CYLINDRICITY

TYPE OF TOLERANCE	CHARACTERISTIC AND SYMBOL	DATUM REFERENCE	IMPLIED CONDITION	ALLOWABLE MATERIAL MODIFIERS	TOLERANCE ZONE SHAPE	KEY POINTS TO REMEMBER
FORM	CYLINDRICITY	NONE	RFS	NONE	TOTAL WIDTH TOLERANCE ZONE BETWEEN TWO CONCENTRIC CYLINDERS	APPLIES OVER THE ENTIRE SURFACE IS LIKE A FLATNESS TOLERANCE ZONE CURLED AROUND A CYLINDER EXPENSIVE

CYLINDRICITY:
A condition of a surface of revolution in which all points of the surface are equidistant from a common axis.

CYLINDRICITY TOLERANCE ZONE:
Defined by two concentric cylinders within which the surface must lie.