AGMA 9002-A86 Inch Bore and ANSI B17.1 Square Keyway Tolerances 3/8.3750 7/16.4375 Page 1 of 6. PFEIFER INDUSTRIES, LLC. Glass table tops enhance the interior effortlessly. Place your glass table top online orders at Glass Genius for the best quality custom glass table tops. 3- Special case for M6 from 250mm to 315mm tolerance. 4- Some internal Grade values must be rounded down to a precision of 3 decimal metric millimeter precision. Select between millimeters and inches the unit of measure the results will be displayed. All internal calculations are done using metric millimeters. The tolerance symbols that we use are in line with ISO 492 and ISO 199 and are explained in the previously mentioned tolerance tables and in table 12. The symbols normally refer to dimensional tolerances, only Kia, Kea, Sd, SD, Sia and Sea refer to geometrical tolerances.
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)
| Nominal Dimension | A1 | A2 | A3 | A4 |
| above | up to and
including | Fixed | Closure | Fixed | Closure | Fixed | Closure | Fixed | Closure |
| 0 | 10 | 0.1 | 0.13 | 0.16 | 0.2 | 0.2 | 0.32 | 0.32 | 0.8 |
| 10 | 16 | 0.13 | 0.16 | 0.2 | 0.25 | 0.25 | 0.4 | 0.4 | 0.9 |
| 16 | 25 | 0.16 | 0.2 | 0.2 | 0.32 | 0.32 | 0.5 | 0.5 | 1 |
| 25 | 40 | 0.2 | 0.25 | 0.32 | 0.4 | 0.4 | 0.63 | 0.63 | 1.12 |
| 40 | 63 | 0.25 | 0.32 | 0.4 | 0.5 | 0.5 | 0.8 | 0.8 | 1.25 |
| 63 | 100 | 0.32 | 0.4 | 0.5 | 0.63 | 0.63 | 1 | 1.1 | 1.4 |
| 100 | 160 | 0.4 | 0.5 | 0.63 | 0.8 | 0.8 | 1.25 | 1.25 | 1.6 |
160 & over
(Multiply by) | x .004 | x .005 | x .005 | x .008 | x .008 | x .010 |
Inch Tolerances (in)
| Nominal Dimension | A1 | A2 | A3 | A4 |
| above | up to and
including | Fixed | Closure | Fixed | Closure | Fixed | Closure | Fixed | Closure |
| 0 | 0.40 | 0.004 | 0.005 | 0.006 | 0.008 | 0.008 | 0.013 | 0.013 | 0.032 |
| 0.40 | 0.63 | 0.005 | 0.006 | 0.008 | 0.010 | 0.010 | 0.016 | 0.016 | 0.036 |
| 0.63 | 1.00 | 0.006 | 0.006 | 0.010 | 0.013 | 0.013 | 0.020 | 0.020 | 0.040 |
| 1.00 | 1.60 | 0.008 | 0.010 | 0.013 | 0.016 | 0.016 | 0.025 | 0.025 | 0.045 |
| 1.60 | 2.50 | 0.010 | 0.013 | 0.016 | 0.020 | 0.020 | 0.032 | 0.032 | 0.050 |
| 2.50 | 4.00 | 0.013 | 0.016 | 0.020 | 0.025 | 0.025 | 0.040 | 0.040 | 0.056 |
| 4.00 | 6.30 | 0.016 | 0.020 | 0.025 | 0.032 | 0.032 | 0.050 | 0.050 | 0.063 |
6.30 & over
(Multiply by) | x .004 | x .005 | x .005 | x .008 | x .008 | x .010 |
Table 12. Summary of RMA Drawing
Designations Extruded Rubber Products
| RMA Class | Dimensional Tolerance* Table 13 | CutLength Tolerance* Table 16 | SplicedLength Tolerance* Table 16 | MandrelCured* Table 20 |
| 1 | E1 | L1 | S1 | EN1 |
| 2 | E2 | L2 | S2 | EN2 |
| 3 | E3 | L3 | S3 | EN3 |
| 4 | – | – | – | – |
Table 13. Standard Cross-Sectional Tolerance
RMA Class |
| Drawing Designation | |
| Dimensions (in Millimeters) |
| Above | Up to and including | | 0 | 1.5 | | 1.5 | 2.5 | | 2.5 | 4.0 | | 4.0 | 6.3 | | 6.3 | 10 | | 10 | 16 | | 16 | 25 | | 25 | 40 | | 40 | 63 | | 63 | 100 |
|
| | +0.15 | +0.25 | +0.40 | | 0.20 | 0.35 | 0.50 | | 0.25 | 0.40 | 0.70 | | 0.35 | 0.50 | 0.80 | | 0.40 | 0.70 | 1.00 | | 0.50 | 0.80 | 1.30 | | 0.70 | 1.00 | 1.60 | | 0.80 | 1.30 | 2.00 | | 1.00 | 1.60 | 2.50 | | 1.30 | 2.00 | 3.20 |
|
RMA Class |
| Drawing Designation | |
| Dimensions (in Inches) |
| Above | Up to and including | | 0 | 0.06 | | 0.06 | 0.10 | | 0.10 | 0.16 | | 0.16 | 0.25 | | 0.25 | 0.39 | | 0.39 | 0.63 | | 0.63 | 0.98 | | 0.98 | 1.57 | | 1.57 | 2.48 | | 2.48 | 3.94 |
| | +0.006 | +0.010 | +0.015 | | 0.008 | 0.014 | 0.020 | | 0.010 | 0.016 | 0.027 | | 0.014 | 0.020 | 0.031 | | 0.016 | 0.027 | 0.039 | | 0.020 | 0.031 | 0.051 | | 0.027 | 0.039 | 0.063 | | 0.031 | 0.051 | 0.079 | | 0.039 | 0.063 | 0.098 | | 0.051 | 0.079 | 0.126 |
|
Table 16. Cut Length tolerance for unspliced extrusion
RMA Class |
| Drawing Designation. | |
| Length (in Millimeters) |
| Above | Up to and including | | 0 | 40 | | 40 | 63 | | 63 | 100 | | 100 | 160 | | 160 | 250 | | 250 | 400 | | 400 | 630 | | 630 | 1000 | | 1000 | 1600 | | 1600 | 2500 | | 2500 | 4000 | | 4000 |
| | +0.7 | +0.04 | +1.6 | | 0.08 | 1.3 | 2.0 | | 1.0 | 1.6 | 2.5 | | 1.3 | 2.0 | 3.2 | | 1.6 | 2.5 | 4.0 | | 2.0 | 3.2 | 5.0 | | 2.5 | 4.0 | 6.3 | | 3.2 | 5.0 | 10.0 | | 4.0 | 6.3 | 12.5 | | 5.0 | 10.0 | 16.0 | | 6.3 | 12.5 | 20.0 | | 0.16% | 0.32% | 0.50% |
|
| Length (in Inches) |
| Above | Up to and including | | 0 | 1.6 | | 1.6 | 2.5 | | 2.5 | 4.0 | | 4.0 | 6.3 | | 6.3 | 10.0 | | 10.0 | 16.0 | | 16.0 | 25.0 | | 25.0 | 40.0 | | 40.0 | 63.0 | | 63.0 | 100.0 | | 100.0 | 160.0 | | 160.0 |
| | +0.03 | +0.04 | +0.06 | | 0.03 | 0.05 | 0.08 | | 0.04 | 0.06 | 0.10 | | 0.05 | 0.08 | 0.13 | | 0.06 | 0.10 | 0.16 | | 0.8 | 0.13 | 0.20 | | 0.10 | 0.16 | 0.25 | | 0.13 | 0.20 | 0.40 | | 0.16 | 0.25 | 0.50 | | 0.20 | 0.40 | 0.63 | | 0.25 | 0.50 | 0.80 | | 0.16% | 0.32% | 0.50% |
|
Table 18. Spliced Length Tolerances
RMA
Class |
| Drawing Designation | |
| Millimeters |
| Above | Up to and including | | 0 | 250 | | 250 | 400 | | 400 | 630 | | 630 | 1000 | | 1000 | 1600 | | 1600 | 2500 | | 2500 | over |
| | +302 | +3.2 | +7.1 | | 4.0 | 7.1 | 8.0 | | 5.0 | 8.0 | 9.0 | | 6.3 | 9.0 | 10.0 | | 8.0 | 10.0 | 11.2 | | 10.0 | 11.2 | 12.3 | | 012.5 | 12.5 | 16.0 |
|
| Inches |
| Above | Up to and including | | 0 | 10 | | 10 | 16 | | 16 | 25 | | 25 | 40 | | 40 | 63 | | 63 | 100 | | 100 | over |
| | +.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 | |
Nominal Dimensions
(in Millimeters) |
| Above | Up to and including | | 0 | 4 | | 4 | 6.3 | | 6.3 | 10 | | 10 | 16 | | 16 | 25 | | 25 | 40 | | 40 | 63 | | 63 | 100 | | 100 | 160 | | 160 |
| | +0.20 | +0.20 | +0.35 | | 0.20 | 0.25 | 0.40 | | 0.25 | 0.35 | 0.50 | | 0.35 | 0.40 | 0.70 | | 0.40 | 0.50 | 0.80 | | 0.50 | 0.70 | 1.00 | | 0.70 | 0.80 | 1.30 | | 0.80 | 1.00 | 1.60 | | 1.00 | 1.30 | 2.00 | | 0.6% | 0.8% | 1.2% |
|
Nominal Dimensions
(in Inches) |
| Above | Up to and including | | 0 | 0.16 | | 0.16 | 0.25 | | 0.25 | 0.40 | | 0.40 | 0.63 | | 0.63 | 1.00 | | 1.00 | 1.60 | | 1.60 | 2.50 | | 2.50 | 4.00 | | 4.00 | 6.30 | | 6.30 |
| | +0.008 | +0.08 | +0.014 | | 0.008 | 0.010 | 0.016 | | 0.010 | 0.014 | 0.020 | | 0.014 | 0.016 | 0.028 | | 0.016 | 0.020 | 0.032 | | 0.020 | 0.028 | 0.040 | | 0.028 | 0.032 | 0.051 | | 0.032 | 0.040 | 0.063 | | 0.040 | 0.051 | 0.079 | | 0.6% | 0.8% | 1.2% |
|
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