Tolerance Table In Inch

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  1. Feb 08, 2015 select Hole and Shaft class using radio buttons to the left and right in 'reference table window' if the tolerance does not appear in the 'reference table window'. Use filter window to make it visible; Click 'Calculate' button for results The calculator windows. Unit selection: mm or inch - All calculations are in millimeters internally.
  2. Mechanical Tolerance Standards Charts Geometric Boundaries II GD&T Reference Book. The following links are to General Tolerance Table Charts for Standard Shaft Hole Fits per McDonald Douglas Design Guide 'Machining Tolerances'. The size ranges given are for typical size ranges utilized within industry.

The Rubber Manufacturers Association (RMA) has developed tolerance tables with ranges to provide communication between user and provider across a wide range of industries. These are helpful when designing and producing a part. You can also consult the RMA article on factors affecting tolerances of molded rubber products.

  • RMA Molded Tolerances
  • RMA Extrusion Tolerances
    • Table 12.
      Summary of RMA Drawing Designations Extruded Rubber Products
    • Table 13.
      Standard Cross-Sectional Tolerance
    • Table 16.
      Cut Length tolerance for unspliced extrusion
    • Table 18.
      Spliced Length Tolerances
    • Table 20.
      Tolerances on Internal Dimensions of Mandrel-Supported Extrusions

Metric Tolerances (mm)

Table 4-3 of Storm Drain Handbook – August 2000 Values are based on 2 inches of construction tolerance, structures with 8-inch walls and concrete pipe dimensions. Use Round Structure or Rearrange Pipes if these Angles are Exceeded. MAXIMUM ANGLE (SKEW) INTO A RECTANGULAR STRUCTURE.

Nominal DimensionA1A2A3A4
aboveup to and
including		FixedClosureFixedClosureFixedClosureFixedClosure
0100.10.130.160.20.20.320.320.8
10160.130.160.20.250.250.40.40.9
16250.160.20.20.320.320.50.51
25400.20.250.320.40.40.630.631.12
40630.250.320.40.50.50.80.81.25
631000.320.40.50.630.6311.11.4
1001600.40.50.630.80.81.251.251.6
160 & over
(Multiply by)		x .004x .005x .005x .008x .008x .010

Inch Tolerances (in)

Nominal DimensionA1A2A3A4
aboveup to and
including		FixedClosureFixedClosureFixedClosureFixedClosure
00.400.0040.0050.0060.0080.0080.0130.0130.032
0.400.630.0050.0060.0080.0100.0100.0160.0160.036
0.631.000.0060.0060.0100.0130.0130.0200.0200.040
1.001.600.0080.0100.0130.0160.0160.0250.0250.045
1.602.500.0100.0130.0160.0200.0200.0320.0320.050
2.504.000.0130.0160.0200.0250.0250.0400.0400.056
4.006.300.0160.0200.0250.0320.0320.0500.0500.063
6.30 & over
(Multiply by)		x .004x .005x .005x .008x .008x .010

Table 12. Summary of RMA Drawing
Designations Extruded Rubber Products

RMA ClassDimensional Tolerance* Table 13CutLength Tolerance* Table 16SplicedLength Tolerance* Table 16MandrelCured* Table 20
1E1L1S1EN1
2E2L2S2EN2
3E3L3S3EN3
4––––

Table 13. Standard Cross-Sectional Tolerance

RMA Class

Drawing Designation
E1E2E3
Dimensions (in Millimeters)
AboveUp to and including
01.5
1.52.5
2.54.0
4.06.3
6.310
1016
1625
2540
4063
63100

+0.15+0.25+0.40
0.200.350.50
0.250.400.70
0.350.500.80
0.400.701.00
0.500.801.30
0.701.001.60
0.801.302.00
1.001.602.50
1.302.003.20

RMA Class

Drawing Designation
E1E2E3
Dimensions (in Inches)
AboveUp to and including
00.06
0.060.10
0.100.16
0.160.25
0.250.39
0.390.63
0.630.98
0.981.57
1.572.48
2.483.94
+0.006+0.010+0.015
0.0080.0140.020
0.0100.0160.027
0.0140.0200.031
0.0160.0270.039
0.0200.0310.051
0.0270.0390.063
0.0310.0510.079
0.0390.0630.098
0.0510.0790.126

Table 16. Cut Length tolerance for unspliced extrusion

RMA Class

Drawing Designation.
L1L2L3
Length (in Millimeters)
AboveUp to and including
040
4063
63100
100160
160250
250400
400630
6301000
10001600
16002500
25004000
4000
+0.7+0.04+1.6
0.081.32.0
1.01.62.5
1.32.03.2
1.62.54.0
2.03.25.0
2.54.06.3
3.25.010.0
4.06.312.5
5.010.016.0
6.312.520.0
0.16%0.32%0.50%
Length (in Inches)
AboveUp to and including
01.6
1.62.5
2.54.0
4.06.3
6.310.0
10.016.0
16.025.0
25.040.0
40.063.0
63.0100.0
100.0160.0
160.0
+0.03+0.04+0.06
0.030.050.08
0.040.060.10
0.050.080.13
0.060.100.16
0.80.130.20
0.100.160.25
0.130.200.40
0.160.250.50
0.200.400.63
0.250.500.80
0.16%0.32%0.50%

Table 18. Spliced Length Tolerances

RMA
Class

Drawing Designation
S1S2S3
Millimeters
AboveUp to and including
0250
250400
400630
6301000
10001600
16002500
2500over
+302+3.2+7.1
4.07.18.0
5.08.09.0
6.39.010.0
8.010.011.2
10.011.212.3
012.512.516.0
Inches
AboveUp to and including
010
1016
1625
2540
4063
63100
100over
+.13+.25+.28
.16.28.32
.20.32.36
.25.36.40
.32.40.45
.40.45.50
.50.50.53

Table 20. Tolerances on Internal Dimensions
of Mandrel-Supported Extrusions

RMA
Class

Drawing Designation
EN1EN2EN3
Nominal Dimensions
(in Millimeters)
AboveUp to and including
04
46.3
6.310
1016
1625
2540
4063
63100
100160
160
+0.20+0.20+0.35
0.200.250.40
0.250.350.50
0.350.400.70
0.400.500.80
0.500.701.00
0.700.801.30
0.801.001.60
1.001.302.00
0.6%0.8%1.2%
Nominal Dimensions
(in Inches)
AboveUp to and including
00.16
0.160.25
0.250.40
0.400.63
0.631.00
1.001.60
1.602.50
2.504.00
4.006.30
6.30
+0.008+0.08+0.014
0.0080.0100.016
0.0100.0140.020
0.0140.0160.028
0.0160.0200.032
0.0200.0280.040
0.0280.0320.051
0.0320.0400.063
0.0400.0510.079
0.6%0.8%1.2%
Tolerance Table In Inch

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