle B = 10°. a) Determine how many horses (i.e. horsepower https://en.wikipedia.org/wiki/Horsepower) they need to move a 4600-lb column that is 10 ft long and 2 ft in diameter up a 0 = 5° slope from rest to 3 miles per hour after 15 feet of travel. b) Determine how many horses they need to maintain a constant speed of 3 mph up the slope. Round your answers up to the nearest integer. A fraction of horse doesn't pull very well. Assume the column rolls without slipping.
-- A double-threaded power screw with square threads pushes against a load of 3,822 N at a speed of 15 mm/s. The screw has a major diameter of 20 mm and a pitch of 6 mm. The frictional coefficient of the threads is 0.25, and collar friction is negligible. What is the rotational speed of the screw in units of revolutions per minute? Type your answer... 2 points
A double shoe brake is shown in the figure below. The drum has a diameter of 500 mm and rotates at 250 rpm in the anti-clockwise direction when the applied force is (P) 1000 N and the coefficient of friction is 0.25. Determine: 100 es0o 250 300 All dimensions are in mm (You should upload the answers in the Link provided for submitting the assignment, typing the answers in the box provided below is optional). (1) The braking torque in N-m (ii) The amount of heat generated due to braking action in kJ/sec. 250 007
A single-threaded power screw with square threads pushes against a load of 3,736 N at a speed of 42 mm/s. The screw has a mean thread diameter of 12 mm and a pitch of 3 mm. The frictional coefficient of the threads is 0.34, and collar friction is negligible. How much torque must be applied to drive the screw against the applied load in units of newton meters? Type your answer... -D
Hello, could you please help with the question i have attached as an image, thnks
Problem number 1 only. Thank you so much!
A worm gear reducer is driven by a 1200 rpm motor. The worm has 3 threads and the gear has 45 teeth. The circular pitch of the gear is p=0.5”, the center distance is 4.5 inches, the normal pressure angle is 20 degrees, and face-width of the gear is b=1 inch. Use a coefficient of sliding friction of 0.029. Determine:a. Gear and worm diameters, and worm Lead.b. The worm gear efficiency
An 6 in diameter pulley turning at 650 rpm is belt connected to a 12 in diameter pulley. Ifthere is a coefficient of friction of 0.05, and the thickness was considered because it has a thickenss of 1.25 in. find the speed of the 12 in pulley.
n Mukwano Industries, a shaft assembly shown in Fig. 2 is driven by a flat belt at location A and drives a flat belt at location B. The drive belt pulley diameter is 300 mm; the driven belt pulley diameter is 500 mm. The distance between sheaves is 800 mm, and the distance from each sheave to the nearest bearing is 200 mm. The belts are horizontal and load the shaft in opposite directions. Determine the size of the shaft using Distortion Energy Theory (DET) and the types of steel that should be used. Use a safety factor of 10. Also, provide a free-body diagram as well as moment and torque diagrams
Please don't provide handwritten solution .... 5.2 Sketch the following thread profiles for a nominal diameter of 25 mm and pitch 3 mm and give their applications: (a) BSW thread, (b) Buttress thread (c) Square thread, (d) ACME thread and (e) Worm thread

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