A double threaded Acme screw of 1.5-in major diameter is used in a jack to raise a 6.5 kip load. The jack has a plain thrust collar with 2.2-in mean diameter and the coefficients of kinetic friction are estimated as 0.12 for the collar and 0.15 for the screw. If the screw has the following parameters lead 0.5 in, thread angle in the normal plane 14.4, and mean diameter 1.375 in, determine the running efficiency of the jack in raising the load. N] X 35

A double threaded Acme screw of 1.5-in major diameter is used in a jack to raise a 6.5 kip load. The jack has a plain thrust collar with 2.2-in mean diameter and the coefficients of kinetic friction are estimated as 0.12 for the collar and 0.15 for the screw. If the screw has the following parameters lead 0.5 in, thread angle in the normal plane 14.4, and mean diameter 1.375 in, determine the running efficiency of the jack in raising the load. N] X 35

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

Related questions

Q: A single-threaded power screw of square form is to raise a load of 90KN at the rate of 360mm/min.…

A: The given information in the problem are shown in the following attached image:

Q: In the machine design the bed with a mass of 250 kg is moved by a lead screw which has a square…

Q: A double-threaded power screw is used to raise a load of 5 kN. The nominal diameter is 60 mm and…

Q: The figure shows a band brake designed to prevent "backward" rotation of the shaft. The angle of…

Q: 1. A single-threaded 25-mm power screw is 25-mm in diameter with a pitch of 5mm. A vertical load on…

Q: A trapezoidal-threaded power screw with a crest diam- eter of 30 mm and single thread is used to…

A: Given : crest diameter, dc = 30 mm load, W = 50 KN collar mean diameter, D = 40 mm coefficient of…

Q: Two identical 4 in. major-diameter power screws (single-thread) with modified square threads are…

A: Given:f = 0.1fc = 0.24v = 3ft/min = 36 in /minTo find:Power required to drive each screw when the…

Q: A screw jack having a 2 in double-thread Acme screw is used to raise a load of 6200 lb. A plain…

Q: single square-thread screw has an input power of 3 kW at a speed of 1 rev/s. The screw has a…

Q: The following parameters are given for the journal bearing. µ = 4 ureyn, N = 651 rev/min, W = 851…

A: The above question based on journal bearing. To calculate the parameters we will use following…

Q: A screw jack shown in figure (8) with a 1-in., double-thread Acme screw is used to raise a load of…

A: given: load,W=1000lbs thrust collar,Dc=15in. for double thread, thread/in.=4 from data book,…

Q: Design a compression coupling for a shaft to transmit 1300 N-m. The allowable shear stress for the…

Concept explainers

Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.

Question

A double threaded Acme screw of 1.5-in major diameter is used in a jack to raise a 6.5 kip load. The jack has a plain thrust collar with 2.2-in mean diameter and the coefficients of
kinetic friction are estimated as 0.12 for the collar and 0.15 for the screw.
If the screw has the following parameters.
lead 0.5 in, thread angle in the normal plane - 14.4, and mean diameter 1.375 in,
determine the running efficiency of the jack in raising the load N]
35

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Design of Power Transmission Elements and Power Transmission Systems

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A rigid block is supported by two cables having the same diameter of 4 mm. Cable S1 is made of AISI 1050 cold drawn steel with E=200,000 MPa, Sy=580 MPa, and Sult=690 MPa; cable S2 is made of AISI 1020 cold drawn steel with E=200,000 MPa, Sy=390 MPa, and Sult=470 MPa. Determine the maximum number of cycles n3 due to the following history of P.
A car jack uses a single square-thread screw to raise a known load. The major diameter and pitch of the screw and the thrust collar mean diameter are known. Running friction coefficients are estimated. Find: (a) Determine the thread depth and helix angle. (b) Estimate the starting torque for raising and lowering the load. (c) Estimate the efficiency of the jack for raising the load. (d) Estimate the power required to drive the screw at a constant 1 revolution per second. Schematic and Given Data: Load 50 kN NOTE: ANSWER ONLY LETETRS C AND D.
Please help. Written on paper not typed on computer please. Need help on all questions. Please include all units, steps to the problem and information such as its direction or if it is in compression or tension. Thx.
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
A single square thread power screw has a lead of 7 mm and mean diameter of 35 mm. If it Is used to lift a load of 30 kN and coefficient of friction of thread is 0.18, find the torque required to turn the screw.
Pravinbhai
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.…
A single-threaded 25-mm power screw is 25 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. If the effort load is 75 N, find the force ratio and movement ratio.
10 kN FIGURE P5-36 In Problem 5-36, if a force P= 400 N is required to resist the 10-kN force. determine the coefficient of static friction between the rope and the shafts. 5-37