Impregnated Bronze Washers

Impregnated bronze washers solve a specific problem. How do you keep a bearing lubricated when you can’t easily reach it to add grease? The answer lies in the material itself. We manufacture these washers from porous bronze. Then we saturate that porous structure with lubricating oil during production.

Under load, friction generates heat. That heat causes the trapped oil to expand and migrate to the surface, right where the washer contacts its mating part. Once the load eases, the bronze draws the oil back in. This self-regulating cycle repeats for the life of the component. That’s why no external lubrication system is ever needed.

The result is a washer suited to continuous or moderate-load environments. Think electric motors, fans, and small mechanical assemblies, where wear resistance and uniform load distribution matter more than raw strength. Precision manufacturing keeps the porous structure consistent from batch to batch. So performance doesn’t vary from one washer to the next.

Key Features

• Oil-impregnated bronze structure that self-lubricates under load
• Oil migrates to the surface through heat and pressure, then retracts at rest
• Low friction for smooth, efficient operation
• No external oil or grease required, ever
• Built for continuous and moderate load applications
• Uniform load distribution across the bearing surface
• Available in standard and customized sizes

Applications

• Electric motors and fans
• Industrial and light machinery
• Automotive components
• Office equipment
• Pumps and small mechanical assemblies
• General engineering applications

Why Choose Our Impregnated Bronze Washers?

Every washer we produce goes through controlled oil-saturation to a consistent porosity level. That consistency is what makes the self-lubricating cycle reliable, washer after washer, not just on the first few off the production line. We also test load distribution and dimensional tolerances before dispatch. So when you spec these washers for motors, fans, or pump assemblies, you’re not compensating for batch-to-batch variation. You get the same performance every time you reorder.

FAQs