Short answer
Oil-filled cast nylon is a PA6G grade made by adding oil to the material during casting. The oil slowly migrates to the surface in service and lowers the friction coefficient. It noticeably extends the life of fast-running bushings, bearings and slides that cannot be lubricated, or where lubrication is forgotten.
How does it work?
Standard cast nylon is already self-lubricating, but heat builds up at high speed and surface pressure. In the oil-filled grade, oil evenly distributed through the material forms a thin film on the contact surface. The film reduces both friction and heat.
Where is it preferred?
- Bushings and plain bearings that are hard to reach for lubrication.
- Dusty environments where grease is unwanted (grease traps dust).
- Fast-running pulleys and rollers.
- Slides and guides.
Other bushing design criteria are covered in cast nylon bushings and plain bearings.
What to keep in mind
Mechanical strength is close to standard PA6G; the choice is driven mainly by friction and heat. Share speed, load and temperature and we will recommend standard, oil-filled or MoS₂-filled material.
We make pulleys, rolling mill bearings and bushings from oil-filled cast nylon to your drawing: request a quote.
Frequently asked questions
Can oil-filled cast nylon touch food?
That depends on the type of oil used. For food contact the suitability of the material must be confirmed and a certificate requested.
What colour is oil-filled cast nylon?
It is usually green, but colour is not standardised and can vary by supplier.
