MACHINE DESIGN

All of these

Have low starting and low running friction at moderate speeds

Can carry both radial and thrust loads

Have high initial cost

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

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

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 spitted and bent in reverse direction at other end

A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

A slot is cut partly in middle of nut and then slot reduced by tightening a screw

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

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 the other end

A slot is cut partly in middle of nut and then slot reduced by tightening screw

A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

A slot is cut partly is middle of nut and then slot reduced by tightening a screw

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end