Bearings Motor Spur gears - Worm Bronze bushings - 2L 's C.I. Collar ´bearing 2 [ s The press shown in the following figure has a rated load of 5000 lbf. The twin screws have Acme threads, a diameter of 3 in, and a pitch of 1/2 in. Coefficients of friction are 0.05 for the threads and 0.06 for the collar bearings. Collar diameters are 5 in. The gears have an efficiency of 95 percent and a speed ratio of 75:1. A slip clutch, on the motor shaft, prevents overloading. The full-load motor speed is 1720 rev/min. (a) When the motor is turned on, how fast will the press head move? (b) What should be the horsepower rating of the motor?

Bearings Motor Spur gears - Worm Bronze bushings - 2L 's C.I. Collar ´bearing 2 [ s The press shown in the following figure has a rated load of 5000 lbf. The twin screws have Acme threads, a diameter of 3 in, and a pitch of 1/2 in. Coefficients of friction are 0.05 for the threads and 0.06 for the collar bearings. Collar diameters are 5 in. The gears have an efficiency of 95 percent and a speed ratio of 75:1. A slip clutch, on the motor shaft, prevents overloading. The full-load motor speed is 1720 rev/min. (a) When the motor is turned on, how fast will the press head move? (b) What should be the horsepower rating of the motor?

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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= Q.3: Calculate the power that can be transmitted safely by a pair of spur gears with the data given below and calculate also, the bending stresses induced in the two wheels when the pair transmits this power. Number of teeth in the pinion 20, Number of teeth in the gear = 80, Module = 4 mm, and Width of teeth = 60 mm, Tooth profile involute, Allowable bending strength of the material;( 200 MPa, for = 400 r.p.m and pinion) and (160 MPa, for gear), Speed of the pinion Service factor = 0.8. = 20° Q.4: Design a wire rope for an elevator (Miscellaneous hoists) in a building of (60 m) height, for a total load (20 kN). The speed of the elevator is (240 m/min) and the full speed is reached at (10 sec). Taken the grade wire is (110), the safety factor is 2.5 and Er =84 x 103 N/mm².
A helical cast steel gear with 30o helix angle has to transmit 35 kW at 2000 rpm. If the gears has 25 teeth, find the necessary module, pitch diameters and face width for 20o full depth involute teeth. The static stress for cast steel may be taken as 100 MPa. The face width may be taken as 3 times to normal pitch. The tooth form factor is given by the expression y'= 0.154-0.912/TE, where TE represents the equivalent number of teeth. the velocity factor is given by Cv=6/(6+v), where v is the peripheral speed of the gear in m/s.
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The press shown for Prob. 8-5 has a rated load of 5000 lbf. The twin screws have Acme threads, a diameter of 2 in, and a pitch of in. Coefficients of friction are 0.05 for the threads and 0.08 for the collar bearings. Collar diameters are 3.5 in. The gears have an efficiency of 95 per- cent and a speed ratio of 60:1. A slip clutch, on the motor shaft, prevents overloading. The full- load motor speed is 1720 rev/min. (a) When the motor is turned on, how fast will the press head move? (b) What should be the horsepower rating of the motor? Spur gears Bearings Motor Worm Bronze bushings -2L 's Collar bearing
3 The press shown below has a rated load of 25 kN The twin screws have Acme threads, a diameter of 56 mm, and a pitch of 5.5 mm. Coefficients of friction are 0.05 for the threads and 0.08 for the collar bearings. Collar diameters are 88 mm. The gears have an efficiency of 95 percent and a speed ratio of 60: 1. The full-load motor speed is 1750 rev/min. a. When the motor is turned on, how fast will the press head move? b. What should be the horsepower rating of the motor? Bearings Motor Spur gears Bronze bushings (مزدوج) Foot Worm Collar bearing
The value of curvature correction factor k, will be if the spring index is 6. O a. 1.33 O b. 1.08 O c. 0.92 O d. 4.00 The figure below shows the components of normal forces, the value of radial force on the gear wheel due to a tangential force of 642 N is N, Take pressure angle as 14½0. at Pitch P. point Gear driven to 02 The radial force is
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1) A pair of cast iron bevel gears connect two shafts at right angles. The pitch diameters of the pinion and gear are 80 mm and 100 mm respectively. The tooth profiles of the gears are of 14 1/2° composite form. The allowable static stress for both the gears is 55 MPa. If the pinion transmits 2.75 kW at 1100 r.p.m., find the module and number of teeth on each gear from the standpoint of strength and check the design from the standpoint of wear. Take surface endurance limit as 630 MPa and modulus of elasticity for cast iron as 84 kN/mm2.
1) A pair of cast iron bevel gears connect two shafts at right angles. The pitch diameters of the pinion and gear are 80 mm and 100 mm respectively. The tooth profiles of the gears are of 14 1/2° composite form. The allowable static stress for both the gears is 55 MPa. If the pinion transmits 2.75 kW at 1100 r.p.m., find the module and number of teeth on each gear from the standpoint of strength and check the design from the standpoint of wear. Take surface endurance limit as 630 MPa and modulus of elasticity for cast iron as 84 kN/mm². A0a& ENG 1222/20 nere to search
3. A double-threaded right-handed worm gear transmit 15-hp at 1150 rpm. The pitch of the worm is 0.75 inch/tooth and the pitch diameter is 3-inches. The pressure angle is 14.5° and the coefficient of friction is 0.12. Find: a. The tangential force on the gear b. The tangential force on the worm c. The separating force
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