TOLERANCE TABLE FOR MOLDED RUBBER PRODUCTS DRAWING DESIGNATION "A1" (HIGH PRECISION)
"A1" is the tightest tolerance classification and should be reserved for those applications where high precision rubber products are a must. These products usually require expensive molds, fewer cavities per mold, and often, costly in-process to production procedures. Materials that require post curing generally do not lend themselves to Drawing Designation "A1" tolerances.
| Size of Dimension (mm) | Fixed | Closure | Size of Dimension (in) | Fixed | Closure | ||
| Above | Including | Tol. | Tol. | Above | Including | Tol. | Tol. |
| 0.0 | 10.0 | ±0.10 | ±0.13 | 0.00 | 0.40 | ±.004 | ±.005 |
| 10.0 | 16.0 | ±0.13 | ±0.16 | 0.40 | 0.63 | ±.005 | ±.006 |
| 16.0 | 25.0 | ±0.16 | ±0.20 | 0.63 | 1.00 | ±.006 | ±.008 |
| 25.0 | 40.0 | ±0.20 | ±0.25 | 1.00 | 1.60 | ±.008 | ±.010 |
| 40.0 | 63.0 | ±0.25 | ±0.32 | 1.60 | 2.50 | ±0.10 | ±.013 |
| 63.0 | 100.0 | ±0.32 | ±0.40 | 2.50 | 4.00 | ±0.13 | ±.016 |
| 100.0 | 160.0 | ±0.40 | ±0.50 | 4.00 | 6.30 | ±0.16 | ±.020 |