Custom made various NBR flexible rubber rings

Flexible rubber rings can be customized in NBR for a matching contact or sealing arrangement. The ring dimensions should suit the receiving profile while its compound meets the intended exposure conditions. Flexibility helps handling, but the installed ring still needs the correct size and section.

During placement, guide the ring evenly around its mating feature instead of pulling one section much farther than the rest. A twisted section can be difficult to notice once the joint closes. Check that the ring lies naturally in its intended seat before applying compression.

The mating surfaces should be clean and free of sharp transitions that can nick the rubber. Consider any larger feature the ring must pass over during installation, because assembly stretch may be different from its working condition. Inspect the full circumference after fitting where access allows. For replacement, measure the intended seat rather than copying a ring that has become stretched in use. Preserve the selected NBR formulation and section so the new component matches the original contact requirements.

Material options

NBR. Custom formulation and color for the intended contact conditions.

Hardness selection

Rubber: 30–90 Shore A. Consider any larger feature the ring must pass over during installation, because assembly stretch may be different from its working condition.

Custom dimensions

The ring dimensions should suit the receiving profile while its compound meets the intended exposure conditions.

Fit & assembly

Check that the ring lies naturally in its intended seat before applying compression.

Use & inspection

For replacement, measure the intended seat rather than copying a ring that has become stretched in use.

Photos illustrate structure or material only. During placement, guide the ring evenly around its mating feature instead of pulling one section much farther than the rest. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.