1. screw cutting lathes
2. feed mechanisms
3. spindles of bench vices
4. railway carriage couplings
railway carriage couplings
1. increase shank diameter
2. increase its length
3. drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread
4. tighten die bolt properly
drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread
1. wood-ruff key
2. feather key
3. flat saddle key
4. gib head key
wood-ruff key
1. wood-ruff key
2. feather key
3. flat saddle key
4. Gib head key
wood-ruff key
1. wood-ruff key
2. feather key
3. flat saddle key
4. Gib head key
flat saddle key
1. ductile material
2. brittle material
3. elastic material
4. hard material
ductile material
1. right hand threads on both ends
2. left hand threads on both ends
3. left hand threads on one end and right hand threads on other end
4. no threads
left hand threads on one end and right hand threads on other end
1. foundation purposes
2. locking devices
3. absorbing shock and vibrations
4. lifting and transportation of machines and cubicles
lifting and transportation of machines and cubicles
1. one small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
2. a slot is cut partly in middle of nut and then slot reduced by tightening a screw
3. hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
4. through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter pin split and bent in reverse direction at other end
hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
1. 102 d
2. 124 d
3. 138 d
4. 168 d
168 d