--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. Thefrictional 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

Here, p is pitch, is major diameter of screw.

Answered: What is the rotational speed of the…

Engineering

Mechanical Engineering

What is the rotational speed of the screw in units of revolutions per minute?

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

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Concept explainers

Metrology of Screw Threads

Screw threads are a series of ridges having the profile of a helix. This helix profile runs continuously along the length of a uniform solid or a hollow bar of a circular cross-section at periodic intervals. These helix ridges are also formed over a conical bar. These continuous helical ridges are termed threads.

Question

--
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

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Step 1: Calculate the screw mean diameter.

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Step 2: Calculate the lead angle.

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Step 3: Calculate the friction angle.

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Step 4: Calculate the rotational speed of the screw by equating power equations for raising the load.

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