SYNCHRONOUS BELT DRIVES - PDF Free Download

Back to Contents TORQUE DRIVE PLUS 2 DRIVES NEW GENERATION TDP 2 BELTS LOW NOISE, MINIMUM BACKLASH, HIGH POWER DRIVE BELTS BELT RANGE DRIVE DESIGN PAGE 164 This state of the art, integrated range of synchronous belt drive components is capable of meeting almost any applicational requirement. HTD DRIVES BELT RANGE DRIVE DESIGN HTD PULLEYS PAGE 170 Including is the Fenner Torque Drive Plus 2. This product range comprises belts of the highest quality and power capacity in the industry. The belts are complemented by a versatile selection of standard pulleys, using the Taper-Lock shaft fixing creating highly efficient and compact synchronous drive systems. Fenner Power Transmission Distributor experience in the application of these products ensures cost-effective packages for all branches of industry. BELT RANGE DRIVE DESIGN PAGE 0 CLASSICAL TIMING DRIVES BELT TO ISO & BS STANDARDS TAPER-LOCK PULLEYS PAGE 3 INSTALLATION & MAINTENANCE Synchronous Belt Drives Design Data Required Type of prime mover, or driving m/c Electric motor starting arrangement Rotational speed of prime mover Power rating of prime mover Type of driven machine Rotational speed of driven machine Power absorbed by driven machine Hours/day duty & start/stop frequency Both driven & driving machine shaft diameters Centre distance & space restraints fixed centres or adjustments? Space restraints Any environmental issues ambient temperature noise limits water, oil mist, solvents etc. ALL DRIVES PAGE 1 Synchronous Belt Drives 163

offers; State of the art power ratings. Compact drive package - reduced weight. Quiet operation. Accuracy of positioning. Excellent tooth jump resistance. Runs on standard HTD pulleys. In the mid 90s, Torque Drive Plus (MR) was introduced to give significantly enhanced power capacity over HTD (M) belt drive systems, with lower noise levels and lower backlash. Continuous development work has now produced Fenner Torque Drive Plus 2, with all these attributes yet up to 50% further power capacity. Designated MGT, these belts are available in 8mm and 14mm pitches, with the same standard widths and lengths as HTD and TDP, and operate in standard HTD pulleys. They allow design of lighter, more compact, more cost-effective drive packages. Alternatively, their use on existing HTD or TDP drives will give longer service life. Torque Drive Plus 2 is the ultimate in rubber synchronous belts. COMPARISON OF HTD, TORQUE DRIVE PLUS 2 POWER RATINGS 1000 800 Power kw 0 500 0 0 0 100 80 50 10 8 6 5 4 3 2 1 0.8 0.6 0.5 0.4 0.3 HTD 14mm HTD 8mm TDP2 14mm TDP2 8mm HTD 5mm 0.2 DRIVE PACKAGE COMPARISON 0.1 14 MGT 85 mm 14M HTD 115 mm XH 178 mm 10 50 80 100 0 0 0 500 0 800 0 Small Pulley/Faster Shaft Speed rev/min 2,000 3,000 4,000 5,000 6,000 8,000 10,000 56 grooves grooves grooves grooves grooves kg 42 kg 64 kg grooves Drive Condition Driver: 45 kw motor Driven: Rotary gear pump 14 rev/min 7 rev/min ± 5% 16 hrs/day 164 Synchronous Belt Drives

Belts A Helically wound glass-fibre tensile member gives high tensile modulus and excellent fatigue life B Chloroprene backing polymer is flexible and durable. It encases, and is bonded to, the tensile cords and protects them from oil, moisture and other contaminents, and from wear if flat pulleys work on the back of the belt.. D A B C Belt teeth are precisely formed and accurately spaced to C ensure quiet, efficient engagement with pulley grooves. 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 running. TORQUE DRIVE PLUS 2 BELTS The three principal dimensions of a belt are: pitch pitch length width and are used in this order as a designation e.g. 8MGT-11-. Belt 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. The theoretical pitch line of a belt lies within the tensile member. TEMPERATURE Torque Drive Plus 2 belt performance is generally unaffected in ambient temperatures between O C and +100 O C. Temperatures beyond these extremes should be referred to Fenner Power Transmission Distributor. 8mm PITCH (8MGT) BELTS Pitch Length Belt Widths mm mm 0 5 0 50 6 85 7 800 880 9 10 11 10 10 14 10 17 00 00 20 00 14mm PITCH (14MGT) BELTS Pitch Length mm Belt Widths mm 6 10 55 10 85 1610 115 1778 170 90 00 10 50 90 00 3150 3500 3850 43 4578 14mm pitch belts 115mm and 170mm wide are non-stock. Consult Fenner Power Transmission Distributor for availability. Synchronous Belt Drives 165

Drive Design TDP2 DRIVE SELECTION PROCEDURE 1) Determine Drive Requirements a) The nature of the driving machine (usually the prime mover) and the driven machine and the duty cycle in hrs./day. b) The rotational speeds of the driving and driven machines. c) The power capability and starting arrangements of the prime mover and the power absorbed by the driven machines. d) The required drive centre distance and the machine shaft diameters. 2) Calculate Design Power Select a service factor from the service factor table page 168. Include an additional factor if the drive is speed increasing. Multiply normal running (absorbed) power by the service factor to give design power kw. 3) Belt Pitch Use the belt pitch selection guide - page 167 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 necessary. 4) Speed Ratio Divide the rotational speed of the faster shaft (rev/min) by that of the slower shaft to determine speed ratio. 5) Pulley Selection Refer to the drive tables (pages 1 to 179) for the appropriate belt pitch. From the first column select the required speed ratio and consult the next two columns for appropriate pulley groove numbers. Where alternative groove number pairs are available be aware that criteria in steps 6 & 7 may influence the ultimate selection. Consider any drive dimensional limitations by reference to pulley dimension tables on pages 0 to 2, noting that pulleys with up to grooves may have flanges that determine the o/dia. 6) Belt Length & Centre Distance Read along the line in the drive table for the selected pulley groove number pair and select the centre distance closest to that required. The standard belt length giving that centre distance is at the head of the column. If centre distance is critical, be aware that alternative groove number pairs may offer a closer value with standard belt lengths. 7) Power Rating & Belt Width Refer to the power rating table on page 167 for the chosen belt pitch, locate the small pulley groove number/rotational speed combination, and note the power rating (for the narrowest standard belt width). Multiply this rating by the belt length factor for the chosen belt length, from the listing beneath the main table. Divide the design power by the length corrected power rating, to give required belt width factor. Refer to the width factors below the rating table and select the belt width with a factor equal to or greater than required. 8) Shaft Sizes Check the bore capacity of the chosen pulleys against the pulley dimension tables on pages 0 to 2. If the pulleys will not accomodate the drive shafts it will be necessary to consider other pulley combinations, possibly using an alternative belt pitch. NOTE An optimum drive will use a belt of width factor just greater than that required. If alternative groove number pairs can give close to the required speed ratio, slightly larger pulley groove numbers may allow a narrower belt, or slightly smaller groove numbers may be possible with the same belt width. Larger diameter pulleys typically reduce bearing and shaft loads Avoid drives where the belt width exceeds the small pulley diameter. EXAMPLE 1) Drive Requirements a) AC cage rotor electric motor driving to a rotary gear pump. 16 hr/day. b) 14 rev/min motor, pump to run at 7rev/min +/ 5%. c) 55 kw motor, soft start no pump absorbed power given. d) Centres 800/850mm, motor shaft mm, pump shaft 75mm. 2) Design Power Service factor for medium duty, soft start, 16 hr day = 1.7. Design power = 1.7 x 55 = 94 kw. 3) Belt Pitch Pitch selection chart shows intersection of 14 rev/min and 94 kw to be within the capability of 14mm pitch. 4) Speed Ratio 14/7 = 1,97:1 A 2:1 ratio satisfies the +/ 5% criterion. 5) Pulley Selection From page 178; to 64 grooves is one combination giving 2:1 ratio. 6) Belt Length & Centre Distance A belt length of 10mm gives centres of 816mm. 7) Power Rating & Belt Width The power rating table shows a value of.37 kw for a groove pulley at 14 rev/min for a mm wide belt. Belt length factor for a 10mm belt = 1,0 - no change to power ratings. 94/.37 = 2,33. Next larger standard width factor = 2.5 for 85mm wide belt. 8) Shaft Sizes The -14M-85 pulley uses a 17 Taper-Lock bush, max. bore mm OK. The 64-14M-85 pulley uses a 35 Taper-Lock bush, max. bore 100mm OK. DRIVE SPECIFICATION Motor pulley: -14M-85 HTD pulley. Taper-Lock bush: 17/mm. Driven pulley: 64-14M-85 HTD pulley. Taper-Lock bush: 35/75mm. Belt: 14MGT-10-85 Torque Drive Plus 2 belt. DRIVE ORDERING INSTRUCTIONS A complete drive usually consists of five components: two pulleys, two Taper Lock bushes & one belt. 1) Pulleys. Are standard HTD pulleys. 2) Taper Lock bushes. Bush sizes are shown on the pulley dimension tables. 3) Belts. The drive selection above would be ordered as: Driving pulley -14M-85 Taper Lock bush 17/mm Driven pulley 64-14M-85 Taper Lock bush 35/75mm Belt 14MGT-10-85 166 Synchronous Belt Drives

Drive Design BELT PITCH SELECTION GUIDE 1000 800 0 500 0 0 Design Power kw 0 100 80 50 10 8 6 5 4 3 2 Non-stock widths TDP2 14mm TDP2 8mm 1 POWER RATINGS (kw) FOR mm WIDE 8MGT BELT Rev/min Number of grooves of small pulley 34 38 44 56 64 80 10 0,05 0,06 0,06 0,07 0,08 0,08 0,09 0,10 0,10 0,11 0,12 0,14 0,16 0, 0, 0, 0,09 0,11 0,12 0,13 0,15 0,16 0,17 0, 0, 0, 0, 0, 0,31 0, 0,41 0,46 50 0, 0, 0, 0,31 0,34 0,37 0,41 0,44 0,47 0,50 0,56 0,62 0,74 0,86 0,98 1,10 100 0,41 0,47 0,54 0, 0,66 0, 0,78 0, 0,90 0,95 1,07 1, 1,43 1,66 1,89 2,12 0 0,78 0,90 1,02 1,13 1, 1, 1, 1, 1,71 1,83 2,05 2, 2,73 3, 3,63 4,07 0 1,13 1, 1, 1,65 1,82 1,99 2,16 2,33 2,50 2,66 3,00 3,33 4,00 4,66 5,31 5, 0 1,47 1,70 1,92 2,15 2,37 2,59 2,82 3,04 3, 3, 3,92 4, 5, 6,10 6, 7,81 500 1,80 2,08 2, 2,64 2,91 3, 3,46 3,74 4,01 4, 4,83 5,37 6,44 7,51 8,57 9,62 0 2,12 2,45 2,79 3,12 3,45 3,77 4,10 4,43 4,75 5,07 5, 6, 7,63 8,91 10,16 11, 7 2,50 2,90 3,29 3,68 4,07 4,46 4,85 5, 5,62 6,01 6,77 7,53 9,04 10,55 12,04 13,51 800 2,75 3, 3,62 4,06 4,49 4,92 5,35 5,77 6, 6,62 7,47 8,31 9,97 11,64 13, 14,89 1000 3, 3,90 4,44 4,97 5,51 6,04 6,56 7,09 7,61 8,14 9, 10, 12, 14,31 16,,31 10 3, 4, 5, 5,87 6,50 7,13 7,76 8,38 9,00 9,62 10,86 12,08 14,51 16,93,,64 14 4, 5,49 6, 7,02 7,78 8,53 9, 10,03 10,78 11,52 13,00 14,47 17,37,,09,87 10 5,12 5, 6,79 7,63 8,45 9, 10,09 10,91 11, 12,53 14,13 15,73,88,03,08,10 00 5,69 6,62 7,56 8, 9, 10, 11, 12,14 13,05 13,95 15,74 17,51,01,50,89 31, 00 6, 7, 8,31 9,33 10,34 11,35 12, 13, 14, 15,35 17,,,11,93,63 34, 7,34 8,56 9,78 10,99 12, 13,38 14,57 15,75 16,93,09,41,70, 31,65 35,93,10 00 8, 9,81 11, 12,61 13,99 15, 16,73,08,43,76,41,03 31,14,17,97 45,61 29 8, 10, 11,64 13,08 14,52 15,95 17,,77,16,55,,00, 37, 42,43 47, 3500 10, 11,93 13,65 15,35 17,04,71,37,02,65,,46 31,59 37,67 43,56 00 11,45 13, 15,33 17,,14,02,87,,54.34 31,89 35,35 42,02 4500 12,66 14,82 16,,08,,,, 29, 31,29 35,16 38,92 5000 13.83 16,,55,86,15,,63 29,82 31,99 34,11 38, 42, 5500 14,97 17,55,08,59,05, 29,87, 34,53,80 41, Belt length correction factors (multiplier) Belt length mm 3-0 6-880 9-10 10-17 00-40 Length factor 0,8 0,9 1,0 1,1 1,2 POWER RATINGS (kw) FOR mm WIDE 14MGT BELT Belt width mm 50 85 Width factor 1,57 2,73 4,75 Rev/min Number of grooves of small pulley 34 38 44 56 64 80 10 0,41 0,45 0, 0,52 0,55 0,59 0,62 0,69 0,76 0,89 1,02 1,15 1, 0,78 0, 0,91 0,98 1,04 1,11 1,17 1, 1,43 1,68 1,93 2, 2,42 2,10 2, 2,46 2,64 2,82 3,00 3,17 3,53 3,87 4,56 5, 5,92 6,59 100 3,31 3, 3,89 4, 4,46 4,74 5,03 5,59 6,14 7, 8, 9,39 10,45 0 6,13 6,67 7, 7,75 8, 8,81 9,34 10,39 11,42 13, 15,50 17,49,46 0 8,75 9,53 10,31 11,09 11,85 12,62 13,38 14,89 16,38,33,,09,92 0 11, 12, 13, 14, 15, 16, 17,,,12,93,67, 35,99 500 13,66 14,90 16,13 17,35,56,77,97,34,69,33 34,88 39, 43,77 0 15,99 17,45,90,33,76,,58,38,13 35,57,90 46,14 51,29 7,71,42,12,81,49,15,80,08 35,31 41,67 47,91 54,01,01 800,,,,07,91 29,74 31,55 35,14 38,68 45,64 52,45 59,12 65,65 1000,77,06 29, 31,57 33,80,02 38, 42,56 46, 55, 63,43 71, 79,17 10,90 31,58 34,,86 39,47 42,06 44,62 49,69 54,67 64,42 73,87 83,02 91,89 14 34,06 37,,37 43,47 46,55 49,59 52,61 58,56 64,39 75,74 86,67 97,15 107, 10,75,17 43,56 46,91 50, 53,51 56,76 63,16 69,42 81,57 93, 104,29 114, 00,49 44,,00 51,70 55,34 58,95 62,51 69,52 76,35 89,55 102,07 113,90 00 44,13, 52,31 56,33,29 64, 68,06 75,64 83,00 97,12 110, 51,08 55,,53 65,15 69,69 74,16 78,56 87,13 95, 111,02 00 57,63 62,98 68, 73,38 78,43 83,39 88, 97,62 106,57 29 59,51 65,03 70,44 75,74 80,93 86,01 90,97 100,56 109,67 3500 68,14 74,37 80,45 86,37 92,12 97,70 103,11 00 74,89 81,64 88,17 94, 4500 8 88,14 Belt length correction factors (multiplier) Belt length mm 6-10 10-1610 1778-90 00-50 90-33 3500-68 Length factor 0,8 0,9 0,95 1,0 1,05 1,1 10 Belt width factors Belt width factors 50 80 100 Small Pulley/Faster Shaft Speed rev/min Belt width mm 55 85 115 170 Width factor 1,50 2,50 3,50 5, 0 0 0 500 0 800 0 2,000 3,000 4,000 5,000 6,000 8,000 10,000 Synchronous Belt Drives 167

& HTD Drives SERVICE FACTORS - for selecting both Torque Drive Plus 2 and HTD drives. TYPES OF DRIVEN MACHINE TYPES OF PRIME MOVER SPECIAL CASES 'Soft' Starts 'Heavy' Starts For speed increasing drives of: AC electric motors DC electric motors AC electric motors DC electric motors - 1, - no additional factor star/ delta start shunt wound DOL start series wound 1, - 1,74 - add 0,1 synchronous stepper motors single phase compound 1,75-2,49 - add 0,2 split wound slip ring servo motors 2,50-3,49 - add 0,3 inverter control 3,50 and greater - add 0,4 I/C engines with 4 or more cylinders. Prime movers I/C engines with < 4 cylinders with centrifugal clutches or fluid couplings. Seasonal / intermittent use - subtract 0,2 Idler pulley used on drive - add 0,2 Hours per day duty Hours per day duty 10 and Over 10 Over 16 10 and Over 10 under to 16 under to 16 Over 16 LIGHT DUTY Agitators (uniform density), Bakery machinery: Dough mixers, Blowers except positive displacement. Centrifugal pumps and compressors. Belt conveyors, (uniformly loaded). 1,2 1,4 1,6 1,6 1,8 2,0 Exhausters. Fans up to 7,5 kw. Paper machinery: Agitators, calenders, dryers, Printing machinery: Linotype machines, cutters, folders. Screens: Drum, conical. Woodworking machinery: Lathes, band saws. MEDIUM DUTY Agitators and Mixers (variable density), Belt conveyors (not uniformly loaded), Brick and clay machinery, augers, mixers, granulators. Fans over 7,5 kw. Generators, Line shafts. Laundry machinery. Punches, presses, shears. Printing 1,3 1,5 1,7 1,7 1,9 2,1 machinery: Presses, newspaper, rotary embossing, flat bed magazine. Pumps: Positive displacement, rotary. Screens, vibrating. Machine tools. HEAVY DUTY Blowers, positive displacement. Bucket elevators Centrifuges. Conveyors: Drag, pan, screw. Paper machinery: Beaters, jordans, mash pumps, 1,5 1,7 1,9 1,9 2,1 2,3 pulpers. Pumps, piston. Pulverizers. Woodworking machinery. Textile machinery. Exiters. EXTRA HEAVY DUTY Brick machinery, pug mills. Compressors, piston. Crushers: Gyratory, jaw roll. Hoists. Mills: Ball, rod, 1,7 1,9 2,1 2,1 2,3 2,5 tube, rubber. Rubber machinery: Calenders, extruders, mills. BELT DIMENSIONS. 5M HTD 8MGT & 8M HTD 14MGT & 14M HTD PULLEYS The three principal dimensions of a pulley are: number of grooves pitch width and are used in this order as a designation e.g. -8M-50. On the pulley, pitch is the distance between groove centres and is measured on the pulley pitch circle. The pitch circle of the pulley coincides with the pitch line of the belt running in it. The pulley pitch diameter is always greater than its outer diameter. Torque Drive Plus 2 belts run with standard Fenner Taper-Lock HTD pulleys. Standard pulley dimensions are listed in the tables on pages 0 to 2. 168 Synchronous Belt Drives

HTD Drives FENNER HTD This development of the original Timing Drive is offered in a range of pitches 5mm, 8mm and 14mm. Comprehensive choice of belt widths and lengths combine with an optimised range of Taper- Lock pulleys to suit general industrial needs. Drives can be designed by simple catalogue selection methods to give more compact drives, less noise and lower bearing loads than with classical Timing Drives. Fenner HTD drives offer the technical and economical benefits of an established product range with proven performance and world wide availability. Fenner HTD belts have a curvlinear tooth form giving a more uniform distribution of shear stresses within the teeth and a transition of tooth loads to the tensile members in the belt which significantly improves upon classical Timing Belts. 5mm (5M) PITCH HTD BELTS Pitch Length mm Belt Width mm 5 9 3 15 350 0 450 500 575 6 700 800 890 980 1100 10 14 1595 00 00 20 * 9mm wide belts non-stock - Consult Fenner Power Transmission Distributor for availability. BELT PITCH SELECTION CHART Design Power (kw) 0 100 80 50 10 8 6 5 4 3 2 1 0.8 0.6 0.5 0.4 0.3 0.2 0.1 0.08 0.06 0.05 0.04 0.03 0.02 0.01 10 50 80 Non-stock widths 100 HTD 14mm 0 HTD 8mm 0 0 500 0 800 HTD 5mm 0 Rev/Min of Faster Shaft 10,000 TEMPERATURE HTD belt performance is generally unaffected in ambient temperatures between O C and +100 O C. Temperatures beyond these extremes should be referred to Fenner Power Transmission Distributor. For storage, belts should be protected from moisture, temperature extremes, direct sunlight and high ozone concentrations. Belts should be stored avoiding sharp bends or crimping, which would damage the belts. 2,000 3,000 4,000 5,000 6,000 8,000 8mm (8M) PITCH HTD BELTS 14mm (14M) PITCH HTD BELTS Pitch Length mm Belt Width mm Pitch Length mm Belt Width mm 0 5 0 50 6 85 7 800 880 9 10 11 10 10 14 10 17 00 00 20 00 6 10 55 10 85 1610 115 1778 170 90 00 10 50 90 00 3150 3500 3850 43 4578 * 115mm and 170mm wide belts non-stock - Consult Fenner Power Transmission Distributor for availability. * 85mm wide belts non-stock - Consult Fenner Power Transmission Distributor for availability. Synchronous Belt Drives 169

HTD Drives SELECTION PROCEDURE (a) Speed Ratio Divide the rev/min of the faster shaft by the rev/min of the slower shaft to obtain the speed ratio. (b) Service Factor From the table (page 168) select the service factor which is applicable to the drive. If the drive is speed increasing an additional factor may be required. (c) Design Power Multiply the normal running power (kw) by the service factor. This gives the design power which is used as the basis for selecting the drive. (d) Belt Pitch Refer to the belt pitch selection chart on page 169. Choose the recommended belt pitch according to the point of intersection of the design power and the rev/min of the faster shaft. (e) Pulley Selection Refer to the drive tables (pages 1 to 179) for the pitch of belt selected in (d). From the first column select the required speed ratio. Reading along the same horizontal line the next two columns give the number of grooves on each pulley. Where more than one combination of pulleys is available consult the power ratings tables (page 171) and the list of stock belt widths (page 169). In conjunction with the design power found in (c) determine the most suitable pulley pair. (f) Centre Distance Using the relevant drive table read along the same horizontal line as that showing the pulley sizes, and select a centre distance nearest to that which is required. The belt required to give this centre distance is shown at the head of the column. (g) Belt Length Correction Factor From the table on page 171 note the correction factor for the pitch and length of belt chosen. (h) Power Rating Refer to the Power Ratings on page 171 for the pitch of belt being considered. Read down the left hand column to the speed of the small pulley in rev/min. On this line read across to the column headed by the number of grooves on the small pulley and note the basic power rating. Multiply this figure by the belt length correction factor (g) to obtain the actual power rating. (j) Belt Width Divide the Design Power found in step (c) by the actual power rating found in step (h) to obtain the belt width factor. Using the table below the power ratings, select a belt width which has a width factor equal to or greater than the figure found above. (k) Pulley Bores Refer to the pulley dimensions (pages 0 to 2) and check that the Taper Lock Bush sizes in the pulleys selected can accommodate the shafts they are to fit. (l) Pulley Ranges If standard pulleys are to be used, (i.e. those combinations shown in the selection tables) on the majority of drives it will be found that at least one pulley is flanged as standard. If nonstandard pulleys are to be used (i.e. combinations not shown in the selection tables) one pulley requires to be flanged, and it is usually more economical to flange the smaller one. If the centre distance exceeds 8 times the outside diameter of the small pulley, or if shafts are vertical, both pulleys should be flanged. EXAMPLE An HTD drive is required to drive a rotary pump at 685 rev/min. The prime mover is a kw, direct-on-line start AC motor, running at 14 rev/min. The required centre distance is 450mm, and each shaft diameter is 55mm. 16 hours per day. (a)speed Ratio 14 685 = 2,10:1. (b)service Factor From table (page 168) the service factor is 1,9. (c) Design Power Design Power = x 1,9 = 57kW. (d)belt Pitch From table on page 169, 14M is the most suitable pitch. (e)pulley Selection A speed ratio of 2,11 can be found in the drive tables on page 178 utilising pulleys of 38 and 80 grooves. (f) Centre Distance Reading along the same line as the 2,11:1 Speed ratio, a centre distance of 467mm is found, and at the head of the column the belt length given is 1778mm. (g)belt Length Correction Factor From table on page 171 Belt Length Correction Factor = 0,95. (h)power Rating From the power rating table the basic capacity of a 38 groove pulley at 14 rev/min is,70kw/mm width. Actual power rating =,70 x 0,95 =,41 kw. (j) Belt width 57 Belt Width Factor = = 2,33,41 From the width factor table beneath the power rating table it can be seen that the required width is 85mm. (k)pulley Bores From the pulley dimension tables, both pulleys are fitted with Taper-Lock Bushes which will accommodate 55mm bores. (l) Pulley Flanges The 38 groove pulley is flanged as standard. DRIVE SPECIFICATION 38 14M 85mm /55mm 80 14M 85mm 35/55mm 1778 14M 85mm HTD belt giving 467mm centres. ORDERING INSTRUCTIONS A complete drive usually consists of five components: two pulleys, two Taper-Lock bushes, and one belt. (1) Pulleys. The pulley code is given on the dimension pages 0 to 2. (2) Taper-Lock Bushes. Pages 0 to 2. (3) Belt. The belt code is given on page 169. Example: The drive selection above would be ordered as: Driving Pulley 38 14M 85mm Taper-Lock Bush /55mm Driven Pulley 80 14M 85mm Taper-Lock Bush 35/55mm Belt 1778 14M 85mm 170 Synchronous Belt Drives

HTD Drive Design POWER RATINGS (kw) FOR 15mm WIDE 5M BELT Rev/min of small pulley Number of grooves 34 38 44 56 64 80 0,02 0,02 0,02 0,04 0,04 0,04 0,04 0,04 0,06 0,06 0,06 0,08 0,04 0,06 0,06 0,06 0,06 0,08 0,08 0,09 0,09 0,11 0,13 0,15 0,06 0,08 0,08 0,09 0,09 0,09 0,11 0,13 0,15 0,17 0, 0, 100 0,09 0,11 0,13 0,13 0,15 0,17 0, 0, 0, 0, 0, 0, 0 0, 0, 0, 0, 0, 0, 0,38 0,43 0,51 0,59 0,64 0, 0 0, 0, 0, 0,38 0,42 0,43 0,51 0,57 0,68 0,77 0,87 0, 0 0,34 0, 0,43 0,47 0,51 0,55 0,62 0,70 0,83 0,95 1,06 1,17 500 0, 0,47 0,51 0,55 0,59 0,64 0, 0,81 0, 1,10 1, 1,38 0 0,45 0,55 0,59 0,62 0,68 0, 0,81 0,93 1,10 1, 1,42 1,57 7 0,51 0,62 0,66 0, 0,77 0,81 0,95 1,06 1, 1,42 1,61 1,78 800 0,57 0,66 0, 0,77 0,83 0,89 1,13 1,34 1,53 1, 1,91 9 0,64 0,76 0,79 0,83 0,89 0,95 1,15 1,29 1,53 1,74 1,95 2,15 1000 0,66 0,79 0,87 0,91 0,98 1,04 1, 1, 1,57 1,80 2,00 2, 10 0,76 0,89 0, 1,04 1,12 1, 1,34 1,49 1,78 2,02 2, 2,46 14 0,87 1,02 1,12 1, 1, 1, 1,53 1,70 2,00 2,29 2,57 2, 10 0,95 1,12 1, 1,29 1, 1,46 1,64 1,83 2,11 2,46 2,76 3,06 00 1,12 1, 1, 1,49 1,61 1,70 1,91 2,14 2,51 2,85 3, 3,52 1, 1,47 1,59 1,70 1,83 1,97 2,17 2, 2, 3, 3,57 3,93 80 1,44 1,70 1,83 1,97 2,08 2, 2,44 2,70 3,16 3,57 4,01 4,33 00 1,81 2,12 2, 2, 2,55 2,70 3,01 3,31 3,80 4, 4,61 4,91 5000 2,10 2,44 2,59 2,76 2,91 3,08 3,38 3,69 4, 4,54 4,80 4,95 00 2, 2,70 2,87 3,04 3, 3, 3,67 3,93 4,35 4,55 4,59 4,46 8000 2,76 3,10 3, 3,38 3,52 3,65 3, 3,97 3,97 3,55 10000 2,99 3, 3,31 3, 3,44 3, 3,44 3, Belt length correction factors (multiplier) Belt Length (mm) 5-0 450-500 575-800 890-10 10-20 Belt width factors Belt width mm 9 15 Correction Factor 0,8 0,9 1,0 1,1 1,2 Width factor 0,53 POWER RATINGS (kw) FOR mm WIDE 8M BELT Rev/min Number of grooves of small pulley 34 38 44 56 64 80 10 0,02 0,02 0,02 0,03 0,03 0,04 0,04 0,05 0,05 0,06 0,06 0,07 0,08 0,09 0,10 0,11 0,03 0,04 0,04 0,05 0,06 0,07 0,08 0,09 0,11 0,11 0,12 0,14 0,16 0, 0, 0, 50 0,08 0,09 0,11 0,13 0,16 0, 0, 0, 0, 0, 0,31 0,34 0, 0,45 0,51 0,56 100 0,16 0, 0, 0, 0,31 0, 0,41 0,47 0,54 0,56 0,62 0,68 0,79 0,90 1,02 1,13 0 0,33 0,37 0,45 0,53 0,62 0, 0,82 0,93 1,05 1,13 1, 1,34 1,54 1,73 1,93 2,12 0 0,49 0,53 0,65 0,77 0,90 1,04 1, 1,34 1,51 1,64 1,78 1,93 2, 2,50 2,77 3,05 0 0,65 0,71 0, 0,99 1,16 1,34 1,54 1,74 1, 2,12 2,31 2,50 2,87 3, 3,59 3,94 500 0,81 0,89 1,02 1, 1,42 1,64 1,88 2,13 2, 2,59 2,82 3,05 3,50 3,94 4,37 4,80 0 0.98 1.07 1. 1.43 1.68 1.94 2. 2.51 2.82 3.05 3. 3.59 4.11 4.63 5.13 5.63 7 1, 1,42 1,69 1,98 2, 2,61 2,94 3, 3,59 3,90 4, 4,83 5,43 6,02 6, 800 1,42 1,56 1,85 2,17 2,50 2,86 3, 3,64 3,94 4, 4,63 5, 5,95 6, 7, 9 2, 2,55 2,94 3, 3,81 4, 4,62 5,03 5,43 6, 6,97 7, 8,44 1000 2, 2,64 3,05 3,49 3,95 4,44 4,80 5, 5,63 6,44 7, 7,99 8,74 10 2,65 3,11 3,59 4,09 4,63 5, 5,63 6,12 6, 7,53 8,44 9, 10,17 14 3,65 4, 4,80 5,43 6,12 6, 7,16 7, 8,79 9,83 10,82 11,79 10 4,61 5, 5,95 6,70 7, 7, 8,44 9,61 10, 11,79 12,80 00 5,59 6,37 7, 8,11 8,74 9,47 10,17 11,53 12,80 13,99 15,08 00 7,69 8,69 9,77 10,52 11, 12,17 13,70 15,08 16, 17, 80 8,63 9,76 10,98 11,82 12,73 13,59 15, 16,58 17,76,69 3500 11, 12,75 13,70 14,68 15, 17,,47 00 15,08 16,09 16,99,47 Belt length correction factors (multiplier) Belt Length (mm) 0-0 6-880 9-10 10-17 00-00 Belt width factors Belt width mm 50 85 Correction Factor 0,8 0,9 1,0 1,1 1,2 Width factor 1,58 2,73 4,29 POWER RATINGS (kw) FOR mm WIDE 14M BELT Rev/min Number of grooves of small pulley 29 34 38 44 56 10 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,50 0, 0, 0, 0,50 0, 0, 0,70 0,70 0,80 0,90 1,10 0,70 0,80 0,80 1,10 1, 1, 1, 1, 1,80 2,10 1,10 1, 1, 1,50 1,70 1,90 2,00 2, 2, 2,70 3, 100 1,80 1,90 2,10 2, 2,80 3,10 3, 3, 4,00 4, 5, 0 3, 3,90 4, 4,80 5,50 6, 6,80 7, 8,00 8,90 10,50 0 4,90 5, 5,70 6, 7,50 8,50 9, 9,70 10,80 12,00 14, 0 6,10 6, 7,10 8, 9, 10,50 11, 12,00 13, 14,70 17, 500 7, 7,80 8, 9, 1 12, 13, 14,10 15, 17,, 0 8, 8,90 9,50 1 12,50 14,00 15,10 15,90 17,,,70 7 9, 10,10 10,80 12,50 14,10 15,80 17,00,00,80,80, 800 10,00 10,80 11, 13, 15,10 17,00,,,,,00 9 11, 12, 13,10 15,00 17,00,10,50,,70,80 29,80 1000 11, 12,50 13,50 15, 17,50,,00,10,,50,50 10 13,10 14,10 15,10 17,,50,80,,50,80 29,10 33, 14 15,70 16,80,,,10,70,90 29, 31, 35,50 10 17,80,,80,,10,,,90, 00,50,,00 29,,80,80 34,70 37, 00,90 29,70 31,,00 33, 34, 34, 80 29,80 31, 31,80,00 31,90 Belt length correction factors (multiplier) Belt width factors Belt Length (mm) 6-10 10-1610 1778-90 00-50 90-3150 3500-4578 Belt width mm 55 85 115 170 Correction Factor 0,8 0,9 0,95 1,0 1,05 1,1 Width factor 1,50 2,50 3,47 5, Note: The above table covers pulley sizes up to 56 grooves. Combinations are possible with larger sizes giving higher power ratings (to 0kW). Consult Fenner Power Transmission Distributor. Synchronous Belt Drives 171

HTD 5M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley 5 3 350 375 0 4 450 475 500 575 0 6 700 800 890 980 1100 10 14 Ratio 61 65 70 75 80 85 90 95 100 115 1 1 1 1 178 6 2 2 4 teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth 83 93 105 1 1 143 155 168 0 2 2 0 0 3 375 4 0 5 6 73 83 95 108 1 133 145 158 170 8 2 2 0 3 5 410 470 5 6 34 34 78 90 103 115 1 1 153 165 3 5 5 5 315 3 5 465 515 6 85 98 110 1 135 1 1 8 0 2 2 310 355 0 4 510 6 38 38 80 93 105 1 1 143 155 3 5 2 5 5 350 395 455 505 615 88 100 113 1 138 150 8 0 2 0 0 345 390 450 500 610 44 44 78 90 103 115 1 1 178 0 0 2 290 335 380 4 490 0 93 105 1 1 168 0 0 2 0 3 370 4 0 590 56 56 98 110 1 1 0 0 2 5 350 410 4 570 64 64 1 1 1 0 2 5 3 390 4 550 1 1 170 2 5 310 370 4 5 80 80 150 0 5 290 350 0 510 1,05 38 90 102 115 1 1 152 0 3 2 2 2 347 392 452 502 612 1,05 1,06 38 82 95 107 1 1 145 157 5 8 2 7 7 352 397 457 507 617 1,06 1,06 34 75 87 100 112 1 137 150 162 0 3 2 2 312 357 2 462 512 6 1,06 1,06 34 70 80 92 105 117 1 142 155 167 5 2 7 7 317 2 7 467 517 6 1,06 1,09 44 98 110 1 135 1 5 5 5 5 3 375 435 5 595 1,09 1,10 44 82 95 108 1 133 145 2 5 5 5 295 3 385 445 495 5 1,10 1,11 80 92 105 1 1 143 155 2 5 2 5 5 350 395 455 505 615 1,11 1,11 80 = 1 0 5 0 3 410 5 1,11 1,12 34 38 85 97 110 1 135 1 1 7 0 2 2 310 355 0 4 510 6 1,12 1,13 77 90 103 115 1 1 153 165 2 5 5 5 315 3 5 465 515 6 1,13 1,13 64 1 150 0 2 5 3 380 4 5 1,13 1,13 80 90 7 2 7 337 387 497 1,13 1,14 77 87 100 113 1 135 150 163 175 2 2 5 5 3 370 415 475 5 635 1,14 1,14 56 64 137 150 170 0 0 295 3 0 450 5 1,14 1,16 38 44 85 97 110 1 135 147 5 7 7 7 297 342 387 447 497 7 1,16 1,17 56 107 1 157 170 0 2 0 315 3 4 470 580 1,17 1, 34 82 95 107 1 1 145 157 5 7 2 7 7 352 397 457 507 617 1, 1, 38 75 87 100 112 1 137 150 162 0 2 2 2 312 357 2 462 512 6 1, 1, 77 90 102 115 1 1 177 0 0 2 290 335 380 4 490 0 1, 1, 34 75 85 97 110 1 135 147 1 1 0 2 2 2 2 7 412 4 5 6 1, 1, 44 87 100 112 1 137 150 7 0 2 0 0 345 390 450 500 610 1, 1, 85 97 110 1 135 147 1 7 0 2 2 310 355 0 4 510 6 1, 1, 64 80 1 139 170 2 5 310 370 4 5 1, 1, 90 147 7 2 7 347 397 507 1, 1, 38 80 92 105 117 1 142 0 2 2 2 292 337 382 442 492 2 1, 1, 44 56 87 100 112 1 162 175 5 2 5 3 5 4 475 585 1,29 1,29 82 95 107 1 1 145 157 170 7 2 2 0 3 465 410 470 5 6 1,29 1,29 56 1 139 159 0 2 5 3 390 4 550 1,29 1,29 34 44 90 102 115 1 1 152 0 2 2 2 2 347 392 452 502 612 1,29 1,33 82 95 107 1 1 145 2 5 5 5 295 3 385 445 495 5 1,33 1,33 64 97 109 147 1 0 0 2 5 350 410 4 570 1,33 1, 38 70 80 92 105 117 1 142 155 167 5 7 7 7 317 2 7 467 517 6 1, 1,38 44 79 92 105 117 1 142 155 2 5 2 5 5 350 395 455 505 615 1,38 1, 56 92 104 117 129 167 0 0 2 0 3 370 4 0 590 1, 1, 80 112 3 9 9 359 469 1, 1,41 64 90 6 2 297 357 7 517 1,41 1,41 34 97 109 1 135 147 5 7 7 7 297 342 387 447 497 7 1,41 1,43 77 89 102 115 1 1 152 165 2 5 5 5 315 3 5 465 515 6 1,43 1,43 56 80 129 149 179 9 4 3 380 4 5 1,43 1,45 44 64 101 114 152 164 4 4 5 310 355 415 465 575 1,45 1,47 38 56 94 107 1 1 169 2 2 2 2 3 3 4 2 592 1,47 1,50 87 99 112 1 137 149 7 0 2 0 0 345 390 450 500 610 1,50 1,50 1 149 169 9 9 294 339 0 450 5 1,50 1,56 56 109 1 134 1 4 4 4 3 3 375 435 5 595 1,56 1,56 112 167 3 8 3 9 475 1,56 1,57 44 97 109 1 134 147 159 7 0 2 2 310 355 0 4 510 6 1,57 1, 64 106 1 169 9 2 9 314 359 4 470 580 1, 1,61 56 90 135 165 6 1 6 7 417 5 1,61 1,64 44 141 153 174 4 4 299 344 4 454 565 1,64 1,65 34 56 98 111 1 1 174 7 7 7 297 3 377 437 7 597 1,65 1,67 80 1 138 158 8 9 4 9 389 439 549 1,67 1,68 38 64 108 1 159 171 1 2 2 317 2 4 4 582 1,68 1,70 80 1 5 6 3 438 1,70 All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. 1 Synchronous Belt Drives

8MGT & HTD 8M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley 0 5 0 6 7 800 880 9 10 11 10 10 14 10 17 00 00 20 00 Ratio 70 75 80 90 100 110 1 1 1 150 1 0 0 2 2 0 0 3 350 teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth 144 4 4 2 4 4 344 3 4 464 504 544 6 704 7 804 904 1104 14 14 1 176 6 6 6 2 3 376 416 456 4 5 616 6 776 7 8 10 16 12 1 168 8 8 2 8 3 8 8 4 8 5 8 688 768 788 888 1088 18 1 1 0 0 2 0 3 3 0 4 0 5 0 680 7 780 880 1080 10 10 112 152 1 2 2 2 312 352 392 4 4 512 592 6 752 7 8 10 11 12 34 34 104 144 164 4 2 4 4 344 3 4 464 504 5 664 744 764 864 1064 1164 14 1 176 6 6 2 3 376 416 456 4 576 656 7 756 856 1056 1 16 38 38 1 1 168 8 2 8 3 8 8 4 8 568 6 7 7 8 10 11 12 1 1 1 0 2 0 3 3 0 4 0 5 6 7 7 8 10 11 12 44 44 144 4 2 4 4 344 3 4 464 544 6 704 7 8 10 11 12 168 8 2 8 3 8 8 4 5 8 688 708 808 1008 1108 56 56 176 6 6 2 3 376 416 4 576 656 676 776 976 1076 1176 64 64 4 2 4 4 344 3 464 544 6 644 744 944 1044 1144 2 2 312 352 4 512 592 612 712 912 1012 1112 80 80 2 0 3 0 0 5 580 680 880 980 1080 1,05 38 1 144 164 4 4 4 4 4 4 444 4 564 644 7 744 4 1044 1144 14 1,05 1,06 38 1 152 1 2 2 292 3 3 412 452 492 5 652 7 752 852 1052 1152 12 1,06 1,06 34 1 1 0 2 2 0 3 380 4 4 500 580 6 7 7 8 10 11 12 1,06 1,06 34 108 1 168 8 2 8 8 3 388 4 468 508 588 668 7 768 868 1068 1168 18 1,06 1,07 116 176 6 2 6 316 356 3 4 476 516 5 676 756 776 876 1076 1176 16 1,07 1,07 1 164 4 4 4 4 4 4 4 444 4 5 4 6 764 7 8 10 14 14 1,07 1,08 1 1 2 2 2 292 3 3 412 452 492 5 612 692 7 792 892 1092 12 1292 1,08 1,08 1 0 0 2 2 0 3 380 4 4 500 5 6 700 780 800 900 1100 10 10 1,08 1,09 44 1 176 6 6 2 3 376 416 456 5 616 6 716 816 1016 1116 16 1,09 1,10 44 1 152 2 2 2 312 352 392 4 4 552 6 712 7 8 10 11 12 1,10 1,11 1 1 168 8 2 8 3 8 8 4 8 568 6 7 7 8 10 11 12 1,11 1,11 80 6 6 2 3 416 4 576 5 6 8 9 10 1,11 1,12 34 38 1 176 6 6 2 3 376 416 456 4 576 656 7 756 856 1056 1 16 1,12 1,13 104 144 164 4 2 4 4 344 3 4 464 504 5 664 744 764 864 1064 1164 14 1,13 1,13 64 8 2 8 3 8 4 5 8 6 7 9 10 11 1,13 1,13 80 90 2 0 380 4 5 5 6 8 9 10 1,13 1,13 34 112 152 1 2 2 2 312 352 392 4 4 512 592 6 752 7 8 10 11 12 1,13 1,14 1 1 0 0 2 0 3 3 0 4 0 5 0 680 7 780 880 1080 10 10 1,14 1,14 56 64 0 2 0 3 3 0 0 5 6 6 7 9 10 11 1,14 1,15 1 168 8 8 2 8 3 8 8 4 8 5 8 688 768 788 888 1088 18 1,15 1,16 38 44 1 6 2 6 316 356 3 4 476 556 6 716 7 8 10 11 12 1,16 1,17 1 176 6 6 6 2 3 376 416 456 4 5 616 6 776 7 8 10 16 12 1,17 1,17 56 152 2 2 2 312 352 392 4 512 592 6 692 792 992 1092 12 1,17 1, 34 1 152 1 2 2 292 3 3 412 452 492 5 652 7 752 852 1052 1152 12 1, 1, 38 1 1 0 2 2 0 3 380 4 4 500 580 6 7 7 8 10 11 12 1, 1, 108 1 168 8 2 8 8 3 388 4 468 508 588 668 7 768 868 1068 1168 18 1, 1, 144 4 2 4 4 344 3 4 464 544 6 704 7 8 10 11 12 1, 1, 34 116 176 6 2 6 316 356 3 4 476 516 5 676 756 776 876 1076 1176 16 1, 1, 44 1 1 1 0 2 0 3 3 0 4 0 5 6 7 7 8 10 11 12 1, 1, 1 164 4 4 4 4 4 4 4 444 4 5 4 6 764 7 8 10 14 14 1, 1, 1 1 2 2 2 292 3 3 412 452 492 5 612 692 7 792 892 1092 12 1292 1, 1, 1 176 6 6 2 3 376 416 456 4 576 656 7 756 856 1056 1 16 1, 1, 64 80 1 1 311 351 4 512 592 612 712 912 1012 1112 1, 1, 90 5 5 315 395 475 556 576 676 876 976 1076 1, 1, 38 1 147 8 2 8 8 3 388 4 468 5 6 708 7 8 10 11 12 1, 1, 38 103 144 164 4 2 4 4 344 3 4 464 504 5 664 744 764 864 1064 1164 14 1, 1, 44 56 159 9 2 0 3 3 0 4 5 0 680 700 800 1000 1100 10 1, 1,29 112 152 1 2 2 2 312 352 392 4 4 512 592 6 752 7 8 10 11 12 1,29 1,29 56 3 3 3 3 343 383 464 544 6 644 744 944 1044 1144 1,29 1,29 34 44 1 143 164 4 4 4 4 4 4 444 4 564 644 7 744 4 1044 1144 14 1,29 1,31 34 1 1 0 0 2 0 3 3 0 4 0 5 0 680 7 780 880 1080 10 10 1,31 1,33 1 168 8 8 2 8 3 8 8 4 8 5 8 688 768 788 888 1088 18 1,33 1,33 139 159 0 2 2 0 3 380 4 4 500 580 6 7 7 8 10 11 12 1,33 1,33 131 151 1 1 2 312 352 392 4 4 552 6 712 7 8 10 11 12 1,33 1,33 64 175 5 5 295 335 375 416 4 576 656 676 776 976 1076 1176 1,33 1, 38 107 147 168 8 2 8 8 3 388 4 468 508 588 668 7 768 868 1068 1168 18 1, 1,38 44 1 147 167 7 2 8 3 8 8 4 8 568 6 7 7 8 10 11 12 1,38 1,38 115 155 176 6 2 6 316 356 3 4 476 516 5 676 756 776 876 1076 1176 16 1,38 1, 56 167 7 7 7 3 7 7 4 5 8 688 708 808 1008 1108 1, 1, 80 112 334 414 494 514 615 815 915 1015 1, All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. 174 Synchronous Belt Drives

8MGT & HTD 8M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley 0 5 0 6 7 800 880 9 10 11 10 10 14 10 17 00 00 20 00 Ratio 70 75 80 90 100 110 1 1 1 150 1 0 0 2 2 0 0 3 350 teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth 1,41 64 90 0 290 3 411 491 571 591 691 891 991 1091 1,41 1,41 34 135 155 5 5 5 315 356 3 4 476 556 6 716 7 8 10 11 12 1,41 1,42 34 1 164 4 4 4 4 4 4 4 444 4 5 4 6 764 7 8 10 14 14 1,42 1,43 103 143 163 3 3 4 4 344 3 4 464 504 5 664 744 764 864 1064 1164 14 1,43 1,43 56 80 6 6 6 3 7 447 5 7 6 7 9 10 11 1,43 1,45 44 64 2 3 3 3 343 383 4 503 583 664 6 7 9 10 14 1,45 1,46 38 111 151 171 1 1 2 312 352 392 4 4 512 592 6 752 7 8 10 11 12 1,46 1,47 44 131 151 171 1 1 291 3 3 412 452 492 5 652 7 752 852 1052 1152 12 1,47 1,47 38 56 170 1 1 291 331 371 411 451 5 612 692 712 812 1012 1112 12 1,47 1,50 1 159 179 9 2 0 3 3 0 4 0 5 0 680 7 780 880 1080 10 10 1,50 1,50 1 139 159 9 9 9 3 359 399 4 0 5 6 7 7 8 10 11 12 1,50 1,50 8 8 8 3 359 399 479 559 639 659 759 9 10 11 1,50 1,54 107 147 167 7 2 7 7 3 388 4 468 508 588 668 7 768 868 1068 1168 18 1,54 1,56 56 134 174 4 5 295 335 375 415 455 535 615 6 716 816 1016 1116 16 1,56 1,56 112 7 3 429 509 5 6 8 931 1031 1,56 1,57 44 134 155 175 5 5 295 335 375 416 456 4 576 656 7 756 856 56 1 16 1,57 1,58 38 115 155 175 5 5 5 315 356 3 4 476 516 5 676 756 776 876 1076 1176 16 1,58 1, 1 142 162 3 3 3 3 3 3 443 3 564 644 7 744 4 1044 1144 14 1, 1, 64 149 0 2 0 310 351 391 431 511 591 671 691 791 992 1092 12 1, 1,61 56 90 2 4 5 345 4 506 586 6 707 907 1007 1107 1,61 1,64 44 164 5 5 6 3 6 6 7 567 647 667 767 7 1067 1167 1,64 1,65 34 56 137 178 2 8 299 339 379 4 459 539 6 699 7 8 10 11 12 1,65 1,67 110 151 171 1 1 1 311 351 391 4 4 512 592 6 752 7 8 10 11 12 1,67 1,67 80 179 2 1 1 342 382 462 542 6 643 743 943 1043 1143 1,67 1,68 38 64 152 3 4 4 314 354 395 435 515 595 675 695 795 995 1095 16 1,68 1,69 44 138 158 179 2 9 299 339 379 4 459 499 580 6 7 7 8 10 11 12 1,69 1,71 1 146 166 6 7 7 3 7 7 447 7 567 647 7 7 8 10 11 12 1,71 1,75 56 141 1 2 2 2 343 383 4 463 543 6 703 7 8 10 11 12 1,75 1,75 64 112 2 1 3 444 5 545 645 6 946 1046 1,75 1,78 64 7 7 8 3 358 398 439 5 599 679 699 799 999 1099 19 1,78 1,80 171 2 3 293 334 374 414 494 575 655 675 775 975 1075 1175 1,80 1,80 80 144 342 4 445 546 7 8 9 1,80 1,82 44 80 6 2 8 9 349 389 470 550 6 650 751 951 1051 1151 1,82 1,83 44 142 162 2 3 3 3 343 383 4 463 503 583 664 744 764 864 1064 1164 14 1,83 1,85 129 149 170 0 0 291 331 371 411 451 491 571 651 731 751 852 1052 1152 12 1,85 1,87 56 144 5 2 6 6 346 387 4 467 547 6 707 7 8 10 11 12 1,87 1,88 90 7 8 9 3 3 441 5 2 6 7 9 10 11 1,88 1,88 34 64 159 0 1 1 2 2 2 442 5 3 683 703 803 1003 1103 13 1,88 1,89 38 175 6 6 297 337 378 4 498 578 659 679 779 979 1079 1179 1,89 2,00 1 153 173 4 4 294 335 375 415 455 495 575 655 735 755 855 1056 1 16 2,00 2,00 56 1 1 9 9 0 310 350 390 431 471 551 631 711 731 831 1031 1131 11 2,00 2,00 64 163 4 5 5 3 6 6 446 5 7 687 707 807 1007 1107 17 2,00 2,00 178 2 2 1 341 381 4 502 582 662 682 783 983 1083 13 2,00 2,00 80 3 4 5 316 356 397 477 558 638 658 758 959 1059 1159 2,00 2,00 56 112 4 295 377 458 539 559 6 861 1 1062 2,00 2,00 144 356 438 459 561 762 863 4 2,00 2,05 44 90 4 5 6 3 7 4 529 9 629 7 9 10 11 2,05 2,10 80 168 7 388 491 695 7 897 2,10 2,11 38 80 7 8 9 3 3 0 1 561 642 662 762 3 1063 1163 2,11 2,12 34 2 3 4 4 345 385 4 506 586 666 686 787 987 1087 17 2,12 2,13 64 166 7 2 9 9 9 410 450 5 610 691 711 811 1011 1111 11 2,13 2,15 56 1 151 2 3 3 314 354 394 434 474 555 635 715 735 835 1035 1135 15 2,15 2, 80 0 2 2 3 4 4 5 565 646 666 766 6 1067 1167 2, 2, 5 2 7 8 3 389 429 509 590 670 690 790 991 1091 11 2, 2, 90 0 2 293 334 375 456 5 617 637 737 938 1038 1138 2, 2, 64 144 6 370 453 473 575 777 878 979 2, 2,29 64 170 1 2 292 333 373 413 454 534 614 694 715 815 1015 1115 15 2,29 2,33 56 134 155 6 2 7 317 358 398 438 478 559 639 7 739 839 1039 1139 19 2,33 2,33 112 2 8 9 392 473 554 574 675 876 977 1077 2,33 2,33 168 380 1 505 709 811 912 2,33 2,35 34 80 161 4 5 6 3 7 8 8 569 649 669 770 970 1070 1171 2,35 2,37 38 90 4 5 297 338 378 459 5 6 641 741 942 1042 1142 2,37 2, 146 8 2 1 311 352 392 433 513 594 674 694 794 995 1095 15 2, 2, 80 2 4 6 742 4 2, 2,46 64 131 173 5 5 2 337 377 417 457 538 6 698 7 8 10 11 12 2,46 All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. Synchronous Belt Drives 175

8MGT & HTD 8M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley 0 5 0 6 7 800 880 9 10 11 10 10 14 10 17 00 00 20 00 Ratio 70 75 80 90 100 110 1 1 1 150 1 0 0 2 2 0 0 3 350 teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth 2,50 80 165 7 2 290 3 371 411 492 573 653 673 774 974 1074 1174 2,50 2,50 90 7 9 0 341 382 463 544 6 644 745 946 1046 1146 2,50 2,55 44 112 2 4 316 399 0 561 582 683 8 9 1085 2,55 2,57 150 2 3 4 315 356 3 4 517 597 678 698 798 998 1099 19 2,57 2,57 56 144 299 3 467 7 589 792 893 994 2,57 2,63 64 168 394 415 5 7 8 9 2,63 2,65 34 90 178 2 2 4 345 385 467 547 6 6 749 949 1050 1150 2,65 2,67 64 134 177 2 9 0 3 381 4 461 542 6 702 7 8 10 11 13 2,65 2,67 80 168 0 2 293 334 375 415 4 576 657 677 777 978 1078 1178 2,67 2,67 2 446 654 757 858 2,67 2,77 153 5 7 8 3 359 0 4 5 1 681 702 802 1002 1102 13 2,77 2,80 112 8 1 3 6 7 569 589 690 891 992 1092 2,80 2,81 90 1 2 6 7 3 389 470 551 6 652 752 953 1053 1154 2,81 2,86 80 171 4 5 297 338 378 4 500 580 661 681 781 982 1082 12 2,86 2,95 38 112 2 4 3 9 491 5 593 694 895 9 10 2,95 3,00 9 2 1 2 3 3 444 5 5 685 705 806 1006 1106 16 3,00 3,00 90 4 2 9 311 352 393 474 555 635 656 756 957 1057 1157 3,00 3,00 144 312 397 0 501 4 807 908 1009 3,00 3,00 56 168 3 7 4 533 738 8 941 3,00 3,00 64 2 350 459 668 771 873 3,00 3,08 80 174 7 9 0 341 382 4 503 5 664 685 785 986 1086 16 3,08 3,11 112 5 8 3 413 495 576 5 697 899 999 1100 3,11 3, 90 7 2 3 314 355 3 477 558 639 659 7 1 1061 1161 3, 3, 44 144 3 4 7 508 611 814 915 1016 3, 3,29 34 112 4 2 291 333 416 498 579 0 701 903 1003 1104 3,29 3,33 80 178 2 2 4 345 385 4 507 588 668 688 789 989 1090 10 3,33 3,43 56 2 3 3 4 682 785 887 3,43 3,46 90 1 4 6 3 359 0 1 562 643 663 764 985 1065 1165 3,46 3,50 112 7 1 294 337 4 502 583 3 705 906 1007 1107 3,50 3,50 168 333 4 442 547 752 854 956 3,50 3, 144 3 411 494 515 6 8 9 10 3, 3,73 112 0 5 298 3 4 505 587 7 708 910 1011 1111 3,73 3,75 90 4 7 9 1 2 3 5 566 647 667 767 8 1069 1169 3,75 3,79 38 144 3 414 498 5 6 8 9 10 3,79 3,82 44 168 339 4 4 553 7 862 3 3,82 4,00 112 3 8 1 343 4 509 590 611 712 914 1014 1115 4,00 4,00 144 331 417 501 5 6 829 9 1031 4,00 4,00 2 352 375 5 6 799 901 4,00 4, 168 346 433 455 5 767 869 970 4, 4, 34 144 4 335 4 505 5 6 8 933 1035 4, 4,31 112 6 1 4 347 4 512 594 614 716 917 10 11 4,31 4, 44 2 358 381 492 703 806 908 4, 4,42 38 168 349 437 459 564 770 8 974 4,42 4,50 144 7 338 4 508 529 6 8 937 1038 4,50 4,67 112 2 4 8 350 434 516 597 6 7 9 10 11 4,67 4,67 168 352 4 461 567 774 876 978 4,67 4,80 144 0 341 4 511 5 635 839 941 1042 4,80 4,80 2 5 388 498 710 813 916 4,90 4,94 34 168 355 443 465 570 777 879 981 4,94 5,05 38 2 8 391 502 713 816 9 5,05 5,14 144 3 344 431 515 5 639 3 944 1046 5,14 5, 168 358 446 468 574 781 883 995 5, 5,33 2 371 394 505 716 8 9 5,33 5,54 144 6 3 434 5 539 642 7 9 1049 5,54 5, 168 1 450 471 577 7 887 988 5, 5,65 34 2 = 374 397 508 7 8 9 5,65 6,00 144 9 351 437 5 542 646 850 952 1053 6,00 6,00 168 9 4 453 475 581 785 890 992 6,00 6,00 2 377 0 511 7 8 9 6,00 6, 2 380 3 515 7 8 933 6, 6,46 168 2 8 478 456 5 791 894 9 6,46 6,86 2 383 6 5 7 834 937 6,86 All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. 176 Synchronous Belt Drives

14MGT & HTD 14M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley 6 10 10 1610 1778 90 00 10 50 90 00 3150 3500 3850 43 4578 Ratio 69 85 100 115 1 135 150 165 175 5 0 2 0 5 9 3 teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth 7 399 504 9 693 749 854 959 1029 1099 14 1379 1554 19 67 93 29 29 0 392 497 2 686 742 7 952 10 1092 17 13 1547 17 86 3 385 490 595 679 735 8 945 1015 1085 10 15 15 1715 53 79 9 371 476 581 665 7 8 931 1001 1071 1176 1351 15 1701 39 65 34 34 5 357 462 567 651 707 812 917 987 1057 1162 1337 1512 1687 51 1 343 4 553 637 693 798 903 973 1043 11 13 1498 1673 11 37 38 38 7 9 434 539 6 679 7 889 959 1029 1134 14 1659 97 3 315 4 5 9 665 770 875 945 1015 11 1295 1470 1645 83 09 44 44 7 392 497 581 637 742 7 917 987 1092 17 1442 1617 55 81 9 4 469 553 9 714 8 889 959 1064 19 1414 1589 53 56 56 8 413 497 553 658 763 833 903 1008 13 1358 1533 1771 97 1,03 29 6 388 493 598 682 738 3 9 10 1088 13 1543 17 56 82 1,04 29 3 395 500 5 689 745 850 955 10 1095 10 1375 1550 17 63 89 1,04 1,05 38 0 2 4 5 616 6 777 882 952 10 11 12 1477 1652 90 16 1,05 1,06 38 2 3 441 546 6 686 791 8 6 10 1141 1316 1491 1666 04 1,06 1,06 34 8 350 455 5 644 700 805 910 980 1050 1155 13 1505 1680 44 1,06 1,06 34 2 4 469 574 658 714 8 9 994 1064 1169 1344 15 1694 58 1,06 1,07 6 378 3 588 6 7 833 938 1008 1078 13 1358 1533 1708 46 1,07 1,07 0 392 497 2 686 742 7 952 10 1092 17 13 1547 17 86 1,07 1,09 44 3 378 3 567 6 7 833 903 973 1078 13 14 13 41 67 1,09 1,10 44 1 6 511 595 651 756 861 931 1001 1106 11 1456 1631 69 95 1,10 1,10 29 9 381 6 591 675 731 8 941 1011 1081 16 11 15 1711 49 75 1,10 1,11 7 9 434 539 6 679 7 889 959 1029 1134 14 1659 97 1,11 1,12 34 38 1 343 4 553 637 693 798 903 973 1043 11 13 1498 1673 11 37 1,12 1,13 5 357 462 567 651 707 812 917 987 1057 1162 1337 1512 1687 51 1,13 1,13 34 9 371 476 581 665 7 8 931 1001 1071 1176 1351 15 1701 39 65 1,13 1,14 3 385 490 595 679 735 8 945 1015 1085 10 15 15 1715 53 79 1,14 1,14 56 64 385 469 5 6 735 805 875 980 1155 13 1505 1743 69 1,14 1,16 38 44 8 413 5 2 658 763 868 938 1008 1113 1463 1638 76 02 1,16 1,17 56 3 441 5 581 686 791 861 931 10 11 1386 1 1799 1,17 1,17 29 34 2 374 479 5 668 7 829 934 1004 1074 1179 1354 1529 1704 42 68 1,17 1, 34 2 3 441 546 6 686 791 8 6 10 1141 1316 1491 1666 04 1, 1, 38 8 350 455 5 644 700 805 910 980 1050 1155 13 1505 1680 44 1, 1, 2 4 469 574 658 714 8 9 994 1064 1169 1344 15 1694 58 1, 1, 6 392 497 581 637 742 7 917 987 1092 17 1442 1617 55 81 1, 1, 34 6 378 3 588 6 7 833 938 1008 1078 13 1358 1533 1708 46 1, 1, 44 2 314 4 5 9 665 770 875 945 1015 11 1295 1470 1645 83 09 1, 1, 29 5 7 4 577 661 717 8 9 997 1067 11 1347 15 1697 35 61 1, 1, 2 343 4 553 637 693 798 903 973 1043 11 13 1498 1673 11 37 1, 1, 38 293 398 504 588 644 749 854 9 994 1099 14 1449 16 62 88 1, 1, 38 4 357 462 567 651 707 812 917 987 1057 1162 1337 1512 1687 51 1, 1, 44 56 4 349 454 538 594 699 805 875 945 1050 12 10 1575 13 39 1, 1,29 8 371 476 581 665 7 8 931 1001 1071 1176 1351 15 1701 39 65 1,29 1,29 56 355 4 4 1 706 776 6 951 11 12 1477 1715 41 1,29 1,29 34 44 9 1 4 5 616 6 777 882 952 10 11 12 1477 1652 90 16 1,29 1,31 29 38 2 3 465 570 654 710 815 9 990 10 1165 13 1515 1690 54 1,31 1,33 7 349 454 5 644 700 805 910 980 1050 1155 13 1505 1680 44 1,33 1,33 0 5 510 594 650 756 861 931 1001 1106 11 1456 1631 69 95 1,33 1,33 64 6 411 4 552 657 762 8 902 1007 12 1358 1533 1771 97 1,33 1, 38 1 3 468 574 658 714 8 9 994 1064 1169 1344 15 1694 58 1, 1,38 44 5 3 433 538 6 678 7 889 959 1029 1134 14 1659 97 1,38 1,38 29 2 353 458 563 647 703 808 913 983 1053 1158 1333 1508 1683 47 1,38 1, 56 7 2 468 552 8 713 8 888 958 1063 18 1414 1589 53 1, 1,41 34 6 412 517 1 657 762 867 937 1008 1113 1463 1638 76 02 1,41 1,43 4 356 461 566 650 706 812 917 987 1057 1162 1337 1512 1687 51 1,43 All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. Synchronous Belt Drives 177