O-Ring Moulds

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An O-ring mould decides whether every ring coming off it is the same. We have our own mould workshop and can design and manufacture a variety of moulds and tools, including the multi cavity O-ring tooling shown here. The advantage of buying the tool where the production runs is that consistency problems are corrected in the tool instead of argued about.

Key Benefits

• Every ring produced comes out to a uniform size and cross section
• Designed to exact specification rather than adapted from an existing cavity
• Built from materials that withstand rigorous production cycles
• Withstands high moulding temperatures without deformation
• Designed for easy cleaning and minimal upkeep

Problems It Solves

• Inconsistent cross sections between cavities and between batches
• Tools that deform under moulding temperature and drift out of specification
• High maintenance tooling that costs more in downtime than it saved in purchase
• Compatibility problems when a tool is used with a different compound

Who It Is For

• Seal producers needing additional or replacement tooling
• OEMs standardising on a proprietary seal size
• Buyers who want the tool and the production from one supplier
• Companies bringing seal production in house

Application Scenarios

• Series production of a specific O-ring size not covered by a standard mould
• Replacement tooling for an existing seal programme
• Multi cavity production where cycle economics matter
• Customers wanting to own O-ring tooling for use elsewhere

What You Are Actually Buying

Only values our own records support appear here. Anything we cannot evidence is left out rather than estimated.

Tool Type	O-ring and rubber moulds
Consistency	Uniform size and quality across every ring produced
Temperature Resistance	Withstands high moulding temperatures without deformation
Compatibility	Suitable for various rubber and elastomer materials
Maintenance	Designed for easy cleaning and minimal upkeep
Country of Manufacture	China

Materials

• Tool steel

Manufacturing Process

• Size confirmation
• Mould design
• Machining
• Fitting and polishing
• Trial moulding
• Release

Technical Features

• Precision designed so every O-ring meets exact specification
• Durable construction resisting wear through rigorous production cycles
• Temperature resistance without deformation at moulding temperature
• Compatible with various rubber and elastomer materials
• Designed for efficient production rates without loss of part quality

Quality Control

• Cavity dimensions checked against the specified size before release
• Trial moulding run and parts measured before the tool is signed off
• Cross section consistency verified across cavities
• Tool condition monitored during production runs here

Customisation Options

• Cavity count matched to your production volume
• Any O-ring size including non standard cross sections
• Tool retained here for production or shipped to you
• Designed for the specific compound you intend to run

Where This Is the Right Choice and Where It Is Not

Compared With Buying rings instead of the tool

If you only need parts, buy parts. A tool is worth owning when you want control of supply or intend to mould in house.

Compared With A generic mould shop

A shop that never moulds rubber will not anticipate cure, flash and shrinkage behaviour in the cavity design.

Compared With AS568 standard sizes

For standard sizes we already hold the complete mould set, so a new tool is unnecessary. Ask before commissioning one.

How to Specify and Order This Part

• Confirm whether your size is already in the AS568 series before ordering tooling

Confirm whether your size is already in the AS568 series before ordering tooling

• State the compound you intend to run so shrinkage can be allowed for

State the compound you intend to run so shrinkage can be allowed for

• Give the annual volume so cavity count can be chosen sensibly

Give the annual volume so cavity count can be chosen sensibly

• Clean the tool according to the maintenance guidance supplied with it

Clean the tool according to the maintenance guidance supplied with it

• Approve trial mouldings physically before releasing the tool

Approve trial mouldings physically before releasing the tool

Related Products

Rubber Moulds

We have our own mould manufacturing workshop and experienced structural design engineers, so we can independently design and develop rubber moulds rather than pass the work on.

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.

O-Rings

An O-ring is the cheapest part in most assemblies and the most common cause of a warranty return.

FKM Rubber Parts

This is FKM outside the sealing catalogue: custom moulded fluoroelastomer parts made to a customer drawing.

Related Guides and Industries

Compression Transfer and Injection Moulding for Rubber Parts

The moulding process decides tooling cost, cycle time and how much detail a part can carry. Choosing it is a commercial decision as much as a technical one.

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.

O-Ring Moulds Questions

Not if your size is in the AS568 series. We hold the complete mould set for it, and we will tell you that before selling you tooling.

It is designed to suit various rubber and elastomer materials, but tell us which compound you intend to run so shrinkage is allowed for correctly.

It follows from your annual volume. Send the quantity and we will propose a cavity count.

Yes, if agreed in writing before we start.

It is designed for easy cleaning and minimal upkeep, and we supply guidance with the tool.

One working day once we have the size, compound and volume.

Quote O-Ring Moulds

Send the size or drawing, the working conditions and the quantity. One working day for a considered reply.