Because of rubber's variability from lot to lot, rubber manufacturers uses these tolerances (available in Imperial [English] or Metric units) in order to ensure part conformity.
Toerance Tables are courtesy of the Rubber Manufacturer's Association (RMA). For more information, please visit their website at www.rma.org.
| RMA CLASS | 1 | 2 | 3 | |
| High Precision | Precision | Commercial | ||
| Dim. (in) | Dwg. Designation | E1 | E2 | E3 |
| Above | Up To | +/- | +/- | +/- |
| .000 | .060 | .006 | .010 | .015 |
| .060 | .100 | .008 | .014 | .020 |
| .100 | .160 | .010 | .016 | .027 |
| .160 | .250 | .014 | .020 | .031 |
| .250 | .390 | .016 | .027 | .039 |
| .390 | .630 | .020 | .031 | .051 |
| .630 | .980 | .027 | .039 | .063 |
| .980 | 1.570 | .031 | .051 | .079 |
| 1.570 | 2.480 | .039 | .063 | .098 |
| 2.480 | 3.940 | .051 | .079 | .126 |
| RMA CLASS | 1 | 2 | 3 | |
| High Precision | Precision | Commercial | ||
| Dim. (in) | Dwg. Designation | E1 | E2 | E3 |
| Above | Up To | +/- | +/- | +/- |
| .00 | 1.50 | .15 | .25 | .40 |
| 1.50 | 2.50 | .20 | .35 | .50 |
| 2.50 | 4.00 | .25 | ..40 | .70 |
| 4.00 | 6.30 | .35 | .50 | .80 |
| 6.30 | 10.00 | .40 | .70 | 1.00 |
| 10.00 | 16.00 | .50 | .80 | 1.30 |
| 16.00 | 25.00 | .70 | 1.00 | 1.60 |
| 25.00 | 40.00 | .80 | 1.30 | 2.00 |
| 40.00 | 63.00 | 1.00 | 1.60 | 2.50 |
| 63.00 | 100.00 | 1.30 | 2.00 | 3.20 |
| RMA CLASS | 1 | 2 | 3 | |
| High Precision | Precision | Commercial | ||
| Dim. (in) | Dwg. Designation | L1 | L2 | L3 |
| Above | Up To | +/- | +/- | +/- |
| .00 | 1.60 | .030 | .040 | .060 |
| 1.60 | 2.50 | .030 | .050 | .080 |
| 2.50 | 4.00 | .040 | .060 | .100 |
| 4.00 | 6.30 | .050 | .080 | .130 |
| 6.30 | 10.00 | .060 | .100 | .160 |
| 10.00 | 16.00 | .080 | .130 | .200 |
| 16.00 | 25.00 | .100 | .160 | .250 |
| 25.00 | 40.00 | .130 | .200 | .400 |
| 40.00 | 63.00 | .160 | .250 | .500 |
| 63.00 | 100.00 | .200 | .400 | .630 |
| 100.00 | 160.00 | .250 | .500 | .800 |
| 160.00+ | .16% | .32% | .50% |
| RMA CLASS | 1 | 2 | 3 | |
| High Precision | Precision | Commercial | ||
| Dim. (in) | Dwg. Designation | L1 | L2 | L3 |
| Above | Up To | +/- | +/- | +/- |
| 0 | 40 | .70 | 1.00 | 1.60 |
| 40 | 63 | .80 | 1.30 | 2.00 |
| 63 | 100 | 1.00 | 1.60 | 2.50 |
| 100 | 160 | 1.30 | 2.20 | 3.20 |
| 160 | 250 | 1.60 | 2.50 | 4.00 |
| 250 | 400 | 2.00 | 3.20 | 5.00 |
| 400 | 630 | 2.50 | 4.00 | 6.30 |
| 630 | 1000 | 3.20 | 5.00 | 10.00 |
| 1000 | 1600 | 4.00 | 6.30 | 12.50 |
| 1600 | 2500 | 5.00 | .10.00 | 16.00 |
| 2500 | 4000 | 6.30 | 12.50 | 20.00 |
| 4000+ | .16% | .32% | .50% |
This section includes information on how seals are constructed, the various design configurations to employ when specifying your product, what an inflatable sealing gap is, corner and end details, along with available air connector types.
