5. A driving gear at 20,000 rpm is used to drive a reduction gear delivering 2kW at 2,000 rpm. The gears are 20° involute herringbone gears of 10-pitch and 2.5 in effective width. The pinion has 50 teeth with a helix angle of 25°. Determine the load normal to the tooth surface.
5. A driving gear at 20,000 rpm is used to drive a reduction gear delivering 2kW at 2,000 rpm. The gears are 20° involute herringbone gears of 10-pitch and 2.5 in effective width. The pinion has 50 teeth with a helix angle of 25°. Determine the load normal to the tooth surface.
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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QUESTION 5 PLS

Transcribed Image Text:4. The worm gear rotating at 1250 rpm drives a worm wheel and whose velocity
ratio is 12 to 1. A driving motor with 12 hp is used to supply the worm with worm
pitch gear diameter of 3.5 in. Find the tangential force on the gear.
5. A driving gear at 20,000 rpm is used to drive a reduction gear delivering 2kW at
2,000 rpm. The gears are 20° involute herringbone gears of 10-pitch and 2.5 in
effective width. The pinion has 50 teeth with a helix angle of 25°. Determine the
load normal to the tooth surface.
6. A pair of bevel gear, 5-pitch, 14.5 °, involute have 3:1 reduction. The pitch
diameter of the driver is 13 inches and face width of 3 in. Determine the face angle
of pinion and gear. (Angle between shafts is 78 degrees angle)
7. A 3/8 inch flat belt is 12 inches wide and is used on 24 inches diameter pulley
rotating at 600 rpm. The specific weight of belt is 0.035 lb/in3. The angle of contact
is 150 °. If coefficient of friction is 0.3 and stress is 300 psi, how much power can it
deliver?
8. A cross belt connected pulleys has 10 cm diameter and 30 cm diameter. If center
distance is 50 cm, determine the length of cut if belt is connected open.
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