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Extrusion Tolerances

Standard cross-sectional dimensional tolerances

The following are standard tolerances on cross-sectional dimensions for rubber extrusions that are manufactured ‘in-house’

Nominal dimension (mm)		Tolerance ± (mm)	Note:-
above	Up to	Tolerance ± (mm)	Note:-
0	2.50	0.5	Tolerances shown can be disposed differently if required. But total tolerance remains as stated to left (subject to negotiation) e.g. ± 0.5 could be +0 -1.0 or +1.0 – 0 etc.
2.50	4.00	0.7
4.00	6.30	1.0
6.30	10.00	1.5
10.00	16.00	2.0
16.00	25.00	2.5
25.00	40.00	3.0
40.00	63.00	3.5
63.00	160.00	5.0

Tolerances closer than those shown above may be possible, particularly at the smaller end. If these are required, the Customer must indicate at the enquiry stage, the dimensions involved and the tolerances required.

Standard tolerances on length

The following are standard tolerances on length for rubber extrusions that are manufactured ‘in-house’

Length	Material
	EPDM (Standard Grade)		EPDM (Special Grades), Neoprene, Nitrile, Natural
	Finished Cured Tolerance	Maximum Cured Length	Finished Cured Tolerance	Maximum Cured Length
0 to 1m	-0 +25 mm	1.025m	-0 +50 mm	1.05m
1 to 2m	-0 +50 mm	2.05m	-0 +75mm	2.075m
2 to 3m	-0 +75 mm	3.075m	-0 +100mm	3.1m
3 to 4m	-0 +80 mm	4.08m	-0 +130mm	4.13m
4 to 5m	-0 +100 mm	5.1m	-0 +160mm	5.16m
5 to 6m	-0 +120 mm	6.12m	-0 +160mm	6.16m
6 to 7m	-0 +140 mm	7.14m	-0 +200mm	7.2m
7 to 8m	-0 +160 mm	8.16m	-0 +210mm	8.21m
8 to 9m	-0 +180 mm	9.18m	-0 +210mm	9.21m
9 to 10m	-0 +200 mm	10.2m	-0 +250mm	10.25m
Over 10m	-0 +350 mm	10.35m	-0 +400mm	10.4m

Norwich: Last House, 21-23 Burnet Road, Sweetbriar Ind. Estate,
Norwich, Norfolk, NR3 2BS
Tel: 01603 487371 Sales, 01603 415044 Manufacturing, 01603 415045 Fabrication
Fax: 01603 406502 All Depts.

Ipswich: 22 Farthing Road, Sproughton, Ipswich, Suffolk, IP1 5AP
Tel: 01473 749131, Fax: 01473 240917