5 TYPES OF TOLERANCES
- FORM
- PROFILE
- ORIENTATION
- POSITION
- RUNOUT
TYPES OF FORM TOLERANCE
- FLATNESS
- CYLINDRICITY
- CIRCULARITY
- STRAIGHTNESS
TOLERANCE ZONE FOR FLATNESS
2 PARALLEL PLANES
T.Z FOR STRAIGHTNESS
2 PARALLEL LINES
T.Z FOR CYLINDRICITY
2 CONCENTRIC CYLINDER
T.Z CIRCULARITY
2 CONCENTRIC CIRCLE
FOR FORM TOLERANCE :
1 DATUM?
2. MMC AND LMC
- DATUM NOT REQUIRED
- MMC AND LMC NOT REQUIRED
* ** EXCEPTION ALLOWED FOR FEATURE OF SIZE***
FOS WITH STRAIGHTNESS
TZ?
SYMBOL
DERIVED MEDIAN LINE
CYLINDRICAL TOLERANCE ZONE
FLATNESS SYMBOL WITH ‘M’
FOS WITH FLATNESS
DERIVED MEDIAN PLANE
PLANAR TOLERNACE
TYPES OF PROFILE TOL
PROFILE OF LINE AND SURFACE
PROFILE OF LINE
TZ
UNIFORM LINEAR BOUNDARY LAYER ABOUT TRUE PROFILE
PROFILE OF SURFACE
TZ
UNIFORM SURFACE BOUNDARY LAYER ABOUT TRUE PROFILE
RULES FOR PROFILE TOLERANCE
DATUM
MMC / LMC
DATUM OPTIONAL
MMC / LMC NOT REQUIRED
LOCATION TOLERANCE TYPES
RULES
DATUM
MMC LMC
TRUE POSITION CONCENTRICITY SYMMETRIC DATUM REQUIRED MMC LMC MAY BE USED
TZ FOR
- TRUE POSITION
- TRUE POSITION WITH MMC
- CONCENTRICITY
- SYMMETRIC
- CIRCLE
- CYLINDER
- * CONCENTRICITY IS ALWAYS USED WITH FOS*
CYLINDRICAL TZ - SYMMETRIC IS ALSO USED WITH FOS
2 PARALLEL PLANES TZ
ORIENTAION TYPES
ANGLE
PERPENDICULAIRY
PARALLISIM
ORIENTAION
DATUM
MMC / LMC
- DATUM MUST
2. MMC LMC MAY BE REQUIRED
TZ FOR :
PARALLISM
ANGLE
PERPENDICULARITY
- 2 PARALLEL PLANES
- 2 PARALLEL PLANES
- 2 PARALLEL PLANES (IF SURFACE)
- ** CYLINDER TZ IF FOS.***
RUNOUT TYPES AND TZ
CIRCULAR RUNOUT
TZ= 2 CONCENTRIC CIRCLE
TOTAL RUNOUT
TZ= 2 CONCENTRIC CYLINDER
