Workhorse Gates Bandas Sincronas (2)

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Pol y Chai nGT2 Bel t Dri vesOut muscl e and out l astrol l er chai n i n l ow-speed, hi gh-t orque appl i cat i ons.THE DRIVING FORCE IN POWER TRANSM ISSIONDri ve Desi gn ManualWor k hor se Wor k hor seTable Of ContentsDescription Page Description PageIntroduction to Poly Chain GT2 Belt Drives . . . 2-9Low Speed Poly Chain GT2 Belt Drive Designs 10-19Low Speed Design Calculations . . . . . . . . . . 10-13Low Speed Drive Selection Procedure . . . . . . 14-18Low Speed Drive Design Information Sheet . . . . . 19Poly Chain GT2 Belt DrivesBelt System Specifications . . . . . . . . . . . . . . 20Stock Belt Lengths and Widths . . . . . . . . . . . . 21Standard Belt Drive Selection Procedure . . . . . 22-25Belt Pitch Selection Guide. . . . . . . . . . . . . . . 25NEMA Minimum Sprocket Diameters . . . . . . . . . 26Poly Chain GT2 Service Factors . . . . . . . . . . . 27Poly Chain GT2 Belt Drive Selection Tables8mm Pitch Belts. . . . . . . . . . . . . . . . . 28-4114mm Pitch Belts . . . . . . . . . . . . . . . . 42-61Poly Chain GT2 Power Rating Tables8mm Pitch Belts. . . . . . . . . . . . . . . . . 62-6514mm Pitch Belts . . . . . . . . . . . . . . . . 66-70Poly Chain GT2 Sprocket SpecificationsSprocket Reference Drawings. . . . . . . . . . . . . 718mm Pitch Sprocket Dimension Tables. . . . . 72-7314mm Pitch Sprocket Dimension Tables . . . . 74-77Sprocket Tolerance Specifications . . . . . . . . . . 78Bored-To-Size Sprocket Bore Range Listing . . . . . 79Bored-To-Size Sprocket Re-bore Specificationsand Instructions . . . . . . . . . . . . . . . . . 80-81Taper-Lock BushingsDrawings and Dimension Tables . . . . . . . . . . . 82Stock Bore and Keyseat Information. . . . . . . . 83-84Taper-Lock Type Sprocket Installation and Removal . 85Belt Drive Tensioners . . . . . . . . . . . . . . . . 86Poly Chain GT2 Sprocket Diameter Tables8mm Pitch Table . . . . . . . . . . . . . . . . . . 87-8814mm Pitch Table . . . . . . . . . . . . . . . . . 88-89Short-Length 8mm Pitch Poly Chain GT belt DrivesIntroduction . . . . . . . . . . . . . . . . . . . . . . 90Belt System Specifications . . . . . . . . . . . . . . 91Stock Belt Lengths and Widths . . . . . . . . . . . . 918mm Pitch Belt Drive Selection Tables . . . . . . 92-938mm Pitch Poly Chain GT Power Rating Tables . 94-96Engineering Data. . . . . . . . . . . . . . . . . . . 97Section I Application Design Considerations1. Gear Motors/Speed Reducer Drives . . . . 97-982. Electric Motor Frame Dimensions . . . . . . . 983. Minimum Recommended Sprocket Diametersfor General Purpose Electric Motors. . . . . . 994. High Driven Inertia Drives . . . . . . . . . . . 995. Air Moving Drives . . . . . . . . . . . . . 99-1006. Linear Motion Drives . . . . . . . . . . . . . 1007. High Performance Vehicle Applications . . . 1008. Belt Drive Registration. . . . . . . . . . 100-1019. Belt Drive Noise . . . . . . . . . . . . . . . 10110. Use of Flanged Sprockets . . . . . . . . . . 10111. Fixed (non-adjustable) Center Distance. 101-10212. Use of Idlers . . . . . . . . . . . . . . . . . 10213. Minimum Belt Wrap and Tooth Engagement . 10214. Adverse Operating Environments . . . . . . 103Section II Engineering Design Considerations1. Belt Storage and Handling . . . . . . . . . . 1032. Center Distance and Belt Length . . . . 103-1043. Belt Tooth Profiles . . . . . . . . . . . . . . 1044. Static Conductivity . . . . . . . . . . . . . . 1045. Sprocket Diameter and Speed . . . . . . . . 1056. Efficiency . . . . . . . . . . . . . . . . . . . 1057. Belt Tolerances. . . . . . . . . . . . . . . . 1068. Belt Installation Tension . . . . . . . . . 106-1079. Center Distance Allowancesfor Installation and Tensioning. . . . . . 107-10810. Drive Alignment . . . . . . . . . . . . . . . 10811. Belt Installation . . . . . . . . . . . . . . . . 10812. Belt Pull Calculations . . . . . . . . . . . . . 10913. Bearing/Shaft Load Calculations . . . . 109-11014. Self-Generated Tension . . . . . . . . . . . 110Technical DataTroubleshooting . . . . . . . . . . . . . . . . . 111-112Standard Calculations . . . . . . . . . . . . . . . . 113Useful Formulas and Calculations . . . . . . . 114-115Synchronous Belt Product Design Catalogs . . . 116Standard Synchronous BeltProduct Line Listing . . . . . . . . . . . . 116-130Belt Drive Application Examples . . . . . . . 131-134Copyright 2000The Gates Rubber CompanyDenver, Colorado 80217 Printed in U.S.A.ForewordSynchronous belts are being used more extensively than ever before in the industry where synchronization of one shaftspeed to another is of primary importance. The Gates Rubber Company has prepared this complete Poly ChainGTBeltDrive Design Manual to handle these exacting applications. Poly Chain drives also eliminate maintenance and noise prob-lems associated with chain drives and reduce maintenance required on other problem power transmission drives.Stock Belt Drives are presented in this manual for your convenience. If your drive requirements (Speed, Ratio, Center Dis-tance, Space, Horsepower) are not met, contact your local Gates representative.NOTE: Click on the desired item or page number to jump directly to that page.Synchronous belt drives are being used more ext ensively t hanever for t he t ransfer of power from one shaft t o anot her, mult iplicat ionof t orque, speed reduct ion or increase, and synchronizat ion of shaft operat ions.Gat es, t he world s recognizedleader in synchronous belt t echnology, cont inues t o meet all your needs for synchronous belt s,sprocket s and bushings across t he broadest range of indust r yapplicat ions. Choose from a fullline of qualit y product s feat uringleading-edge t echnologies t hat deliver t he advant ages you re looking for:Reduced downt i meReduced over-al l dri ve costReduced dri ve package si zeIncreased component l i feIncreased per formanceEnergy savi ngsReduced acqui si t i on cost sReduced t ransact i on cost sIncreased dri ve desi gn opt i onsNew, i mproved synchronous bel t l i nes.The lat est innovat ions in Gat essynchronous drive syst ems are t woredesigned and reengineered beltand sprocket lines. They are t heclear winners in overall cost , driveselect ion opt ions and per formancewhen compared t o any ot her beltdrive product s on t he market t oday.PowerGri p GT2The Racehorse. This is t he per formance choice for a wide variet y of high-speed (above 500 rpm) drive applicat ions. PowerGrip GT2 will deliver more power at a lower overall cost t han any ot her rubber synchronous belt drive syst em available. Pol y Chai n GT2The Workhorse. This is t he opt imal choice in meet ing your needs for low-speed (below 500 rpm), high-t orque drive applicat ions.The power ful Poly Chain GT2 polyuret hane belt drive syst em will out per form roller chain drives and any rubber belt drive syst em on t he market t oday, delivering t he lowest -cost belt drive syst em available for low-speed, high-t orque applicat ions.And we can prove i t !Low speed. Hi gh speed. And any speed i n bet ween.Gat es has your t ot al synchronous bel t dri ve syst em sol ut i on!qqqqqqqqq1Taper -Locksprocket s & bushi ngs.Poly Chain GT2 and PowerGrip GT2belt drive syst ems feat ure Taper-Lock bushings. Advant ages of t he Taper-Lock syst em include:Indust ry-proven robust nessTrue runni ng, concent ri cExt ensi ve use i n rol l er chai n sprocket sEasy i nst al l at i on and removalAl l ows compact sprocket hub desi gnsShor t l engt h-t hru-boredi mensi onsFl ush mount wi t h no prot rudi ng hubsInst al l s wi t h l ess axi al sprocket movement t hanot her bushi ng syst emsMade-t o-order sprocket s.Gat es Made-t o-Order (MTO) Met al Depar t ment suppor t s synchronous MTO sprocket s wit h90% of Request s For Quot e (RFQ) provided wit hin 48 hours and 84%of quot es provided wit hin 24hours. Quot ed deliver y dat es are met at a 97% rat e and mostdeliveries are made wit hin fourweeks. Call 800 -709 -6 0 01 for more informat ion.Gat es CompassCD-ROM:sel ect i on, mai nt enance, and desi gn t ool .The Gat es Compass CD-ROM is a power ful t ool of fering a variet y of useful informat ion andfeat ures. It makes choosing t heright drive syst em fast and easy.Compass cont ains Design FlexII,Design Viewand Design OHLforinvaluable assist ance in productselect ion, drive design, energy sav-ings calculat ions, inst allat ion andsyst em cost savings. The CD alsocont ains eight inst ruct ional videoscovering t opics such as belt drivet roubleshoot ing, t ensioning, safet yand inst allat ion. The Compass CD-ROM is available t hroughaut horized Gat es Indust rial Power Transmission Dist ribut ors.A par t nershi p commi t ment .To ensure t hat you get t he synchronous drive syst ems t hat are right for your applicat ions,Gat es provides t