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DU® Bearing Material DU® is a trademark of GGB. ©2010 GGB. All rights reserved. www.ggbearings.com 03-10 DU® Bearing Material Characteristics Applications • Dry bearing material with good wear and friction performance over a wide range of loads, speeds and temperature conditions • DU® also performs well with lubrication • Available from stock in a wide range of standard sizes 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. Composition & Structure Operating Conditions Availability Metal-polymer composite material Steel + porous bronze sinter + PTFE + Pb dry very good Ex Stock • Standard cylindrical bushes, roll-formed bushes, flanged bushes, thrust washers, flanged washers, strip To order • Non-standard parts oiled good greased fair water fair 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 250 Maximum load p dynamic MPa 140 Shaft surface finish Ra - dry operation µm 0.4±0.1 Shaft hardness HB hardened andunhardened possible Sliding layer PTFE + Pb Porous bronze sinter Steel backing