La Rubber Manufacturers Association (RMA) a développé des tableaux de tolérances afin de permettre aux utilisateurs et aux fournisseurs de toutes les industries de communiquer. Ces tableaux sont utiles lors de la conception et de la production d’une pièce. Vous pouvez également consulter l’article de la RMA sur les facteurs qui touchent les tolérances de produits de caoutchouc moulé.
Tolérance métrique (mm)
Dimension nominale |
A1 |
A2 |
A3 |
A4 |
Au-dessus de |
Jusqu’à et
incluant |
Fixe |
Fermeture |
Fixe |
Fermeture |
Fixe |
Fermeture |
Fixe |
Fermeture |
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 & plus
(Multiplié par) |
|
|
x .004 |
x .005 |
x .005 |
x .008 |
x .008 |
x .010 |
Tolérance pouces (po)
Dimension nominale |
A1 |
A2 |
A3 |
A4 |
Au-dessus de |
Jusqu’à et
incluant |
Fixe |
Fermeture |
Fixe |
Fermeture |
Fixe |
Fermeture |
Fixe |
Fermeture |
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 & plus
(Multiplié par) |
|
|
x .004 |
x .005 |
x .005 |
x .008 |
x .008 |
x .010 |
Table 12. Summary of RMA Drawing
Designations Extended 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 |
1 – High Precision
|
2 – Precision
|
3 – Commercial
|
|
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 |
1 – High Precision |
2 – Precision |
3 – Commercial |
|
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
|
1 – HighPrecision |
2 – Precision |
3 – Commercial |
|
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
|
1 – High Precision |
2 – Precision |
3 – Commercial |
|
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 |
1 – High Precision |
2 – Commercial |
3 – Non-Critical |
|
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% |
|