WIXLIB

TIMING PULLEYS& BELTS2012

INDEXFEATURES OF TIMING PULLEY DRIVESPage 3CLASSICAL TIMING PULLEY & BELT DRIVESPage 4Page 5 - 6Page 7 - 12Page 13 - 16CLASSICAL TIMING BELTSCLASSICAL TIMING PULLEYS PILOT BORECLASSICAL TIMING PULLEYS TAPER BOREHTD PULLEY & BELT DRIVESHTD TIMING BELTSHTD TIMING PULLEYS PILOT BOREHTD TIMING PULLEYS TAPER BOREGTR PULLEYS & GIGA TORQUE GX BELT DRIVESGIGA TORQUE GX TIMING BELTSGTR TIMING PULLEYS TAPER AND PILOT BOREMETRIC TIMING PULLEY & BELT DRIVESMETRIC ‘T’ TIMING BELTSMETRIC ‘T’ TIMING PULLEYS PILOT BOREMETRIC ‘AT’ TIMING BELTSMETRIC ‘AT’ TIMING PULLEYS PILOT BOREPage 17Page 18 - 21Page 22 - 29Page 30 - 35Page 36Page 37Page 38 - 41Page 42Page 43 - 45Page 46 - 50Page 51Page 52 - 55TIMING BELT CLAMP PLATESPage 56TAPER BUSHESPage 57USEFUL INFORMATIONPage 58All dimensions in mm unless otherwise statedAll descriptions and dimensions as published are believed to becorrect, but subject to the possibility of printing errors. The rightis reserved by us or our suppliers to alter or modify dimensions ordesigns without notice.PAGE 2&NAISMITH EngineeringManufacturing Co. Pty. Ltd.

Features of Timing Pulley DrivesTiming belts use teeth that mesh with grooves in a pulley to drive the system. There is no slippage,which will cause speed variations, allowing drives to be timed very accurately. The tensile cord, whichcould be made of many materials; Fibreglass, Steel, Carbon Fibre, or Kevlar, has minimal stretch sothe constant need for take up adjustment is removed.Unlike chain drives no lubrication is required on timing drives so maintenance is again reduced. Chaindrives require some form of lubrication, be it drip, splatter or fully enclosed oil bath. With timing beltdrives this is not required, saving on the initial set up cost of NOT installing a lubricating system butalso the cost of maintaining it.Timing drives will work over a very wide range of speed and torques, with some belts being capable ofspeeds up to 10,000 RPM. Torque ranges of between very light office equipment to heavy dutycrushing equipment up to several hundred kW are also capable of being driven by timing drives.Unlike flat and v-belt drives, timing drives do not rely on friction to produce drive. Slack side tensionis very low and the drive side tension is greatly reduced. As a result, the overall bearing loads arereduced and there is a better life expectancy for motors and bearings.Pulleys are available in a variety of materials such as Steel, Cast Iron, Aluminium and some areavailable in Plastic. All of the pulleys in this catalogue are kept on the shelf at Naismith Engineering. Ifyou require a special pulley with non-standard number of teeth or a special material, please contactNaismith Engineering and we will make it for you in our own factory.Belts are available in Rubber and Polyurethane depending on the style of belt. Special belts areavailable upon request. Please contact Naismith Engineering with your enquiries.&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 3

Classical Timing Pulley & Belt DrivesClassical timing belts offer a maintenance free and economical alternative toconventional drives like chains and gears. Capable of transmitting up to 100kW andspeeds of 10,000 rpm. Classical timing belts can be used in a wide range ofapplications from light duty office machinery to heavy duty industrial drives. Toselect a drive it is necessary to know the driver and driven shaft speeds, the demandpower, proposed centre distance and duty cycle. The chart below can be used toselect the optimum belt size for a drive. For further information or help in selectinga drive contact Naismith Engineering. Naismith Engineering stock the Optibeltrange of Classical timing 51050100kWOptiBelt ZR Timing BeltsNaismith Engineering stocks the OptiBelt range of Classical Timing belts. They are available off the shelf in XL (ExtraLight), L (Light), H (Heavy) & XH (Extra Heavy) in a large range of belt lengths. MXL (Mini Extra Light) & XXH (ExtraExtra Heavy) are available on request.&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 4

Classical Timing Belts XL & LPitch (inch) Pitch (mm)T XL68345.4360XL180914.4630XL3151600.2Standard widths of:-6.4mm (1/4") Code Length-XL0259.5mm (3/8") Code Length-XL037Long Length up to 12.7mm(1/2”) wide is available.Standard widths of:12.7mm (1/2") Code Length-L05019.1mm (3/4") Code Length-L07525.4mm (1")Code Length-L100Long Length up to 25.4mm(1”) wide is available.&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 5

Classical Timing Belts H & XHPitch (inch) Pitch (mm)T 236.35 350H70889.0750H1501905.0Standard widths of:-360H72914.4770H1541953.850.8mm (2") Code Length-XH200370H74939.8800H1602032.076.2mm (3") Code Length-XH300375H75952.5810H1622057.4101.6mm (4") Code 0H1702159.0Off standard widths are availableon ard widths of:19.1mm (3/4") Code Length-H07525.4mm (1")Code Length-H10038.1mm (1.1/2") Code Length-H15050.8mm (2")Code Length-H20076.2mm (3")Code Length-H300Long Length up to 50.8mm(2”) wide is available.&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 6

Type 1Type .01 Flange on boss side onlyPP11XL03725.0L100Suit 25.4mm wide belt (1")Part No.O.D. 5257.050.0C 17.01 Flange on boss side onlyBC 13.0Plastic with an Aluminium hubBC 30.01 Flange on boss side onlyL050Suit 12.7mm wide belt (1/2")Part No.O.D. TypeAPlastic with an Aluminium hubCBXL037Suit 9.5mm wide belt (3/8")Part No.O.D. TypeAO.D.Plastic with a Steel hubPlastic Timing PulleysXL Pitch 0.200“L Pitch 0.375“&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 7

XL 0.200“ Timing PulleysType 1Type 7Type 3AO.D.CBO.D.AO.D.CBCBXL037Suit 9.5mm wide belt (3/8")Part No.O.D. 25XL037F39.9125.022.5 9352.025.0AluminiumFlangedAluminiumC 14.3No FlangesA&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 8

L Pitch 0.375“ Timing PulleysAO.D.CBCBType 5AO.D.CBL100Suit 25.4mm wide belt (1")C 19.0 Part No.O.D. 0FlangedNo FlangesO.D.CB10L050FSteelACBL050Suit 12.7mm wide belt (1/2")Part No.O.D. TypeACast IronO.D.BC 32.0FlangedAO.D.Type 4No FlangesAType 3SteelType 2Cast IronType 1&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 9

H Pitch 0.500“ Timing PulleysAO.D.CBCBO.D.CBAO.D.CBH150Suit 38.1mm wide belt (1 1/2")C 33.0 Part No.O.D. .35120.070.0No FlangesCast IronFlangedSteelH100Suit 25.4mm wide belt (1")Part No.O.D. TypeABC 46.0FlangedAO.D.Type 5No FlangesAType 3SteelType 2Cast IronType 1&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 10

H Pitch 0.500“ Timing .098.0156H200629.35130.080.0Flanged63.318H200FNo Flanges16H200FCBBC 59.5SteelBO.D.H300Suit 76.2mm wide belt (3")Part No.O.D. TypeACast IronH200Suit 50.8mm wide belt (2")Part No.O.D. TypeAAC 85.7FlangedAO.D.Type 5No FlangesAType 3SteelType 2Cast IronType 1&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 11

XH Pitch 0.875“ Timing PulleysAO.D.O.D.ACBCBType 4XH300591.55160.0120.0No FlangesFlangedXH300Suit 76.2mm wide belt (3")C 65.0 Part No.O.D. TypeACast IronXH200Suit 50.8mm wide belt (2")Part No.O.D. TypeABC 92.0FlangedAType 4No FlangesType 2Cast IronType 1&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 12

L Pitch 0.375“ Timing PulleysO.D.AO.D.CBBCType 12AO.D.O.D.AO.D.CBType 16ACBO.D.BCType 14ABCAO.D.CBType 13Type 10AO.D.CBO.D.CBL050Suit 12.7mm wide belt (1/2")Part No.O.D Type BushL100Suit 25.4mm wide belt (1")C 19.0 Part No.O.D Type L100363.1142012110.032.0No FlangesCast IronFlangedAC 32.0FlangedAType 8Type 6No FlangesType 4Cast IronType 1&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 13

H Pitch 0.500“ Timing PulleysType 4Type 8Type 7O.D.AAO.D.CBBCType 12Type 13O.D.AO.D.ABCBCO.D.CBType 120.045.045.0No FlangesCast IronFlangedAC 45.0FlangedANo FlangesH150Suit 38.1mm wide belt (1 1/2")C 31.0 Part No.O.D Type BushCast IronH100Suit 25.4mm wide belt (1")Part No.O.D Type Bush&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 14

H Pitch 0.500“ Timing PulleysAO.D.BCBCO.D.ABCBCH300Suit 76.2mm wide belt (3")C 58.0 Part No.O.D Type 483.7152517120.045.0FlangedH200Suit 50.8mm wide belt (2")Part No.O.D Type BushNo FlangesCast IronO.D.C 84.0FlangedBCAType 15No FlangesO.D.O.D.Type 8Type 5Cast IronType 4Type 3&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 15

XH Pitch 0.875“ Timing PulleysType 4O.D.AAO.D.BCBCType 12Type 8Type 5Type 13AO.D.O.D.ABCBCO.D.CBType 9.0FG-84XH300591.5134040215.0102.0No FlangesC 90.0FlangedA4No FlangesB124.6Cast IronAFG-18XH200FFlangedXH300Suit 76.2mm wide belt (3")C 64.0 Part No.O.D Type BushCast IronXH200Suit 50.8mm wide belt (2")Part No.O.D Type Bush&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 16

HTD Pulley & Belt DrivesHTD timing belts offer optimised load distribution through the rounded tooth form,guaranteeing high power transmission in low speed and high torque applications.Capable of transmitting up to 300kW and speeds of 14,000 rpm. HTD timing beltscan be used in a wide range of applications from minimum drives like electronicpower tools to heavy duty machinery where durability and low maintenance isrequired. To select a drive it is necessary to know the driver and driven shaft speeds,the demand power, proposed centre distance and duty cycle. The Optibelt range oftiming belts in the chart below can be used to select the optimum belt size for adrive. For further information or help in selecting a drive contact M100100.010.11011001000kWOptibelt OMEGA HTD Timing BeltsNaismith Engineering stocks a large range of Optibelt OMEGA timing belts. Designed to be run with Standard HTDtiming pulleys the OMEGA belt is designed for high performance, smooth running and low noise drives. It can operate ina temperature range of -3 up to 100 degrees Celsius and is up to 98% efficient.Optibelt OMEGA HP HTD Timing BeltFaster, stronger and more compact, that is how the Optibelt OMEGA HP presents itself, a timing belt for high demandapplications. It can last up to 18 times longer and has up to twice the performance of the standard OMEGA belt. Due tothese great features it is possible to reduce the size of the drive system, saving both room and money.Optibelt OMEGA Fan Power HTD Timing BeltLong life, maintenance free, high power applications are very common requirements on heat exchanger fan applicationsin the oil industry where belts must perform to the highest standard. Belts must also be Antistatic to ISO9563. TheOptibelt OMEGA Fan Power belt is ideal for these applications.Optibelt OMEGA HL HTD Timing BeltOn drives with low belt speed, Optibelt OMEGA HL timing belts have 25% more capacity than the OMEGA HP belt. Inaddition, the design was optimized so that the OMEGA HL is much more suitable for shock loads.&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 17

HTD Timing Belts 3MTBeltBPitchLengthTeethPitch 500-3M5001500Standard widths of:-9mm Code Length-3M-0915mm Code Length-3M-15Long Length up to 15mm wideis available.&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 18

HTD Timing Belts 5MTBeltPitch 5M178890Standard widths of:-9mm Code Length-5M-0915mm Code Length-5M-1525mm Code Length-5M-25Long Length up to 25mm wideis available.&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 19

HTD Timing Belts 8MBTBeltPitchLengthTeethPitch 00-8M5504400Standard widths of:-20mm Code Length-8M-2030mm Code Length-8M-3055mm Code Length-8M-5085mm Code Length-8M-85Long Length up to 85mm wideis available.&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 20

HTD Timing Belts 14MTBPitch (mm)14M14mmTB6.00 10.00PitchTeeth 74578Standard widths of:-40mmCode Length-14M-4055mmCode Length-14M-5585mmCode Length-14M-85115mm Code Length-14M-115170mm Code Length-14M-170Long Length up to 85mm wideis available.&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 21

3M HTD Timing PulleysType 8Type it 15mm wide beltPart No.O.D. TypeAluminium3M-9Suit 9mm wide beltPart No.O.D. TypeFlangedCBCBCBAN.F.AAluminiumType 1N.F. - No Flanges&NAISMITH EngineeringManufacturing Co. Pty. Ltd.PAGE 22