Dimensions (mm)

Units 0.001mm

Grade A

Grade B

Caliper measurements for individual parallels

Functional Requirements

Caliper measurements for individual parallels

Functional Requirements

Individual

Pairs

Individual

Pairs

Thickness T

Width W

LengthL

Departure from Nominal T & W

Variation in Caliper Measurements of T & W

Parallelism of T & W

Matching

Departure from Nominal T & W

Variation in Caliper Measurements of T & W

Parallelism of T & W

Matching

5

10

100

±5

2

4

6

±10

4

8

12

10

20

125

±5

2

4

6

±10

4

8

12

15

30

150

±5

2

4

6

±10

4

8

12

20

40

200

±5

2

4

6

±10

4

8

12

25

50

250

±10

3

6

10

±20

6

12

20

30

60

300

±10

3

6

10

±20

6

12

20

40

80

350

-

-

-

-

±25

7

14

20

50

100

400

-

-

-

-

±30

8

16

25

Dimensions (inches)

Units 0.000 1inch

Grade A

Grade B

Maximum Permissible Errors for Each Parallel

A pair of Parallels shall have equal Thickness (T) and Width (W) to within

Maximum Permissible Errors for Each Parallel

A pair of Parallels shall have equal Thickness (T) and Width (W) to within

Thickness T

Width W

LengthL
(Minimum)

Tolerance on T&W

Variations in T&W Not to Exceed

Error in Straightness within

Tolerance on T&W

Variations in T&W Not to Exceed

Error in Straightness within

¼

½

4

±1.0

0.5

±0.5

0.5

±2.5

1.0

±1.0

1.0

⅜

¾

6

±1.0

1.0

±1.0

1.0

±2.5

1.5

±1.5

1.5

½

1

6

±1.0

1.0

±1.0

1.0

±2.5

1.5

±1.5

1.5

¾

1½

8

±1.5

1.5

±1.5

1.5

±4.0

2.0

±2.0

2.0

1

2

10

±1.5

1.5

±1.5

1.5

±4.0

2.5

±2.5

2.5

1¼

2½

10

±2.0

1.5

±1.5

1.5

±5.0

2.5

±2.5

2.5

1½

3

12

±2.0

2.0

±2.0

2.0

±5.0

3.0

±3.0

3.0

1¾

3½

14

-

-

-

-

±6.0

3.5

±3.5

3.5

2

4

16

-

-

-

-

±6.0

4.0

±4.0

4.0