Chapter 11: Metal Fits, Tolerances, and Surface Texture

SYMBOLS ^[1], ^[2], ^[3]

A		area of cross section, m ² (in ²)
d		diameter of shaft, m (in) diameter of cylinder, m (in)
E		modulus of elasticity, GPa (Mpsi)
E _c		modulus of elasticity of cast iron, GPa (Mpsi)
E _s		modulus of elasticity of steel, GPa (Mpsi)
F		force, kN [lbf or tonf (pound force or tonne force)]
l		length, m (in) length of hub, m (in) effective length of anchor, m (in)
L		original length of slot, m (in)
M _t		torque or twisting moment, Nm (lbf in)
P		pressure, MPa (psi)
P _c		contact pressure MPa (psi)
t		temperature, C ( F)
?		coefficient of linear expansion, (m/m)/ C [(in/in)/ F]
?		total change in diameter (interference), m (in)
? d		change in diameter, m (in)
?		Poisson's ratio
?		stress, MPa (psi)
?		coefficient of friction
n		factor of safety

^[1]Lingaiah, K., and B. R. Narayana Iyengar, Machine Design Data Handbook, Engineering College Cooperative Society, Bangalore, India, 1962.

^[2]Lingaiah, K., and B. R. Nardyana Iyengar, Machine Design Data Handbook, Vol. I, Suma Publishers, Bangalore, India, 1986.

^[3]Lingaiah,' K., Machine Design Data Handbook, Vol. II ( SI and Customary Metric Units), Suma Publishers, Bangalore, India, 1986.

a		axial
b		bearing surface
c		contact surface, compressive
d		design
f		final
h		hub
i

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