Section 4: Synchronous Belt Drives

1 Section 4: Synchronous belt DrivesSection : 4 Offering high power transmission combined with accurate positioning in a compact drive envelope, Fenner Synchronous Drives continue to push out performance boundaries utilising the latest materials and production belt DRiveSSynchronous belt Drives : Design Data RequiredType of prime mover, or driving machineElectric motor starting arrangementRotational speed of prime moverPower rating of prime moverType of driven machineRotational speed of driven machinePower absorbed by driven machineHours/day duty & start/stop frequencyBoth driven & driver machine shaft diametersCentre distance & space restraints:> fixed centres?

2 Any environmental issues: > ambient temperature> noise limits> water, oil mist, solvents for the drive Design Assistant Comprehensive range of belt styles including Classical Timing Belts, HTD belts and Torque drive PLUS 3 (TDP3) Torque drive PLUS 3 (TDP3) anti-static as standard to ISO 9563 (1990) Absolute drive synchronism - no slippage Stock sizes to suit all applications ISO complianceSynchronous belt Drives PageTDP3 Belts 89 TDP3 drive Design 90 HTD Drives 93 HTD drive Design 94 Centre Distances TDP3 & HTD 96 TDP3 & HTD Pulleys 104 Classic Timing Belts & Drives 107 Classic Timing Pulley Dimensions 108 Installation Instructions.

3 All Drives 110 Fenner Torque drive Plus 388 Fenner Advanced chain technologytHe MARk oF engineeRing excellenceTorque drive PLUS 3 Premium Synchronous beltThe Compact, Quiet, Powerful Solution> Delivers the highest power rating from a rubber/glass fibre construction> compact drive pacakages> offers minimum backlash for precise positioning> operates with minimum noise levels> Runs optimally on standard HtD Package Comparisontorque drive PlUS 3 belts allow the design of lighter, more compact, more cost effective drive condition:Driver is a 45kW motor, 1460rev/min at 16hrs per machine is rotary gear pump 730rev/min 5%.

4 14 MxP - 55mm64 teeth32 teeth23kg72 teeth36 teeth42kg14M HtD - 115mm40 teeth20 teeth64kgxH - 178mmEnergy EfficientFenner Torque drive Plus 3 BeltsFen01/14 : drive DeSign & MAintenAnce MAnUAl89 Pitch lengthmm40mm WiDeCat. Code55mm WiDeCat. Code85mm WiDeCat. Code115mm WiDeCat. Code170mm WiDeCat. Code966286N0096286P0096286R0096286S00962 86T00961190286N0119286P0119286R0119286S0 119286T01191400286N0140286P0140286R01402 86S0140286T01401610286N0161286P0161286R0 161286S0161286T01611778286N0177286P01772 86R0177286S0177286T01771890286N0189286P0 189286R0189286S0189286T01892100286N02102 86P0210286R0210286S0210286T02102310286N0 231286P0231286R0231286S0231286T023124502 86N0245286P0245286R0245286S0245286T02452 590286N0259286P0259286R0259286S0259286T0 2592800286N0280286P0280286R0280286S02802 86T02803150286N0315286P0315286R0315286S0 315286T03153500286N0350286P0350286R03502 86S0350286T03503850286N0385286P0385286R0 385286S0385286T03854326286N0432286P04322 86R0432286S0432286T04324578286N0457286P0 457286R0457286S0457286T0457 Pitch lengthmm20mm WiDeCat.

5 Code30mm WiDeCat. Code50mm WiDeCat. Code85mm WiDeCat. Code480286J0048286K0048286L0048286M00485 60286J0056286K0056286L0056286M0056600286 J0060286K0060286L0060286M0060640286J0064 286K0064286L0064286M0064720286J0072286K0 072286L0072286M0072800286J0080286K008028 6L0080286M0080880286J0088286K0088286L008 8286M0088960286J0096286K0096286L0096286M 00961040286J0104286K0104286L0104286M0104 1120286J0112286K0112286L0112286M01121200 286J0120286K0120286L0120286M01201280286J 0128286K0128286L0128286M01281440286J0144 286K0144286L0144286M01441600286J0160286K 0160286L0160286M01601760286J0176286K0176 286L0176286M01761800286J0180286K0180286L 0180286M01802000286J0200286K0200286L0200 286M02002400286J0240286K0240286L0240286M 02402600286J0260286K0260286L0260286M0260 2800286J0280286K0280286L0280286M0280A Helically wound glass-fibre tensile member gives high tensile modulus and excellent fatigue Flexible, durable chloroprene backing polymer, encapsulates the tensile cords and protects them from contaminants and mechanical damage from idler pulleys on the back of the belt teeth are precisely formed and accurately spaced to ensure quiet, efficient engagement with pulley grooves.

6 They are made of medium hardness chloroprene and are bonded integrally with the belt backing. D Low friction woven nylon facing protects tooth surfaces from wear and aids quiet, efficient drive PlUS 3 BeltsThe three principal dimensions of a belt are:pitch pitch length widthand are used in this order as a designation pitch is the distance in millimetres between two adjacent tooth centres as measured on the pitch line of the belt . belt pitch length is the total length of the belt (circumference) in millimetres as measured along the pitch line.

7 The theoretical pitch line of a belt lies within the tensile drive Plus 3 belt performance is generally unaffected in ambient temperatures between 25OC and +100OC. Temperatures beyond these extremes should be referred to your local Authorised BASection : 4 Synchronous belt DRiveSTorque drive PLUS 3 Belts8mm PitcH (8 MxP) Belts14mm PitcH (8 MxP) Belts10001012345682003004005006008001002 0304050608010010,00020030040050060080010 1,0002030405060802,0003,0004,0005,0006,0 008,000 TDP3 14mmHTD 14mmTDP3 8mmHTD 8mmHTD 5mmSmall Pulley/Faster Shaft Speed rev/mincoMPARiSon oF HtD, toRQUe drive PlUS3 drive PoWeR RAtingSPower kWAnti-StAtic AS StAnDARDF enner torque drive PlUS 3 belts are static conductive to the definitive iSo 9563 (1990) as standard.

8 Fenner Torque drive Plus 3 drive Design90tDP3 drive Selection PRoceDURe1) Determine drive Requirementsa) The nature of the driving machine (usually the prime mover) and the driven machine and the duty cycle in ) The rotational speeds of the driving and driven ) The power capability and starting arrangements of the prime mover and the power absorbed by the driven ) The required drive centre distance and the machine shaft ) calculate Design PowerSelect a service factor from the table page 92.

9 Include an additional factor if the drive is speed normal running (absorbed) power by the service factor to give design power ) belt PitchUse the belt pitch selection guide - page 91 to select 8mm or 14mm pitch according to the point of intersection of the small pulley (faster shaft) rotational speed and the design power. If the intersection lies close to the 8/14mm pitch boundary, either pitch may be appropriate, attempt the design procedure on 8mm pitch first but be aware that later criteria may make 14mm ) Speed RatioDivide the rotational speed of the faster shaft (rev/min) by that of the slower shaft to determine speed ) Pulley SelectionRefer to the drive tables (pages 96-103) for the appropriate belt pitch.

10 From the first column select the required speed ratio and consult the next two columns for appropriate pulley groove alternative groove number pairs are available be aware that criteria in steps 6 & 7 may influence the ultimate any drive dimensional limitations by reference to pulley dimension tables on pages 104-106, noting that pulleys with up to 72 grooves may have flanges that determine the ) belt length & centre DistanceRead along the line in the drive table for the selected pulley groove number pair and select the centre distance closest to that required.