Tolerances Achieved at Walker Rubber
Table 1 shows the rubber moulding tolerances that we work to here at Walker Rubber. These tolerances have been taken from the international standard ISO 3302-1:2014 Rubber — Tolerances for products — Part 1: Dimensional tolerances.
Table 1: Moulded rubber tolerances – ISO 3302.
| Nominal dimension (mm) | M1, ± (mm) | M2, ± (mm) | M3, ± (mm) | M4, ± (mm) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Over | Up to and including | F | C | F | C | F | C | F & C | |
| 0 | 4.0 | 0.08 | 0.10 | 0.10 | 0.15 | 0.25 | 0.40 | 0.50 | |
| 4.0 | 6.3 | 0.10 | 0.12 | 0.15 | 0.20 | 0.25 | 0.40 | 0.50 | |
| 6.3 | 10 | 0.10 | 0.15 | 0.20 | 0.20 | 0.30 | 0.50 | 0.70 | |
| 10 | 16 | 0.15 | 0.20 | 0.20 | 0.25 | 0.40 | 0.60 | 0.80 | |
| 16 | 25 | 0.20 | 0.20 | 0.25 | 0.35 | 0.50 | 0.80 | 1.00 | |
| 25 | 40 | 0.20 | 0.25 | 0.35 | 0.40 | 0.60 | 1.00 | 1.30 | |
| 40 | 63 | 0.25 | 0.35 | 0.40 | 0.50 | 0.80 | 1.30 | 1.60 | |
| 63 | 100 | 0.35 | 0.40 | 0.50 | 0.70 | 1.00 | 1.60 | 2.00 | |
| 10 | 160 | 0.40 | 0.50 | 0.70 | 0.80 | 1.30 | 2.00 | 2.50 | |
| 160 | - | 0.3% | 0.4% | 0.5% | 0.7% | 0.8% | 1.3% | 1.5% | |
F = Fixed dimensions; dimensions created by features on the same part of the tool
C = Closure dimensions; dimensions that are created across two mating parts of a tool and therefore more prone to variation.