Washers

Washers, ideal discs for loads tightening

Square or rectangular section washers are an optimum alternative to o-rings as they afford a greater sealing surface and they can work with high pressures and loads. Under normal working conditions, in other words, within the elastic limits of the rubber and the recommended speed so that the material does not overheat, rubber washers allow optimum sealing to be ensured, even when the contact surfaces are in motion.

These are some of the advantages of JIOrings washers:

  • Tight tolerances particularly as regards thickness.
  • Excellent Price/quality ratio particularly for medium-sized and large series.
  • Smooth finish of the surface and the edges.
  • No investment in mould for the most standard sizes.

We have provided more information about the washers if you wish to learn more about them. And, of course, not forgetting you can request an estimate or purchase from our online store, available 24 hours a day.

Washers, product details

Materials Hardness [SH A] Color
ACM 50-90 Black
AFLAS® 70-90 Black
BUTYL® 50-90 Black, Blue
CR 40-90 Black, Gray, Green, Red, Yellow, White
EPDM 40-90 Black, Blue, Gray, Green, Brown, Red, Purple, Orange, Yellow, White, Beige
FPM 60-90 Black, Blue, Gray, Green, Brown, Red, Purple, Orange, Yellow, White, Beige
FVMQ 40-90 Black, Blue, Red, White
HNBR 50-90 Black, Blue, Green, Brown, Red, Yellow
NBR 40-90 Black, Blue, Gray, Green, Brown, Red, Purple, Orange, Yellow, White, Beige
NR 40-90 Black, Red
PU 50-90 Black, Blue, Green, Red, Yellow, White, Translucent
VMQ 30-90 Black, Blue, Gray, Green, Brown, Red, Purple, Orange, Yellow, White, Beige, Translucent
SBR 40-90 Black

On request, we can offer compounds adapted to specific requirements such as, for example, food stuff and drinking water compounds.

Tolerances regarding diameters

Nominal Diameter (mm) Interior (mm) Exterior (mm)
EN2 EN1 EG2 EG1
From Up to Standard tolerances Low tolerances Standard tolerances Low tolerances
6,30 10 0,35 0,25 0,25 0,15
10 16 0,40 0,35 0,35 0,20
16 25 0,50 0,40 0,40 0,20
25 40 0,70 0,50 0,50 0,25
40 63 0,80 0,70 0,70 0,35
63 100 1,00 0,80 0,80 0,40
100 160 1,30 1,00 1,00 0,50
160 0,80% 0,60% 0,50% 0,30%

The table below sets out the standard tolerances that JIOrings usually offers its clients. Said tolerances are based on the standard ISO 3302-1. When we don’t have specific manufacturing requirements, we propose Class 2 (EN2 for the interior diameter, EW2 for the section and EC2 for the thickness).

Tolerances regarding thickness and section

Nominal Thickness (mm) Thickness (mm) Section (mm)
EC3 EC2   EW2 EW1
From Up to Standard tolerances Low tolerances  Standard tolerances Low tolerances
0,50 1 0,20 0,15 0,20 0,10
1 1,60 0,25 0,20 0,20 0,10
1,60 2,50 0,35 0,20 0,20 0,10
2,50 4 0,40 0,25 0,20 0,10
4 6,30 0,50 0,35 0,20 0,15
6,30 10 0,70 0,40 0,25 0,20
10 16 0,80 0,50 0,35 0,20
16 25 1,00 0,70 0,40 0,25

The table below sets out the standard tolerances that JIOrings usually offers its clients. Said tolerances are based on the standard ISO 3302-1. When we don’t have specific manufacturing requirements, we propose Class 2 (EN2 for the interior diameter, EW2 for the section and EC2 for the thickness).