An endless ring is moulded as one continuous piece, with no joint.
A joined cord ring is cut from extruded cord and joined to size. Both routes have their place, and the duty decides which is sensible.
Moulded versus joined cord
A joined cord ring can be acceptable in a static groove with mild media, modest temperature and easy access for replacement.
For temperature cycling, aggressive chemicals, steam or cleaning cycles, check the construction, compound and acceptance requirements before choosing the supply route.
Selection depends on the duty, the pressure or vacuum, the media, the quality of the joint and any certification required. We will say plainly which route we would fit and why.
Sizes and tolerances
Tell us the inside diameter, the cross section and the tolerance class your drawing calls for. We will confirm what the supply route can hold before you order.
What to send us
The inside diameter, cross section, material, duty, media, temperature and pressure. If you have an existing ring or drawing, a photo helps.
See also our large diameter O ring sourcing guide.
Frequently asked questions
- What does endless mean?
- The ring is moulded as one continuous piece with no joint.
- When is a joined cord ring acceptable?
- Often in static, mild, easily accessed duties. Tell us the duty and we will say.
- Which route should I choose?
- It depends on the duty, the pressure or vacuum, the media, the joint quality and any certification required. We advise before you order.
Enquire about large O rings
Send the dimensions and the application. We check the choice before you order, and come back with a quotation. You can also email office@acumenseals.co.uk.