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

Answered: Image /qna-images/answer/5307fb9b-1c65-4d78-ae65-db8d5e9c9b72.jpg

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

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

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
Fast please
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
Spur gears Note : Exam is open notes &tables / Answer all questions. Q.1. The press shown for Figure.1 has a rated load of 22 kN. The twin screws have double start Acme threads, a diameter of 50 mm, and a pitch of 6 mm. Coefficients of friction are 0.05 for the threads and 0.08 for the collar bearings. Collar diameters are 90 mm. The gears have an efficiency of 95 percent and a speed ratio of 60:1. A slip clutch, on the motor shaft, prevents overloading. The full-load motor speed is 1720 rev/min. (a) When the motor is turned on, how fast will the press head move? (Vm= , Vser. = ) (5M) (b) What should be the horsepower rating of the motor? (TR=, Tc= Pser. = " Bronze bushings Foot Motor Bearings watt, Pm= watt, Pm= h.p.) (20M) 2['s Fig.1 Worm Collar bearing
show all steps
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.
4 A double-threaded power screw with square threads pushes against a load of 3,641 N at a speed of 15 mm/s. The screw has a major diameter of 20 mm and a pitch of 3 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
4. A square-threaded power screw has a mean diameter, dm = 1.75 in and a pitch, p = 0.875 in. The coefficient of thread friction is 0.10 and the collar friction is negligible. What horsepower is required to raise a weight of 3000 lbf at a rate of 20 ft/min?
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
34 in 3. The following data apply to the C-clamp: a. The screw is ACME with ¾" Diameter b. Coefficient of thread friction = 0.12 c. Coefficient of collar friction = 0.23 d. Mean collar radius = 0.55 in. e. Max. clamping force = 1000 lb Determine: The tightening torque The operator force at the end of the handle (Note: Use table 8-3 to determine the screw pitch (p))
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.

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS