Hydrostatic lubricated bearing
Hydrodynamic lubricated bearing
Boundary lubricated bearing
Zero film bearing
A. Hydrostatic lubricated bearing
Initial tension
External load applied
Sum of the initial tension and external load applied
Initial tension or external load, whichever is greater
Is directly proportional to
Is inversely proportional to
Is equal to cos φ multiplied by
Does not depend upon
Has a head on one end and a nut fitted to the other
Has head at one end and other end fits into a tapped hole in the other part to be joined
Has both the ends threaded
Has pointed threads
Bolts and nuts
Studs
Headless taper bolts
None of these
Angular bevel gears
Mitre gears
Internal bevel gears
Crown bevel gears
Decreasing the cross-section area of bar
Increasing the cross-section area of bar
Remain unaffected with cross-section area
Would depend upon other factors
(Kf + 1)/ (Kt + 1)
(Kf - 1)/ (Kt - 1)
(Kt + 1)/ (Kf + 1)
(Kt - 1)/ (Kf - 1)
Ductile materials
Brittle materials
Equally serious in both cases
Depends on other factors
Module
Tooth profile
Both module and pitch line velocity
Pitch line velocity
40
50
70
100
Maximum at the outer surface and minimum at the inner surface
Maximum at the inner surface and minimum at the outer surface
Maximum at the inner surface and zero at the outer surface
Maximum at the outer surface and zero at the inner surface
Axial load only
Both radial and axial loads and the ratio of these being greater than unity
Radial load only
Both radial and axial loads and the ratio of these being less than unity
Effective tension is equal to centrifugal tension
Effective tension is half of centrifugal tension
Driving tension on slack side is equal to centrifugal tension
Driving tension on tight side is twice the centrifugal tension
Combined effect of transverse shear stress and bending stress in the wire
Combined effect of bending stress and curvature of the wire
Combined effect of transverse shear stress and curvature of wire
Combined effect of torsional shear stress and transverse shear stress in the wire
60°
55°
47°
29°
Bolted joint
Knuckle joint
Cotter joint
Universal joint
Addendum
Dedendum
Clearance
Working depth
Increasing its shank diameter
Decreasing its shank diameter
Tightening the bolt properly
Making the shank diameter equal to core diameter of thread
(k₁ k₂)/ (k₁ + k₂)
(k₁ - k₂)/ (k₁ + k₂)
(k₁ + k₂)/ (k₁ k₂)
(k₁ - k₂)/ (k₁ k₂)
Bolts
Keys
Cotters
Rivets
(1/2) × √(σ² + 4τ²)
√(σ² + 4τ²)
(1/2) × [σ + √(σ² + 4τ²)]
σ + √(σ² + 4τ²)
Both the ends fixed
Both the ends hinged
One end fixed and the other end hinged
One end fixed and the other end free
(WD/ πd3) × K
(2WD/ πd3) × K
(4WD/ πd3) × K
(8WD/ πd3) × K
2.5
2.8
3.0
3.5
Brittle materials
Ductile materials
Elastic materials
Plastic materials
120°
180°
270°
360°
Shoe brake
Band and block brake
Band brake
Internal expanding brake
(1 - sinφ)/ (1 + sinφ)
(1 + sinφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + cosφ)
(1 + cosφ)/ (1 - sinφ)
Brittle materials
Ductile materials
Brittle as well as ductile materials
Elastic materials
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