HPM™ - GGB - #1

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HPM™ Bearing Material HPM™ is a trademark of GGB. ©2009 GGB. All rights reserved. www.ggbearings.com 12-09 * Alternative shaft hardnesses and shaft surface finish is possible, depending on the application. Please contact your local GGB representative. HPM™ Bearing Material Characteristics Applications • Specifically developed for hydropower applications • High load capacity • Excellent shock and edge loading capacity • Low friction, superior wear rate and bearing life • Excellent corrosion resistance • Dimensional stability – low water absorption, no swelling • Environmentally friendly Industrial Servo-motor bearings, operating ring sliding segments, linkage bearings, wicket gate bearings, guide vane bearings, intake gate sliding segments, intake gate roller bearings, spillway gate bearings, trash rate bearings, fish screen bearings, trunnion bearings, blade bearings, injector bearings, deflector bearings, ball and butterfly trunnion bearings, etc. Composition & Structure Operating Conditions Availability Composite Material Sliding Layer Continuous wound PTFE and high-strength fibres encapsulated in a self-lubricating, high temperature epoxy resin Backing Continuous wound glass fibre encapsulated in high temperature epoxy resin dry very good Ex stock • N/A To order • Cylindrical bearings diameters up to 500 mm (20 inches) oiled fair greased poor water very good process fluid fair Microsection Bearing Properties Unit Value Dry Maximum sliding speed v m/s 0.13 Maximum pv factor MPa x m/s 1.23 Coefficient of friction f – 0.05-0.30 Grease lubrication Maximum sliding speed v m/s - Maximum pv factor MPa x m/s - Coefficient of friction f – - General Maximum temperature Tmax °C +160 Minimum temperature Tmin °C -195 Maximum load p static MPa 140 Maximum load p dynamic MPa 140 Shaft surface finish Ra * ìm 0.2-0.8 Shaft hardness - normal HB >350 Shaft hardness - for longer service life HB >480 Sliding layer Backing