SYNCHRONOUS BELT DRIVES

Transcription

1 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

2 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 Power kw HTD 14mm HTD 8mm TDP2 14mm TDP2 8mm HTD 5mm 0.2 DRIVE PACKAGE COMPARISON MGT 85 mm 14M HTD 115 mm XH 178 mm Small Pulley/Faster Shaft Speed rev/min 2,000 3,000 4,000 5,000 6,000 8,000 10, 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

3 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 mm PITCH (14MGT) BELTS Pitch Length mm Belt Widths mm mm pitch belts 115mm and 170mm wide are non-stock. Consult Fenner Power Transmission Distributor for availability. Synchronous Belt Drives 165

4 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 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 Synchronous Belt Drives

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

6 & 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 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 Synchronous Belt Drives

7 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 * 9mm wide belts non-stock - Consult Fenner Power Transmission Distributor for availability. BELT PITCH SELECTION CHART Design Power (kw) Non-stock widths 100 HTD 14mm 0 HTD 8mm 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 * 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

8 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 = 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 M 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 M 85mm 170 Synchronous Belt Drives

9 HTD Drive Design POWER RATINGS (kw) FOR 15mm WIDE 5M BELT Rev/min of small pulley Number of grooves ,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, , 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, ,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, ,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, ,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, ,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, ,44 1,70 1,83 1,97 2,08 2, 2,44 2,70 3,16 3,57 4,01 4, ,81 2,12 2, 2, 2,55 2,70 3,01 3,31 3,80 4, 4,61 4, ,10 2,44 2,59 2,76 2,91 3,08 3,38 3,69 4, 4,54 4,80 4, , 2,70 2,87 3,04 3, 3, 3,67 3,93 4,35 4,55 4,59 4, ,76 3,10 3, 3,38 3,52 3,65 3, 3,97 3,97 3, ,99 3, 3,31 3, 3,44 3, 3,44 3, Belt length correction factors (multiplier) Belt Length (mm) 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 ,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, ,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, ,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, , 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, , 2,64 3,05 3,49 3,95 4,44 4,80 5, 5,63 6,44 7, 7,99 8, ,65 3,11 3,59 4,09 4,63 5, 5,63 6,12 6, 7,53 8,44 9, 10, ,65 4, 4,80 5,43 6,12 6, 7,16 7, 8,79 9,83 10,82 11, ,61 5, 5,95 6,70 7, 7, 8,44 9,61 10, 11,79 12, ,59 6,37 7, 8,11 8,74 9,47 10,17 11,53 12,80 13,99 15, ,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, , 12,75 13,70 14,68 15, 17,, ,08 16,09 16,99,47 Belt length correction factors (multiplier) Belt Length (mm) Belt width factors Belt width mm 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 , 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 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, ,00 10,80 11, 13, 15,10 17,00,,,,, , 12, 13,10 15,00 17,00,10,50,,70,80 29, , 12,50 13,50 15, 17,50,,00,10,,50, ,10 14,10 15,10 17,,50,80,,50,80 29,10 33, 14 15,70 16,80,,,10,70,90 29, 31, 35, ,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) Belt width mm 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

10 HTD 5M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley Ratio teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth , ,05 1, ,06 1, ,06 1, ,06 1, ,09 1, ,10 1, ,11 1,11 80 = ,11 1, ,12 1, ,13 1, ,13 1, ,13 1, ,14 1, ,14 1, ,16 1, ,17 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, ,29 1, ,29 1, ,29 1, ,29 1, ,33 1, ,33 1, , 1, ,38 1, , 1, , 1, ,41 1, ,41 1, ,43 1, ,43 1, ,45 1, ,47 1, ,50 1, ,50 1, ,56 1, ,56 1, ,57 1, , 1, ,61 1, ,64 1, ,65 1, ,67 1, ,68 1, ,70 All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. 1 Synchronous Belt Drives

11 HTD 5M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley Ratio teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth 1, ,71 1, ,75 1, ,75 1, ,78 1, ,80 1, ,82 1, ,88 1, ,88 1, ,89 1, ,89 2,00 56 = ,00 2, ,00 2, ,00 2, ,00 2, ,00 2, ,05 2, ,11 2, ,12 2, ,13 2, , 2, , 2, , 2, ,29 2, ,33 2, ,35 2, ,37 2, ,43 2, ,50 2, ,50 2, ,55 2, ,57 2, ,65 2, ,80 2, ,81 2, ,83 2, ,86 2, ,95 3, ,09 3, ,11 3, , 3, ,29 3, , 3, ,50 3, ,58 3, ,78 4, ,00 4, ,00 4, , 4, ,86 All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. Synchronous Belt Drives 173

12 8MGT & HTD 8M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley Ratio teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth , ,05 1, ,06 1, ,06 1, ,06 1, ,07 1, ,07 1, ,08 1, ,08 1, ,09 1, ,10 1, ,11 1, ,11 1, ,12 1, ,13 1, ,13 1, ,13 1, ,13 1, ,14 1, ,14 1, ,15 1, ,16 1, ,17 1, ,17 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, ,29 1, ,29 1, ,29 1, ,31 1, ,33 1, ,33 1, ,33 1, ,33 1, , 1, ,38 1, ,38 1, , 1, , All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. 174 Synchronous Belt Drives

13 8MGT & HTD 8M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley Ratio teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth 1, ,41 1, ,41 1, ,42 1, ,43 1, ,43 1, ,45 1, ,46 1, ,47 1, ,47 1, ,50 1, ,50 1, ,50 1, ,54 1, ,56 1, ,56 1, ,57 1, ,58 1, , 1, , 1, ,61 1, ,64 1, ,65 1, ,67 1, ,67 1, ,68 1, ,69 1, ,71 1, ,75 1, ,75 1, ,78 1, ,80 1, ,80 1, ,82 1, ,83 1, ,85 1, ,87 1, ,88 1, ,88 1, ,89 2, ,00 2, ,00 2, ,00 2, ,00 2, ,00 2, ,00 2, ,00 2, ,05 2, ,10 2, ,11 2, ,12 2, ,13 2, ,15 2, , 2, , 2, , 2, , 2, ,29 2, ,33 2, ,33 2, ,33 2, ,35 2, ,37 2, , 2, , 2, ,46 All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. Synchronous Belt Drives 175

14 8MGT & HTD 8M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley Ratio teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth 2, ,50 2, ,50 2, ,55 2, ,57 2, ,57 2, ,63 2, ,65 2, ,65 2, ,67 2, ,67 2, ,77 2, ,80 2, ,81 2, ,86 2, ,95 3, ,00 3, ,00 3, ,00 3, ,00 3, ,00 3, ,08 3, ,11 3, , 3, , 3, ,29 3, ,33 3, ,43 3, ,46 3, ,50 3, ,50 3, , 3, ,73 3, ,75 3, ,79 3, ,82 4, ,00 4, ,00 4, ,00 4, , 4, , 4, ,31 4, , 4, ,42 4, ,50 4, ,67 4, ,67 4, ,80 4, ,90 4, ,94 5, ,05 5, ,14 5, , 5, ,33 5, ,54 5, , 5, = ,65 6, ,00 6, ,00 6, ,00 6, , 6, ,46 6, ,86 All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. 176 Synchronous Belt Drives

15 14MGT & HTD 14M Drives CENTRE DISTANCE IN MILLIMETRES Number of grooves on Belt pitch length in millimetres Speed Driving Driven Speed Ratio Pulley Pulley Ratio teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth teeth , , ,04 1, ,05 1, ,06 1, ,06 1, ,06 1, ,07 1, ,07 1, ,09 1, ,10 1, ,10 1, ,11 1, ,12 1, ,13 1, ,13 1, ,14 1, ,14 1, ,16 1, ,17 1, ,17 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, , 1, ,29 1, ,29 1, ,29 1, ,31 1, ,33 1, ,33 1, ,33 1, , 1, ,38 1, ,38 1, , 1, ,41 1, ,43 All centre distances are rounded values Consult Fenner Power Transmission Distributor if centre distance is fixed. Synchronous Belt Drives 177