
O-Ring Moulds
O-ring moulds designed and manufactured in an in-house mould workshop that also produces a range of other moulds and tools.

Product Overview
O-ring moulds designed and manufactured in an in-house mould workshop that also produces a range of other moulds and tools. The mould is engineered so every O-ring produced is of uniform size and quality, built from materials that withstand high moulding temperatures without deformation, and designed for easy cleaning and minimal upkeep. It is compatible with a range of rubber and elastomer materials.
Why Buyers Choose This Specification
Uniform Size Across Every Cavity
An O-ring mould has many cavities and they must all produce the same part. Cavity-to-cavity consistency is what separates a production tool from a sample tool.
Withstands Moulding Temperature Without Deforming
Rubber moulding runs hot for long cycles. A mould that moves at temperature produces flash and out-of-tolerance parts from the first shift.
Designed for Easy Cleaning
Rubber moulds foul with cure residue. Easy cleaning and minimal upkeep is what keeps the tool producing rather than sitting on the bench.
Works Across Elastomers
Suitable for various rubber and elastomer materials, so the same tool can run NBR, EPDM or FKM as demand changes.
Where It Is Used
- Production tooling for a standard O-ring size
- Custom O-ring sizes not covered by a standard series
- Moulds for a specific elastomer requirement
- Replacing worn production tooling
- Bringing O-ring production in-house
- Tooling for a range of rubber and elastomer parts
The Buyers This Product Suits
Seal Manufacturers
A production O-ring mould is the capital item that determines both output rate and part consistency.
Companies Producing Their Own Seals
An in-house mould removes the dependency on an external seal supplier for a critical part.
Buyers Needing a Non-Standard Size
Where no standard series covers the size, a dedicated mould is the only route to volume production.
What It Fixes
Variation Between Mould Cavities
Precision engineering ensures every O-ring produced meets exact specifications, cavity to cavity.
Tools Deforming at Moulding Temperature
High-quality materials are used so the mould withstands moulding temperatures without deformation.
Cleaning Downtime on Rubber Tooling
The mould is designed for easy cleaning and minimal upkeep.
Published Figures For This Product
Every value below comes from our own product specification. Where a figure is not published we leave it out rather than estimating it.
| Capability | In-house mould workshop for a variety of moulds and tools |
|---|---|
| Consistency | Every O-ring produced of uniform size and quality |
| Temperature Resistance | Withstands high moulding temperatures without deformation |
| Maintenance | Designed for easy cleaning and minimal upkeep |
| Compatibility | Various rubber and elastomer materials |
| Grade | Multi-cavity production tooling |
How It Ships And What Comes With It
Packing And Loading
Shipping volume for this item depends on the configuration and capacity you select, so no fixed container figure is published. Confirm the specification and the destination and a loading plan is issued with the quotation, rather than a figure we cannot support.
Documentation On File
- Rubber Seals and Plastics · Rubber and Plastic Products Specification Sheet20.1 KB
- Catalogue · Full Product Catalogue154.0 KB
Sourcing And Inspection
This product is supplied through TrueGlow Imaging, working with manufacturing partners whose facilities are visited and verified rather than taken on trust. In-process quality control and delivery supervision are available so goods are inspected before the container is sealed. Certifications quoted on this page are those stated on the product specification and belong to that product range rather than to our trading entity, so ask for the certificate covering your specific item.
Getting It Right First Time
Step 1
Confirm the O-ring size and tolerance before the mould is cut.
Step 2
State which elastomers will be run, since shrinkage differs between them.
Step 3
Agree the cavity count against your required output per cycle.
Step 4
Sample the tool across all cavities, not just one, before approval.
Step 5
Clean the mould on the specified schedule to protect part quality.
How It Compares In Our Range
A dedicated mould against buying finished O-rings.
| O-Ring Mould | Capital cost once, then production in-house with control over material and schedule. Justified by volume or by a non-standard size. |
|---|---|
| Buying Finished O-Rings | No tooling cost and immediate supply for standard sizes such as the AS568 series. |
O-Ring Moulds Questions
Do you make your own moulds?
Yes. We have our own mould workshop and can design and manufacture a variety of moulds and tools.
How consistent are the parts?
The mould is engineered so every O-ring produced is of uniform size and quality.
Can the mould handle high temperatures?
Yes, it is built to withstand high moulding temperatures without deformation.
Which materials can be moulded in it?
It is suitable for various rubber and elastomer materials.
How much maintenance does it need?
It is designed for easy cleaning and minimal upkeep.
What do you need to quote a mould?
The O-ring size and tolerance, the elastomers to be run, and your required output per cycle.
Sectors That Use This Product
Metal Fabrication and Machine Shops
Custom parts, tooling and the cranes that move them around the shop.
Food Packaging Lines
Depalletizing to palletizing, balanced against the filler in the middle.
Warehousing and Heavy Industry
Lifting from 250 kg to 360 tons, indoors on a runway or outdoors on legs.
Guides That Cover This Product
Selecting an O-Ring Material NBR EPDM FKM or FFKM
Almost every seal failure is a material selection error rather than a dimensional one. The fluid and the temperature decide the elastomer, and the size is the easy part.
Quote O-Ring Moulds
Send the capacity or size you need, the quantity and the destination, and we will confirm the configuration, the lead time and a loading plan.


