Machine Design
In thrust bearings, the load acts

In any direction
Perpendicular to the axis of rotation
Along the axis of rotation
Parallel to the axis of rotation

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Machine Design
The face of the tooth is the

Width of the tooth measured along the pitch circle
Surface of the tooth above the pitch surface
Surface of the tooth below the pitch surface
Surface of the top of the tooth

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Machine Design
Elastic nut is a locking device in which

A slot is cut partly in middle of nut and then slot reduced by tightening a screw
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end
Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip
One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

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