In marine and offshore projects, plastic gears, bearings and wear parts is only acceptable when the paperwork is right. This article maps the standards, test methods and documents you should ask for.
This guide is written for engineers, purchasers and project managers who need a practical answer, not a resin data sheet.
This category covers a family of products rather than a single item. In practice a buyer defines plastic gears, bearings and wear parts by three things: the base resin, the format or dimension, and the performance or certification level it has to meet. Typical options in this category include PTFE and oil filled compounds; backlash controlled assemblies; module 0.3 to 8. Materials most often specified are Polyamide, Polytetrafluoroethylene, Polyoxymethylene, UHMWPE, and the choice between them changes stiffness, temperature resistance, chemical behaviour and price.
In the marine and offshore sector the decision is usually driven by UV and salt resistance and impact strength, with buoyancy as a secondary requirement. Typical end uses include dock fenders, hull panels, deck fittings.
These figures are typical for commercial grades and should be confirmed against the supplier's certificate for your specific lot.
| Material | Density | Tensile strength | Service temperature |
|---|---|---|---|
| Glass Filled Nylon | 1.36-1.38 g/cm³ | 130-190 MPa | -40°C to 150°C |
| Polyamide | 1.13-1.15 g/cm³ | 60-85 MPa | -40°C to 120°C |
| UHMWPE | 0.93-0.94 g/cm³ | 30-45 MPa | -150°C to 80°C |
Polyoxymethylene is frequently the default selection here: POM is the standard replacement for small metal parts that must hold tight tolerances.
Ask for the certificate number and test report, not just a claim of compliance.
Ask the supplier to state the standard number, the test method and the result on the certificate. A test report without a standard reference is difficult to defend during an audit.
Beyond the base resin, most suppliers offer UV stabilised, food contact, flame retardant, anti-static and recycled content versions of the same product. Ask which additive package is included, because it is often the difference between a part that lasts three years and one that lasts ten.
The route below is the one most factories use for this type of part.
Secondary operations such as printing, welding, machining and assembly are often cheaper to do in the same factory, and they reduce the risk of mismatch between components.
These are the criteria that actually predict whether the part will perform in service.
Send this list to your supplier with the drawing and you will receive comparable quotations from every factory you contact.
Colour is controlled with a masterbatch reference approved by the customer, and every production lot is checked against the approved sample under standard lighting before shipment.
Yes. {mat1} is one of our regular materials for this item, and we can supply virgin, modified and certified grades with full traceability. Material certificates and test reports are issued per batch.
A new tool typically takes 25 to 45 days depending on cavity count and complexity, followed by T1 samples within one week. Existing tools can usually start production within 10 to 15 days of order confirmation.
We can provide ISO 9001 quality system documentation, material certificates, RoHS and REACH statements, and where applicable food contact, flame retardancy or drinking water approvals. Tell us your target market and we will match the document set.
Standard packing is export cartons on fumigation-free pallets, with custom labelling, barcode and retail packing available. We also handle consolidated containers and door to door delivery.
Share your specification and quantity with us and we will recommend the most cost effective material, tooling route and packing method for your market.
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