Silicone Rubber Product’s Tolerance Chart

TABLE 13 – Metric Tolerance

RMA Class

1
High Precision

2
Precision

3
Commercial

Drawing Designations

E1

E2

E3

Dimensions(in Millimeters)

Above

Up To

+

+

+

0

1.5

0.15

0.25

0.40

1.5

2.5

0.20

0.35

0.50

2.5

4.0

0.25

0.40

0.70

4.0

6.3

0.35

0.50

0.80

6.3

10

0.40

0.70

1.00

10

16

0.50

0.80

1.30

16

25

0.70

1.00

1.60

25

40

0.80

1.30

2.00

40

63

1.00

1.60

2.50

63

100

1.30

2.00

3.20

TABLE 13 – English Tolerance

RMA Class

1
High Precision

2
Precision

3
Commercial

Drawing Designations

E1

E2

E3

Dimensions(in Inches)

Above

Up To

+

+

+

0

0.060

0.006

0.010

0.015

0.060

0.10

0.008

0.014

0.020

0.10

0.16

0.010

0.016

0.027

0.16

0.25

0.014

0.020

0.031

0.25

0.39

0.016

0.027

0.039

0.39

0.63

0.020

0.031

0.051

0.63

0.98

0.027

0.039

0.063

0.98

1.57

0.031

0.051

0.079

1.57

2.48

0.039

0.063

0.098

2.48

3.94

0.051

0.079

0.126

Table 16 – Metric Tolerance

RMA Class

1
(Precision)

2
(Commercial)

3
(Non-Critical)

Drawing Designations

L1

L2

L3

Length(in Millimeters)

Above

Up To

+

+

+

0

40

0.7

1.0

1.6

40

63

0.80

1.3

2.0

63

100

1.0

1.6

2.5

100

160

1.3

2.0

3.2

160

250

1.6

2.5

4.0

250

400

2.0

3.2

5.0

400

630

2.5

4.0

6.3

630

1000

3.2

5.0

10.0

1000

1600

4.0

6.3

12.5

1600

2500

5.0

10.0

16.0

2500

4000

6.3

12.5

20.0

4000

0.16%

0.32%

0.50%

Table 16 – English Tolerance

Length(in Inches)

Above

Up To

+

+

+

0

1.6

0.03

0.04

0.06

1.6

2.5

0.03

0.05

0.08

2.5

4.0

0.04

0.06

0.10

4.0

6.3

0.05

0.08

0.13

6.3

10.0

0.06

0.10

0.16

10.0

16.0

0.08

0.13

0.20

16.0

25.0

0.10

0.16

0.25

25.0

40.0

0.13

0.20

0.40

40.0

63.0

0.16

0.25

0.50

63.0

100.0

0.20

0.40

0.63

100.0

160.0

0.25

0.50

0.80

160.0

0.16%

0.32%

0.50%