Metal-Polymer Materials Dry DU®B - GGB - #1

Text version of the page

DU®B Bearing Material DU®B is a trademark of GGB. ©2010 GGB. All rights reserved. www.ggbearings.com 03-10 DU®B Bearing Material Characteristics Applications • Dry bearing material with good wear and friction performance over a wide range of load, speed and temperature conditions • DU®B also performs well with lubrication • Bronze backing provides improved corrosion resistance compared with DU® • Available from stock in a wide range of standard sizes • Antimagnetic • DU®B material approved according to EN1337-2 standard for structural bearings for civil engineering applications Industrial Aerospace, agricultural equipment, construction equipment, material handling equipment, forming machines - metal, plastic and rubber; office equipment, medical and scientific equipment, packaging equipment, pneumatic and hydraulic cylinders, pumps and motors, railroad and tramways, textile machinery, valves, etc. Others Marine and offshore equipment, other applications in water or in outdoor environments Composition & Structure Operating Conditions Availability Metal-polymer composite material Bronze + porous bronze sinter + PTFE + Pb dry very good Ex Stock • Standard cylindrical bushes, flanged bushes and strip To order • Thrust washers, flanged washers and non-standard parts oiled good greased fair water good process fluid fair Microsection Bearing Properties Unit Value Dry Maximum sliding speed v m/s 2.5 Maximum pv factor - continuous operation - intermittent operation MPa x m/s 1.8 3.5 Coefficient of friction f – 0.02-0.25 Oil lubrication Maximum sliding speed v m/s - Maximum pv factor MPa x m/s - Coefficient of friction f – 0.02-0.12 General Maximum temperature Tmax °C +280 Minimum temperature Tmin °C -200 Maximum load p static MPa 140 Maximum load p dynamic MPa 140 Shaft surface finish Ra - dry operation ìm 0.4±0.1 Shaft hardness HB hardened and unhardened possible Sliding layer PTFE + Pb Porous bronze sinter Bronze backing seawater resistant antimagnetic