ISO-9001 QS-9000Garlock Bearings LLC

1 DX Prelubricated bearingsDU Self-lubricating bearingsGarlock Bearings LLCG arlock Bearings LLC ISO-9001 QS-9000 Certificate No. A4360 DUDX 20M Garlock Bearings LLC 01/00 Garlock Bearings LLCSTIEG738(Cov) 6/22/01 9:17 AM Page 1 INTRODUCTION1-1DU, high performance self-lubricating bearings1-2DX, Bearings that can do more1-4 Properties of DU and DX Compared1-6 APPLICATIONS2-1DU applications2-2DX applications2-5DU and DX Bearings application data sheet2-6 SIZES AND ORDERING3-1DU Bearings inch sizes up to 2"3-2DU Bearings inch sizes over 2"3-4DU thrust washers inch sizes3-5DU flat strip material inch sizes3-5DU Bearings metric sizes up to 45mm3-6DU Bearings metric sizes over 45mm3-8DU thrust washers metric sizes3-9DU flanged Bearings inch sizes3-10DU flanged Bearings metric sizes3-11DX Bearings inch sizes3-12DX thrust washers inch sizes3-13DU DATA FOR DESIGNERS4-1 Technical information4-2 Design factors4-6 Lubricated environments4-11DX DATA FOR

2 DESIGNERS5-1 Technical information5-2 Design factors5-4 INSTALLATION AND FABRICATION6-1 Installation guidelines6-2 TABLE OF CONTENTSG arlock Bearings LLC ISO-9001 QS-9000 Certificate No. A4360 Garlock Bearings LLCIn addition to the DU and DX bearingsdescribed in this catalog, Garlock Bearingsalso offers a wide range of other self-lubricating Bearings , including:GAR-MAX impact resistant bearingscombine a rugged filament wound glass-epoxy backing with a surface of wound PTFE and polyester fibers for low filament wound bearingswith a filled PTFE tape bearing surface forlong life without 426 bearing tape for remarkable performance with or without lubrication in machine tool ways, gibs andother sliding Bearings which combinethe convenience, economy and flexibility ofinjection molding with outstanding frictionand wear Bearings also offers filled PTFE Bearings .

3 Integral lip seal bushings and a variety of other types of self-lubricating bearing materials to meet specialized application inquiry is invited on any of these Bearings . Garlock Bearings LLC 700 Mid-Atlantic Parkway, Box 189 Thorofare, New Jersey 08086 Phone (856) 848-3200 Fax (856) Self-lubricating Bearings from Garlock BearingsSelf-Lubricating BearingsPrelubricated BearingsGarlock Bearings LLC700 Mid Atlantic Parkway, Box 189, Thorofare, New Jersey 08086 Phone 1-800-222-0147 Fax 856-848-5115 DX GAR-MAX , GAR-FIL , MULTIFIL and MULTILUBE are trademarks of Garlock Bearings and DX are trademarks of the Dana Corporation. 2000 Garlock Bearings LLC.

4 All rights (Cov) 6/22/01 9:17 AM Page 3 Self-Lubricating BearingsPrelubricated BearingsGarlock Bearings LLC700 Mid Atlantic Parkway, Box 189, Thorofare, New Jersey 08086 Phone 1-800-222-0147 Fax 856-848-5115 DX INTRODUCTIONSTIEG738(text) 6/22/01 9:21 AM Page 1 IntroductionSelf-Lubricating BearingsGarlock Bearings LLC700 Mid Atlantic Parkway, Box 189, Thorofare, New Jersey 08086 Phone 1-800-222-0147 Fax 856-848-5115 1-33. PTFE-lead overlay This low friction overlay, inch ( mm) thick, provides an excellent initial transfer film which effectively coats the mating surface of thebearing assembly, forming an oxide typesolid lubricant film. As this film is depleted,the relative motion of the mating surfacecontinues to draw material from the porousbronze conditions are severe, the feed oflubrication is increased.

5 The peaks ofporous bronze coming in contact with themating surface generate localized heat and,due to the high thermal expansion rate ofthe PTFE, force additional lubricant to thebearing surface. The relative motion of themating parts wipes the lubricant over theinterface, continuously restoring the lowfriction surface limits: beyond any self-lubricating bearing materialDU Bearings including plain Bearings ,thrust washers, flanged Bearings andslides offer these remarkable operatingparameters:Loads P Dynamic pressures up to 20,000 psi (140 N/mm2) and compressive yieldstrength of 44,000 psi (310 N/mm2), assuring high load carrying capacity andexcellent resistance to shock V Speeds up to 1000 fpm (5 m/s) without lubrication.

6 2000 fpm (10 m/s) with PV PVs to 50,000 psi-fpm ( N/mm2x m/s)for continuous operation, 100,000 psi-fpm( N/mm2x m/s) for short-term use. Inactual operation, DU Bearings have beensuccessfully used at levels which approach3,000,000 psi-fpm (105 N/mm2x m/s) From -328 to +536 F ( -200 to +280 C),making it suitable for use in applicationswell beyond the scope of most liquid Ideal for all types of rotating, oscillating, and sliding motion, and both radial andthrust be used totally dry, fully lubricated, or with intermittent lubrication and can be used in the presence of many industrial BearingsGarlock Bearings LLC700 Mid Atlantic Parkway, Box 189, Thorofare, New Jersey 08086 Phone 1-800-222-0147 Fax 856-848-5115 1-2DU Bearings combine the advantages ofmany conventionally lubricated, metallicplain Bearings particularly high loadcapacity and dimensional rigidity with the design freedoms of self-lubricatingmaterials.

7 Including the ability to operatesuccessfully well beyond the scope of conventional lubricants. The material: a steelbacked compositeThe key to the remarkable performancecapabilities of DU is its unique method ofmanufacture. By employing the uniquemethod of sintering and mechanical interlocking by impregnation, DU bearingseliminate the problems of temperature andaging faced by bonded films and fabrics. In addition, the polymeric self-lubricatingmaterial in the DU structure does not haveto provide structural support. Furthermore,the metal components provide maximumheat dissipation. The photomicrographabove (Figure 1-1) shows the three main elements that make up this composite:1.

8 Steel backingThis steel backing gives DU its exceptionallyhigh load carrying capacity; thin, compactdesign; excellent heat dissipation; anddimensional and structural Porous bronze innerstructureThis comprises a nominal inch ( mm) thick layer of carefully sizedbearing quality bronze powder which is sintered onto the steel backing. Thisporous structure is impregnated with ahomogeneous mixture of PTFE (polytetra-fluoroethylene) and lead. In addition to providing maximum thermal conductivityaway from the bearing surface, this uniquebronze innerstructure also serves as areservoir for the PTFE-lead is the highest performance self-lubricating bearingmaterial available anywhere.

9 It offers a combination of properties and capabilities unmatchedby any other self-lubricating bearing material and, consequently, has the broadest application ..the high performance self-lubricating bearing materialFigure 1-1. DU Photomicrograph Cross Section123 STIEG738(text) 6/22/01 9:21 AM Page 2 IntroductionPrelubricated BearingsGarlock Bearings LLC700 Mid Atlantic Parkway, Box 189, Thorofare, New Jersey 08086 Phone 1-800-222-0147 Fax 856-848-5115 1-53. Acetal resin linerThe acetal resin forms a nominal inchthick ( mm) liner that gives the DXbearing its distinctive yellow color. Thisacetal resin has the outstanding property ofhigh wear resistance and low friction evenwhen only minute quantities of lubricant are supplied to the polymer DX Bearings only have moderate performance in the complete absence oflubricant, the response of the polymer pro-vides superior bearing performance in thepresence of even a trace of conventional oilor grease.

10 Under conditions of marginallubrication or those which do not favor theformation of a complete oil film oscillatingor fretting conditions, high loads, lowspeeds, frequent stop/start or startingunder load DX is the preferred standard DX bearing surface carries apattern of circular indents which should befilled with grease on assembly of the bear-ing. The pattern is so designed that everypoint on the bearing surface is suppliedwith lubricant from an indent by the rotationof the mating surface. There may be occasions when non-indented or groovedbearing bores are required. These are available as nonstandard pockets must be filledwith a suitable lubricant beforeassembly.