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

  1. APPLIES OVER THE ENTIRE
    SURFACE
  2. 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.