The lead screw of a lathe has Acme threads of 60 mm outside diameter and 8 mm pitch. It supplies drive to a tool carriage which needs an axial force of 2000 N. A collar bearing with inner and outer radius as 30 mm and 60 mm respectively is provided. The coefficient of friction for the screw threads is 0.12 and for the collar it is 0.10. Find the torque required to drive the screw and the efficiency of the screw.

The lead screw of a lathe has Acme threads of 60 mm outside diameter and 8 mm pitch. It supplies drive to a tool carriage which needs an axial force of 2000 N. A collar bearing with inner and outer radius as 30 mm and 60 mm respectively is provided. The coefficient of friction for the screw threads is 0.12 and for the collar it is 0.10. Find the torque required to drive the screw and the efficiency of the screw.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.57P: The square-threaded screw with a pitch of 10 mm and a mean radius of 18 mm drives a gear that has a...

See similar textbooks

Related questions

Q: Q1) The V thread of a screw jack has a single start with out side diameter 40 mm and 6 mm pitch. The…

A: According to the information we have A screw jack's V thread has a single start with an outside…

Q: The root diameter of a triple threaded power screw is 550 mm It has a pitch of 10 mm It is used to…

Q: Question 4 A pulley is driven by a flat belt, the angle of lap being 120°. The belt is 100 mm wide…

Q: A car engine has its rated output of 120 kW. The maxdmum - torque developed is 110 Nm, The clutch…

A: Answer: ◆ The dimensions of the friction plate are: Outer radius : ro = 133.75 mm and inner radius :…

Q: Find the magnitude and direction of the minimum pull required to haul a mass of weight 120N up a…

Q: ) A double square-threaded power screw transmits 1,800in-lb of torque and raises a machine head; the…

Q: Determine the percentage increase in power capacity made possible in changing over from flat belt…

A: T1T2flat=eμθT1=tension of tight side,T2=tension of slack side,θ=wrap…

Q: A square threaded screw of mean diameter 25 mm and pitch of thread 6 mm is utilised to lift a weight…

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

100%

The lead screw of a lathe has
Acme threads of 60 mm
outside diameter and 8 mm
pitch. It supplies drive to a
tool carriage which needs an
axial force of 2000 N. A collar
bearing with inner and outer
radius as 30 mm and 60 mm
respectively is provided. The
coefficient of friction for the
screw threads is 0.12 and for
the collar it is 0.10. Find the
torque required to drive the
screw and the efficiency of
the screw.

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

i need the answer quickly
Determine diameter of hand-wheel or length of handle, assuming that maximum force exerted by a man is 150 lbf. The bolt is 1" OD, 0.9" ID. Coefficient of friction is .15 You need to push down with a force of 6000lbf. This is for a handle of a screw press. Please explain the equation and I will upvote
A multi-disk clutch consists of two steel disks with one bronze disk. Theinner and outer diameters of the contacting surfaces are 200 and 250 mmrespectively. The coefficient of friction is 0.1 and the maximum pressurebetween the contacting surfaces is limited to 0.4 N/mm2. Assuming uniformwear theory, calculate the required force to engage the clutch and the powertransmitting capacity at 720 rpm
In a thrust bearing the external and the intermal diameters of the contacting surfaces are 320 mm and 200 mm respectively. The totail axial load is 80 kN and the intensity of pressure is 350 kN/m. The shaft rotates at 400 rpm. Taking the coefficient of friction as 0.06, calculate the power lost in overcoming the friction, Also, find the mumber of collars required for the bearing
4.) A flat belt makes contact with an 16 in. diameter pulley through half its circumference. If the coefficient of friction is 0.45 , and a torque of300ft−bsis to be transmitted, calculate the belt tensions. (please type answer not write by hend)
Determine the percentage increase in power capacity made possible in changing over from flat belt drive to V-belt drive. The diameter of pulley is same as the pitch diameter of grooved pulley. The pulley rotates at the same speed as the grooved pulley. The coefficient friction for the grooved and flat belt is same and is 0.3. The V-belt pulley groove angle is 60°. The belts are of the same material and have same cross-sectional area. In each case, The angle of warp is 150°.
Find the power transmitted by a belt running over a pulley of 600 mm diameter at200 r.p.m. The coefficient of friction between the belt and the pulley is 0.25,angle of lap 160° and maximum tension in the belt is 2500 N.
Plz attempt if you know the answer otherwise skip to another expert. A flat belt is required to transmit 30 kW from a pulley of 1.5 m effective diameter running at 300 rpm. The angle of contact is spread over 11/24 of the circumference. The coefficient of friction between the belt and pulley surface is 0.3. Determine taking centrifugal tension in to account, width of the belt required. It is given that the belt thickness is 9.5 mm, density of belt material is 100 kg / (m ^ 3) and the permissible working stress is 2.5 MPa.
A turnbuckle is used to connect two rods, one having right handed and other, having left handed V-threads. The angle of V-threads is 60 degrees. The rods have a mean diameter of 2 cm and 3 threads per cm. The coefficient of friction between the rods and the nut connecting the rods is 0.15. Find the forque required on the nut to produce a pull of 4 kN. Assume that rods do not twist.
A multiple V-belt drive is required to transmit 4 kW. The smaller pulley of the system is150 mm diameter, rotates at 200 rev/min, and has an angle of lap angle of 135°. Thegrove angle is 40° and the coefficient of friction between the belt and the pulleys is 0·3.If the maximum tension in any one belt is limited to 800 N, calculate:(a) The number of belts required. (b) The minimum tension in any one belt. (c) The required pre-tensioning of the belt. The centre-to-centre distance between the pulleys is 2 m.(d) Determine to the nearest mm, the required size for the larger pulley.(e) Find the approximate length of the belt
4.) A flat belt makes contact with an 18 in. diameter pulley through half its circumference. If the coefficient of friction is 0.45, and a torque of 350 ft-lbs is to be transmitted, calculate the belt tensions.
A fan is driven by a belt from a motor which runs at 880 rpm. A medium double ply leather belt 8 mm thick and 250 mm wide is used. The diameters of the motor pulley and the driven pulley are 350 mm and 1370 mm. The center distance is 1370 mm, and both pulleys are made of cast iron. Coefficient of friction of leather on cast iron is 0.35. The allowable stress for the belt is 2.4 MPa, which allows for the factor of safety and also for the fact that a double ply belt does not have double the capacity of a single ply belt. (A double ply belt has approximately 85% the capacity of a single ply belt of the same thickness.) The belt density p =970 kg/m^3. What is the power capacity? (Answer: 39.1 kW ) -0350 -1370