A flange coupling is to connect two 57mm shafts. The hubs of the coupling are each 111m in diameter and 92mm hub length. Six 16- mm bolts in a 165-mm diameter bolt circle connects the flanges. The key is 14mm high, 14mm wide and 86mm long. Coupling is to transmit 45kW at 160 rpm. For all parts, yield point value in shear is one-half the yield point value in tension or compression that is 448MPa. Determine a. Shearing stress of the key and its factor of safety b. Bearing stress of the key and its factor of safety c. Shearing stress in bolts and the factor of safety based on yield point

A flange coupling is to connect two 57mm shafts. The hubs of the coupling are each 111m in diameter and 92mm hub length. Six 16- mm bolts in a 165-mm diameter bolt circle connects the flanges. The key is 14mm high, 14mm wide and 86mm long. Coupling is to transmit 45kW at 160 rpm. For all parts, yield point value in shear is one-half the yield point value in tension or compression that is 448MPa. Determine a. Shearing stress of the key and its factor of safety b. Bearing stress of the key and its factor of safety c. Shearing stress in bolts and the factor of safety based on yield point

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.70P: Solve Sample Problem 7.16 if the contact pressure under the polisher varies parabolically from p0 at...

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A flange coupling is to connect two 57 mm shafts. The hubs of the coupling are each 111 mm in diameter and 92mm thick and the flange web are 19 mm thick. Six 16 mm bolts in a 165 mm diameter circle connect the flange.The keyway is 6 mm shorter than the hub’s thickness and key is 14 mm x 14 mm. Coupling is to transmit 45 KW at160 rpm. For all parts, yield point value in shear is one – half the yield value which is 448 MPa. Calculate the forceon the shaft
6. Design a clamp coupling for transmitting 36 kW, at 200 rpm. Allowable shear stress in shaft is 45 MPa, allowable shear stress in key is 40 MPa, and allowable crushing stress in key is 90 MPa. The number of bolts joining the two halves is 4. The permissible tensile stress in bolts is 60 MPa. The coefficient of friction between the muff and shaft can be taken as 0.25
PROBLEM: A flange coupling is to connect two 57 mm shafts. The hubs of the coupling are each 111 mm in diameter and 92 mm hub length. Six 16-mm bolts in a 165-mm diameter bolts circle connect the flanges. The keyway is 6 mm shorter than the hub length and the key is 14 mm x 14 mm. Coupling is to transmit 45 kW at 160 rpm. For all parts, yield point value in shear is one-half the yield point value in tension or compression that is 448 MPa. Find a) the shearing stress of key and its factor of safety; b) the bearing stress of key and the factor of safety based on yield point; c) the shearing stress in bolts and factor of safety based on yield point. (Board problem, November 1983) 14 mm x 14 mm x 86 mm d = 16 mm Dr = 111 mm D= 57 mm Dp = 165 mm w = 50 mm 92 mm Dimensions in mm
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A fan is driven by a belt from a motor which runs at 880 rpm. A medium double ply leather belt 8 mm thick and 250 mm wide is used. The diameters of the motor pulley and the driven pulley are 350 mm and 1370 mm. The center distance is 1370 mm, and both pulleys are made of cast iron. Coefficient of friction of leather on cast iron is 0.35. The allowable stress for the belt is 2.4 MPa, which allows for the factor of safety and also for the fact that a double ply belt does not have double the capacity of a single ply belt. (A double ply belt has approximately 85% the capacity of a single ply belt of the same thickness.) The belt density p =970 kg/m^3. What is the power capacity? (Answer: 39.1 kW ) -0350 -1370