Short answer
Cast nylon rolling mill bearings are shock-absorbing, wear-resistant plain bearings used instead of bronze bearings in iron and steel plants. They are light, wear the shaft surface less, and the need for lubrication can be reduced with oil-filled or MoS₂-filled grades. They are made in large diameters to drawing or sample.
Why cast nylon mill bearings?
- Shock absorption and quiet running under impact loads.
- Protection of shaft and roll surfaces.
- Much lighter than bronze; easier assembly.
- No corrosion in water-cooled environments.
Design and material
In a rolling mill, temperature and water act together. Bearing clearance must allow for thermal expansion and moisture absorption: tolerances and water absorption. In bearings that are hard to lubricate, oil-filled cast nylon can extend life.
General plain bearing design rules are in cast nylon bushings and bearings.
Production
We CNC-machine mill bearings from large-diameter cast nylon tube or block. Examples: rolling mill bearings. You can send a worn bearing as a sample: request a quote.
Frequently asked questions
What temperature can a cast nylon mill bearing take?
Standard cast nylon runs continuously up to +100 °C. For higher temperatures, a heat-stabilised grade or another material is considered.
Can you make it to the size of an existing bronze bearing?
Yes, but the bore clearance is recalculated because of the expansion and moisture behaviour of cast nylon.
