D R I E – D Lagertechniek bv DATA SHEETS

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DRIE-D Lagertechniek bv the right perspective Kiotoweg 120, 3047 BG, Rotterdam, NL telephone: (+31) 10 - 462 07 00 telefax: (+31) 10 - 462 07 07 E-mail: mail@drie-d.nl internet: www.drie-d.nl DATA SHEETS D-GLIDE Remarks to the tables: 1 The strength of a composite material is no objective value but depends on the shape of the test sample and the direction of the load. Given values apply to a flat sample of 50 x 50 x 5 mm and are determined at a temperature of 20°C. 2 Given loads are failure loads, bearing design pressures are lower and depend on application details. 3 The values for water absorption indicate the maximum increase in wall thickness for a bearing that is continuously immersed in water. 4 The thermal expansion is perpendicular to the normal fibre orientation, the expansion parallel to the fibres if less. 5 With reference to the chemical resistance the main threats comes from concentrated acids and bases. With D-glide P and F also caution must be taken in contact with solvents such as ‘Tri’ and ‘Tetra’. In case of use of the bearings in a chemically aggressive environment please always consult DRIE-D. 6 The maximum temperatures given are the temperatures that the materials can withstand for a longer period of time without negative consequences, briefly higher temperatures are allowed. 7 For use of D-glide bearings at temperatures of over 80 °C please always consult DRIE-D. 8 D-glide does not have a ‘glass-temperature’, there is no fixed bottom temperature, it does not get brittle. The stiffness increases with decrease of the temperature and the other way around. 9 With reference to the friction values the given lower limits indicate what is feasible under optimal conditions, it is advised to base calculations on the upper limits. 10 With reference to the wear resistance this is the reduction in wall thickness as a function of the sliding distance. Given indications come from comparisons with conventional and other plastic bearings in typical applications in good conditions. 11 With reference to the resistance against abrasive wear this is the reduction in wall thickness as a function of the sliding distance. Given indications come from comparisons with conventional and other plastic bearings in typical applications in strongly polluted environments. 12 With reference to the hardness of counter faces, minimal values of ~HB180 are advised. In case of abrasive conditions, high sliding speeds in combination with high loads or vibrations a harder counter face material could be required. Again when in doubt contact DRIE-D. 13 With reference to the roughness of counter faces a Ra value of 1.2µ or better is advised, but not lower than 0.2µ data sheets UK, D-glide complete, 2008, page 10
DRIE-D Lagertechniek bv the right perspective Kiotoweg 120, 3047 BG, Rotterdam, NL telephone: (+31) 10 - 462 07 00 telefax: (+31) 10 - 462 07 07 E-mail: mail@drie-d.nl internet: www.drie-d.nl CRANE BUILDING Application: D-glide F bushings are used in the main hinges of a large floating harbour crane. Shaft diameter is ø560 mm. The originally proposed roller bearings could not be guaranteed for this application. The D-glide F bearings used instead are now fully maintenance free and the costs were less than one third of the original. Advantages of the D-glide solution - maintenance free - high allowable peak loads (6 times more than roller bearings) - easy installation (low weight) - simple design - low cost - wear indicator possible - maximum reliability (no external provisions needed) Files Crane building, 1.jpg: Crane building, 2.jpg: Crane building, 4.jpg: D-glide F main hinge bearing, shaft ø560, being frozen in liquid Nitrogen. Cold D-glide F main hinge bearing (-196 °C) being installed in the housing. D-glide F main hinge bearings installed. data sheets UK, D-glide complete, 2008, page 11
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