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A double-thread worm has a pitch diameter of 3 inches. The wheel has 20 teeth and a pitch diameter of 5 inches. Find the gear helix angle. (ANS. 9.46°)

A double-thread worm has a pitch diameter of 3 inches. The wheel has 20 teeth and a pitch diameter of 5 inches. Find the gear helix angle. (ANS. 9.46°)

Elements Of Electromagnetics
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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Just number 3 please
3. A double-thread worm has a pitch diameter of 3 inches. The wheel has 20 teeth and a pitch diameter of 5 inches. Find the gear helix angle. (ANS. 9.46°) 4. A 12-in gear is mounted on a 2-in shaft and is held in place by a 7/16 in set screw. For a design factor of 3 what would be the tangential load that could be applied to the teeth if the holding force of a 7/16 in screw is 2500lb? (ANS. 139 pounds) 5. Two shafts are connected by spur gears. The pitch radii of the gears A and B are 207 mm and 842 respectively. If the shaft a makes 350 revolutions per minute and is subjected to twisting moment of 236 N.m what is the tooth pressure of the two gears? (ANS. 1177 N)
Transcribed Image Text:3. A double-thread worm has a pitch diameter of 3 inches. The wheel has 20 teeth and a pitch diameter of 5 inches. Find the gear helix angle. (ANS. 9.46°) 4. A 12-in gear is mounted on a 2-in shaft and is held in place by a 7/16 in set screw. For a design factor of 3 what would be the tangential load that could be applied to the teeth if the holding force of a 7/16 in screw is 2500lb? (ANS. 139 pounds) 5. Two shafts are connected by spur gears. The pitch radii of the gears A and B are 207 mm and 842 respectively. If the shaft a makes 350 revolutions per minute and is subjected to twisting moment of 236 N.m what is the tooth pressure of the two gears? (ANS. 1177 N)
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