Product Tolerances - Rubber Extrusions

Our rubber extrusion products are produced within industry-accepted tolerance levels to compensate for variations within separate production batches.

Our extrusions are covered by the standard ISO 3302-1, which separates the tolerance levels into three classes, from E1 (which are the tightest) to E3 (which are the widest).

Cut lengths of our extruded rubber products are also covered by ISO-3302-1 to cater for variations in profile and operation. In the case of cut lengths there are also three classes, from L1 (which are the tightest) to L3 (which are the widest).

Full information on each class and their respective tolerances can be seen below:

ISO 3302-1 Tolerance Table – Extruded Rubber

Nominal Dimension (mm)		Class E1 ±	Class E2 ±	Class E3 ±
Above	Up to and including	Class E1 ±	Class E2 ±	Class E3 ±
0	1.5	0.15	0.25	0.40
1.5	2.5	0.20	0.35	0.50
2.5	4	0.25	0.40	0.70
4	6.3	0.35	0.50	0.80
6.3	10	0.40	0.70	1.00
10	16	0.50	0.80	1.30
16	25	0.70	1.00	1.60
25	40	0.80	1.30	2.00
40	63	1.00	1.60	2.50
63	100	1.30	2.00	3.20
100		1.3%	2%	3.2%

ISO 3302-1 Tolerance Table – Rubber Cut Lengths

Nominal Dimension (mm)		Class L1 ±	Class L2 ±	Class L3 ±
Above	Up to and including	Class L1 ±	Class L2 ±	Class L3 ±
0	40	0.70	1.00	1.60
40	63	0.80	1.30	2.00
63	100	1.00	1.60	2.50
100	160	1.30	2.00	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		0.16%	0.32%	0.5%