Rectangular
Elliptical
I-section
Any one of these
D. Any one of these
3 mm
5 mm
10 mm
20 mm
F/bh
3F/2bh
2F/bh
4F/bh
Similar to small size tap bolts except that a greater variety of shapes of heads are available
Slotted for a screw driver and generally used with a nut
Used to prevent relative motion between two parts
Similar to stud
Angular bevel gears
Mitre gears
Internal bevel gears
Crown bevel gears
Pitch diameter
Inside diameter
Outside diameter
Height
124 d
138 d
151 d
168 d
½
1
2
4
Pitch circle to the top of a tooth
Pitch circle to the bottom of a tooth
Top of a tooth to the bottom of a tooth
Addendum circle to the clearance circle
d + 17 mm
2d + 13 mm
2d + 20 mm
3.5d
Shafts are arranged parallel and rotate in the opposite directions
Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction
Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft
Increases linearly
Decreases linearly
Remains same
Increases exponentially
T sec3φ
T sec²φ
T/sec3φ
T cosecφ
Remains constant at all speeds
Is minimum at zero speed and increases monotonically with increase in speed
Is maximum at zero speed and decreases monotonically with increase in speed
Becomes minimum at an optimum speed and then increases with further increase in speed
Reducing stress concentration
Ease of manufacture
Safety
Fullering and caulking
Margin
Pitch
Back pitch
Diagonal pitch
Ductile materials
Brittle materials
Elastic materials
All of the above
Plasticity
Elasticity
Ductility
Malleability
One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
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
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
1100 to 1300°C
1300 to 1500°C
500 to 600°C
700 to 900°C
Low efficiency
High efficiency
High load lifting capacity
High mechanical advantage
Joint may not open up
Bolts are weakest elements
The resultant load on the bolt would not be affected by the external cyclic load
Bolts will not loosen during service
Be independent of ratio of mass of load W to mass of bar (y)
Increase with increase in y
Decrease with decrease in y
Depend on other considerations
(Sum of base circle radii)/cosφ
(Difference of base circle radii)/cosφ
(Sum of pitch circle radii)/cosφ
(Difference of pitch circle radii)/cosφ
Butt joint with single cover plate
Butt joint with double cover plate
Lap joint with one ring overlapping the other
Any one of the above
Ring nut
Castle nut
Sawn nut
Jam nut
Base circle
Pitch circle
Prime circle
Pitch curve
Both sides of the actual size
One side of the actual size
One side of the nominal size
Both sides of the nominal size
Butt weld
Fillet weld
Sleeve weld
Socket weld
Direction of twist of wires in strands is opposite to the direction of twist of strands
Direction of twist of wires and strands are same
Wires in two adjacent strands are twisted in opposite direction
Wires are not twisted
Gib of cotter joint
Sleeve and cotter joint
Spigot socket cotter joint
Knuckle joint