GGB DU-B™ Metal-Polymer Composite Dry Bearings 07O DU-B

DU-B is a metal-polymer composite plain bearing designed for dry and lubricated operation in industrial, aerospace, marine, and heavy machinery applications. It features a bronze backing for improved corrosion resistance in humid or saline environments and is approved to EN 1337-2 for structural bearings. The bearing supports linear, oscillating, and rotating movements with a static and dynamic load capacity of 140 N/mm², operating temperatures from -200°C to 280°C, and a coefficient of friction between 0.02 and 0.25 under dry conditions. Maximum sliding speed is 2.5 m/s dry and 5.0 m/s when oil-lubricated, with a maximum pU factor of 1.8 N/mm²·m/s dry and 5.0 N/mm²·m/s lubricated. Shaft surface roughness should be 0.3-0.5 μm for dry use and ≤0.40 μm for lubricated use, with unhardened shafts acceptable or HB > 200 preferred for extended life.