Answer to Question #191462 in Mechanical Engineering for Brian

Question #191462

Two coaxial solid shafts of diameter 120mm each are to be connected by a flanged coupling using M12 X 1.5 steel bolts equally spaced around a 320mm pitch circle diameter of the flange. The flanges have thickness of 15mm each and must be welded to the shafts. The coupling must deliver 500kW of power at 400rpm.If the allowable shear stress and bearing pressure are 90N/mm2 and 65N/mmw respectively,on the basis of power being delivered,design the coupling by; Determine (a) Number of bolts required (b) size of the weld (c) efficiency of the coupling

Expert's answer

Given :

Load on shaft:

Torque Transmitted :

1) Size of bolt :

Load on each bolt

2) Number of bolts :

Torque transmitted

Output Torque

3) efficiency of coupling

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