Table of Contents - Rainbow Precision Products, Inc.

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Manufacturers Brand Name Cross ReferenceBeltStandard Specification Cross Section Bando MBL Dayco Optibelt Goodyear Thermoid GatesClassical Multiple V-Belt Super Blue Optibelt Prime MoverRMA IP-20 A, B, C, D, E Power King Conventional Ribbon VB Hy-T Plus Hi-Power IIB, C, D Power King Conventional Super Optibelt KB Torque Prime Mover Hi-Power IIBanded Combo Banded Vee-Band Kraftband Team Plus Banded Power BandAX, BX Power King Raw Edge Gold Label Optibelt Super Torque Prime Mover Tri-PowerCX, DX Cog Cogged Cog-Belt TX M-S Flex Cog Molded NotchBX, CX, DX Gold Label Torque CogBanded Cog Band Team BandedNarrow Multiple V-Belt Maxstar Power Hy-TRMA IP-22 3V, 5V, 8V Power Ace Wedge Wedge Optibelt-SK Wedge Maxi Power Super HCBanded3V, 5V, Power Ace Maxstar Optibelt-KB Hy-T Wedge Maxi Power Super HC8V Banded Combo Wedge Banded Wedge-Band Kraftband Torque Team Banded Power BandMaxstarOptibeltPower Ace Wedge Power-Wedge Super TX Hy-T Wedge Maxi Power Super HC3VX, 5VX, 8VX Cog Supreme Cog MS = S Cog Cog Molded Notch3VX, 5VX, 8VXMaxistartBanded Wedge Maxi Power Super HCSupreme Torque Team Cog Molded Notch(5VX Only) Wedge Banded Power BandLight Duty (FHP) V-Belt 2L, VC, DC FHPRMA IP-23 3L, 4L, 5L Duraflex GL FHP Durapower Optibelt-LD FHP Glasstex TruflexDouble-V Hex Belts AA, BB, Hex Hi-Power IIRMA IP-21 CC, DD Double V Double Double Angle Optibelt-DK Hex (Double V) Dubl-VVariable Speed V-Belts 12 Cross Variable Optibelt Variable VariableRMA IP-25 Sections Power Max Vari-Star Speed Cog Super VX Speed Speed Multi-SpeedV-Rib BeltsRMA IP-26 H, J, K, L, M Rib Ace Ribstar Poly-Rib Optibelt-RB Poly-V Multi-Ribbed Micro-VSynchronous Belts MXL, XL, L Three Stars PositiveRMA IP-24 H, XH, XXH Synchro-Link Timing Synchro-Cog Optibelt-2R Drive Grip-Tite Power GripDMXL, DXL, Synchro-Link Three Stars Synchro-Cog Optibelt-2R Dual Postive Grip-Tite Power GripDL, DH Double-Sided Dual Timing Dual DL Drive Dual Twin Power3M, 5M, 8M, Synchro-Link Power Grip14M, 20M HT High White Hawk HTDSynchro-Link Torque Synchro-Cog Optibelt-HTD Black Hawk Grip-Tite Poly-ChainXP Timing Panther Omega HPPD HT GTSynchro-LinkKPSS3M, S5M, Synchro-Link SuperS8M, S14M STS Torque PDSynchronous Belts T2, T2.5, T10,DIN 7721 T20, AT3, AT5, Synchro-Link OptibeltAT10, AT20 Polyurethane ZRMDT2.5, DT5 Synchro-LinkDT10, DT20 Double-Sided OptibeltPolyurethaneZRM-DLSingle Match System BAN/SET Set Free Chek-Mate S = C Matchmaker Sure-Set V-80119
Useful Formulas for V-Belt DrivesTorque to horsepowerconversionLoad requirements for a drive may be given in terms oftorque (turning effort) rather than horsepower. For drivedesign purposes, use the formulas below to converttorque (expressed as pound-inches or pound-feet) tohorsepower. Be sure to use the rpm of the shaft for whichthe torque is known, and do not mix the torque of oneshaft with the rpm of another shaft.Horsepower =Horsepower =(Torque, pound-inches) (rpm)63,025(Torque, pound-feet) (rpm)5,252Power to or from machineryWithout accurate horsepower requirement data for a drive,the formulas below may be used. Efficiency must beknown or estimated to use these formulas, and is shownas a decimal (i.e., if a pump is 75% efficient, use .75 in theformula). When a drive is providing power to a pump orgenerator, estimate a low efficiency for the driveNmachine. For power input to a drive from a motor or turbine,estimate a high efficiency for the driveR machine.A.C. MachineryKilowatts =(volts) (amps) (pf)YWhere: pf = power factorSingle phase: Y = 1000Three phase: Y = 577Power required for generator/alternatorHorsepower =(volts) (amps) (pf)(Z) (eff)Where: eff = overall mechanical and electrical efficiencypf = power factorSingle phase: Z = 746Three phase: Z = 431Power from motorHorsepower =(volts) (amps) (pf) (eff)ZWhere: eff = overall mechanical and electrical efficiencypf = power factorSingle phase: Z = 746Three phase: Z = 431D.C. MachineryKilowatts =(volts) (amps)1000Power required for generatorHorsepower =(volts) (amps)(746) (eff)Where: eff = overall mechanical and electrical efficiencyPower from motorHydraulic MachineryPower required by pumpsHorsepower = (Q) (P)1714 (eff)Where: Q = flow rate, gal./min.P = discharge pressure for pumps, inlet pressure forturbines, lb./sq. in.eff. = overall mechanical and hydraulic efficiencyPower from turbineHorsepower = (Q) (P) (eff)1714Where: Q = flow rate, gal./min.P = discharge pressure for pumps, inlet pressure forturbines, lb./sq. in.eff. = overall mechanical and hydraulic efficiencyV-Belt Tension FormulasEffective PullT 1 -T 2 = 33,000 ( HP )VWhere: T 1 = tight side tension, poundsT 2 = slack side tension, poundsHP = design horsepowerV = belt speed, feet per minuteT 1 +T 2 = 33,000 (2.5-G) ( HP )GVWhere: T 1 = tight side tension, poundsT 2 = slack side tension, poundsHP = design horsepowerV = belt speed, feet per minuteG = arc of contact correction factorTension RatioT 1 /T 2 =11-0.8G(Also, T 1 /T 2 = eK)Where: T 1 = tight side tension, poundsT 2 = slack side tension, poundsG = arc of contact correction factore = base of natural logarithmsK = .51230, a constant for V-belt drive designq = arc of contact in radiansTight Side TensionT 1 = 41,250 ( HP )GVWhere: T 1 = tight side tension, poundsHP = design horsepowerV = belt speed, feet per minuteG = arc of contact correction factorSlack Side TensionT 2 = 33,000 (1.25-G)( HP )GVWhere: T 2 = slack side tension, poundsHP = design horsepowerV = belt speed, feet per minuteG = arc of contact correction factorBelt SpeedV = PD (rpm) = (PD) (rpm) (.262)3.82Where: V = belt speed, feet per minutePD = pitch diameter of sheave or pulleyrpm = revolutions/minute of the same sheave or pulleyHorsepower = (volts) (amps)(746)Where: eff = overall mechanical and electrical efficiency120
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Table of ContentsDISTRIBUTION SALES
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Reference InformationService Expres
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Product PreviewPower King ® Cog an
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Product PreviewDuraflex GL ® CogBe
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Product PreviewBanFlex ®The small
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Product PreviewSynchro-Link ® Doub
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Product PreviewSynchro-Link ® STS
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Power King ® V-BeltsNominal Dimens
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C Section18BeltNo.BeltNo.BeltNo.Lis
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Power King ® Cog V-BeltsNominal Di
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Power Ace ® Cog V-BeltsNominal Dim
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Power King ® Combo V-BeltsD Sectio
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Power Ace ® Combo V-Belts5V Sectio
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Power Max ® Variable Speed BeltsBe
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Rib Ace ® BeltsNominal DimensionsJ
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Double V-BeltNominal DimensionsAA S
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Duraflex GL ® FHP V-BeltsNominal D
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Duraflex GL ® FHP V-Belts5L Sectio
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Ultrapower AG KC* BeltsB SectionBel
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Banflex ®Belts53 5M75 7M117 11M3M5
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Banflex ®Combo Belts5MS (2 and 3 R
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Banflex ®Combo Belts11MS (2 and 3
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Synchro-Link ®Timing Belts - Neopr
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Synchro-Link ®Timing Belts - Polyu
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Synchro-Link ®Double Sided Timing
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Synchro-Link ®Double Sided Timing
Page 70 and 71: Synchro-Link ® Double Sided Timing
Page 76 and 77: Synchro-Link ®HT Timing Belts - Ne
Page 83 and 84: Synchro-Link ®XP Timing Belts - Ne
Page 85 and 86: Synchro-Link ®XP Timing Belts - Ne
Page 87 and 88: Synchro-Link ®STS Timing Belts - N
Page 93 and 94: Synchro-Link ® Open-Ended Timing B
Page 95 and 96: Synchro-Link ® Minimum Plain BoreT
Page 101 and 102: Synchro-Link ® QD ® Timing Belt P
Page 111 and 112: Synchro-Link ® TL ® Timing Belt P
Page 113 and 114: Bushings for Synchro-Link ®Timing
Page 115 and 116: QD ®Bushings - Standard Bore & Key
Page 117 and 118: V-Belt InstallationProper installat
Page 119: Belt Troubleshooting GuideThis char
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