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¯1.6 t¯3 t¯6 t¯12

t¯1.6 1.6< t¯3 6< t¯123< t¯6

¯3 t¯6 t¯12

11761175

( )

Excerpt from JIS B 0408/0410(1991) Excerpt from JIS B 0405/0419(1991)GENERAL DIMENSIONAL TOLERANCEGENERAL DIMENSIONAL TOLERANCES FOR PARTS FORMED BY PRESS WORKING FROM SHEET METAL AND SHEAR FROM METAL PLATES

TECHNICAL DATA TECHNICAL DATA

Table 1. General dimensional tolerance of blanking Unit:mm

1. General dimensional tolerances for parts formed by press working from sheet metal

Basic size stepGrades

Grade A Grade B Grade C

Over 1000 to 2000 incl.




Over 6 to 30 incl.

6 or less

Note: Grade A, B and C are equal to tolerance grade f, m and c of JIS B 0405 respectively.

Unit:mmTable 2. adimensional tolerance of bending and drawing

Grade C Grade BGrade A

GradesBasic size step





Over 6 to 30 incl.

6 or less

Grade A, B and C are equal to tolerance grade m, c and v of JIS B 0405 respectively.

Note:

2. General tolerances for parts formed by shear from metal plates

Table 1. General dimaensional tolerance of cut width Unit:mm

Unit:mmTable 2. General tolerance of straightness






30 or less






30 or less

Basic size step

Nominal length oncut dimension

Grade A Grade B Grade A Grade B Grade A Grade B Grade A Grade B

Board thickness(t)

Grades

Grades

Board thickness(t)

Grade B Grade AGrade B Grade AGrade BGrade AGrade BGrade A

Grade A Grade B Grade A Grade B Grade A Grade B

Board thickness(t)

Grades

Unit:mmTable 3. General tolerance of perpendicularity

Nominal length on shorter side






30 or less

1. General dimensional tolerance of cutting

Unit:mmLength dimensional tolerance (excluding chamfered parts)

3. Tolerance of angle dimension

Unit:mm

2. Length dimensional tolerance in chamfered parts (corner roundness or chamfer dimension)

Unit:mm

Degree Basic size step

Symbol Explanation

0.5 to

3 incl.

Over 30 to

120 incl.

Over 6 to

30 incl.

Over 3 to

6 incl.

Tolerance

Over 2000 to

4000 incl.

Over 1000 to

2000 incl.

Over 400 to

1000 incl.

Over 120 to

400 incl.

Coarse

Very coarse

Medium

Fine

1Note( ):Tolerance for standard dimensions of less than 0.5mm shall be specified individually.

Degree Basic size step

Symbol

Shorter side of cornerDegree

Symbol ExplanationExplanation

Fine

Medium

Coarse

Very coarse

Fine

Medium

Coarse

Very coarse

0.5 ( ) to

3 incl.

1 Over 3 to

6 incl.Over 6

Over 10 to

50 incl.

Over 50 to

120 incl.

Over 120 to

400 incl.10 or less

Note( ):Tolerance for standard dimensions of less

than 0.5mm shall be specified individually.

1

Over 400

4. General tolerance of perpendicularityUnit:mmJIS B 0419-1991

Over 300 to

1000 incl.

Over 100 to

300 incl.

Over 1000 to

3000 incl.100 or lessDegree

Nominal length on shorter side

Perpendicularity tolerance

Nominal area

Degree

5. General tolerance of straightness and flatnessUnit:mmJIS B 0419-1991


10 or less Over 10 to 30 incl.




Straightness and flatness tolerance

JIS B 0408

JIS B 0410 -1991

-1991

ToleranceTolerance

-1991JIS B 0405

PD-8 1st

gdt

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