A hoisting drum 0.5 m in diameter is keyed to a shaft which is supported in two
bearings and driven through a 12 : 1 reduction ratio by an electric motor. Determine the power of the
driving motor, if the maximum load of 8 kN is hoisted at a speed of 50 m/min and the efficiency of the
drive is 80%. Also determine the torque on the drum shaft and the speed of the motor in r.p.m.
Determine also the diameter of the shaft made of machinery steel, the working stresses of which are
115 MPa in tension and 50 MPa in shear. The drive gear whose diameter is 450 mm is mounted at the
end of the shaft such that it overhangs the nearest bearing by 150 mm. The combined shock and
fatigue factors for bending and torsion may be taken as 2 and 1.5 respectively.
Type your question here (or upload an image)
Brown University1271 Tutors
California Institute of Technology2131 Tutors
Carnegie Mellon University982 Tutors
Columbia University1256 Tutors
Dartmouth University2113 Tutors
Emory University2279 Tutors
Harvard University599 Tutors
Massachusetts Institute of Technology2319 Tutors
New York University1645 Tutors
Notre Dam University1911 Tutors
Oklahoma University2122 Tutors
Pennsylvania State University932 Tutors
Princeton University1211 Tutors
Stanford University983 Tutors
University of California1282 Tutors
Oxford University123 Tutors
Yale University2325 Tutors
Enter the email address associated with your account, and we will email you a link to reset your password.
Forgot your password?
Business & Finance
How it Works
Become a Tutor
Media & Press
Studypool inc. © 2015
Studypool is a marketplace that helps students get efficient academic help.