0.8

1.6

3.2

6.3

12.5

25

50

100

0.1
−S

0.2
−S

0.4
−S

0.8
−S

1.6
−S

3.2
−S

6.3
−S

12.5
−S

25
−S

50
−S

100
−S

200
−S

■Types and symbols of geometrical tolerances

400
−S

Standard value of reference length
（mm）

0.25

0.8

2.5

8

Type of tolerance
Straightness
tolerance

25

Finishing symbol

−

Forging
Casting

Flatness tolerance

Fine
Fine

Shape tolerances

Die casting
Hot rolling
Cold rolling
Drawing

Circularity tolerance Cylindricity tolerance Extruding

Symbol

Definition of tolerance range

Tumbling

Profile tolerance of line

Sandblasting
Rolling
Fine

Carving
（including slotting）

Machining methods

Precision boring
Fine

Filing
Fine

Round grinding

High

Medium

Rough

Fine

Boring
Drilling
Reaming

Fine

Broach grinding

Orientation tolerances

Fine

Milling

Parallelism tolerance Perpendicularity tolerance Angularity tolerance Fine

Shaving
Medium

Fine

Hone finishing
Super finishing

High

Fine

Buffing

Fine

Paper finishing

Fine

Lapping

Rough

Positional tolerances

Fine

Grinding

Positional tolerance Fine

Symmetry

Fine

Liquid honing

Coaxiality tolerance or concentricity tolerance Surface rolling
Electric discharge carving
WEDM
（Wire electric discharge machining）
Fine

Chemical polishing
Electrolytic abrasion

Circular run-out tolerance t t tt tt t ttt tt ttt t tt t t t t t t t tt t ttt t t ttt t

The tolerance range in the considered plane is the area between two concentric circles separated by distance t.
The tolerance range is the range contained between two coaxial cylinder surfaces separated by distance t.

The tolerance range is the range contained between the two envelope