Rubber Seals
O-Rings
An O-ring is the cheapest part in most assemblies and the most common cause of a warranty return.
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Rubber Seals
AS568 O-Ring Series
We possess all the moulds for the AS568 O-ring size range, which lets us supply standard parts of the series promptly and without a tooling step. For a buyer that turns the size question into a non question and leaves only the compound and the quantity to settle. The size chart pages shown here are the same ones our own engineers work from.
Product Photographs
Every image on this page is a photograph of parts we have produced.
Why It Wins
Key Benefits
- No tooling charge and no tooling lead time on any dash number in the series
- Sizes supplied promptly because the mould already exists rather than being scheduled
- Any of our twelve compounds available against a standard size
- One dash number identifies the part unambiguously between you and us
- Design freedom to standardise new hardware around a size that never needs tooling
The Brief
Problems It Solves
- Paying for a mould on a size that a standard series already covers
- Lead times inflated by tooling that was never necessary
- Ambiguity when a seal is described by a measured diameter rather than by a dash number
- Suppliers who hold only part of the series and substitute for the rest
Audience
Who It Is For
- Design engineers fixing a groove design who want to avoid a permanent tooling cost
- Maintenance buyers ordering against an existing dash number
- Distributors stocking a standard seal programme
- OEMs standardising a seal schedule across several machines
In Service
Application Scenarios
- Machine tools and engineering machinery
- Agricultural machinery and construction machinery
- Instrumentation and chemical machinery
- Automobiles ships and aerospace equipment
- Mining machinery plastic machinery and petroleum machinery
Specification
What You Are Actually Buying
Only values our own records support appear here. Anything we cannot evidence is left out rather than estimated.
| Standard | AS568 O-ring size series |
|---|---|
| Mould Coverage | Complete series held in house |
| Compounds Available | FKM, FFKM, SIR, EPDM, NBR, SBR, FVMQ, AEM/ACM, HNBR, CR, NR, CSM |
| Tooling Required | None for standard dash numbers |
| Also Known As | AS568 O-RING, AS568 O RING, AS568 ORING |
| Country of Manufacture | China |
Materials
- FKM
- FFKM
- SIR silicone
- EPDM
- NBR
- SBR
- HNBR
- CR
- NR
Manufacturing Process
- Dash number confirmation
- Compound selection
- Moulding from existing AS568 tool
- Inspection
- Packing
Detail
Technical Features
- Complete AS568 mould set held in house rather than partially
- Dash number identifies both inside diameter and cross section family
- Available across the full compound range we mould
- Applications spanning virtually every branch of general machinery
How We Check
Quality Control
- Dash number confirmed against the size chart before production
- Cross section checked on the moulded part rather than assumed from the tool
- Production checked against the approved first article
- Same tool used for repeat orders so sizes stay consistent
Made to Order
Customisation Options
- Any dash number in the series in any compound we mould
- Colour coding by compound for plant identification
- Mixed dash number schedules on a single order
- Non standard cross sections tooled separately when the design needs one
Honest Comparison
Where This Is the Right Choice and Where It Is Not
Compared With A custom tooled size
Where the groove is not yet fixed, designing around an AS568 dash number removes a tooling cost and a lead time permanently.
Compared With A supplier holding part of the series
Partial coverage means substitution on the sizes they lack. We hold the complete set.
Compared With Measuring the old seal
A measured inside diameter without the cross section is the most common source of a seal that fits and still leaks.
Use Guide
How to Specify and Order This Part
Find the dash number on the size chart rather than ordering by measured diameter
Measure both inside diameter and cross section thickness if the dash number is unknown
Choose the compound against the medium and the temperature range
Where new hardware is being designed, pick a dash number before fixing the groove
Quote the dash number on every reorder to keep the part unambiguous
Related Products
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Guide
The AS568 O-Ring Size Standard and Why It Saves You Tooling
AS568 is the reason some O-ring quotations come back with no tooling charge and a short lead time, and others do not.
Read the guide →
Guide
How to Choose a Rubber Seal Material in Six Questions
Six questions decide almost every seal material choice. Answer them before you ask for a price, and the quotation you get back will be worth comparing.
Read the guide →Answers
AS568 O-Ring Series Questions
Do you really hold moulds for the whole series?
Yes. We possess all the moulds for the AS568 O-ring size range, which is why we can supply standard parts of the series promptly.
Which compound can I have an AS568 size in?
Tell us the dash number and the compound. The size is not the constraint, though the compound and quantity may affect price and lead time.
I do not know my dash number. What do I send?
A photo with the inside diameter and cross section thickness measured. We will identify the dash number from the chart.
Is there a tooling charge?
No, not for standard dash numbers.
Can I order several dash numbers on one order?
Yes. Mixed size and mixed compound schedules are normal for us.
How fast can you quote?
Within one working day once we have the dash numbers, the compounds and the quantities.
Quote AS568 O-Ring Series
Send the size or drawing, the working conditions and the quantity. One working day for a considered reply.