Megatorque

Megatorque
Megatorque Megatorque

1. Tooth reinforcement made of nylon, 2. Strengthened glass fibre tensile cord, 3. Belt teeth made of hydrogenated nitrile butadiene rubber (HNBR), 4. Belt backing made of HNBR

Even with the SuperTorque high-powered timing belt, Mitsuboshi succeeded in breaking new ground and introducing new standards in drive technology. These heights have now been taken to an even higher level: with the new MegaTorque - distributed by Krebs & Kessel! Doubled performance, an even bigger helping of reliability, longer service lifespan and a marked increase in efficiency are the superlative hallmarks of this innovational generation of timing belts. They herald in even more efficiency in countless fields of application - they guarantee optimal results under all kinds of conditions.

KK-Select download

Advantages gained by the tooth geometry of the new MEGATORQUE

Harmonious tooth geometry is by its very nature the overriding recipe for success in a top-flight belt. And in this respect the new MegaTorque stands out in the crowd with some very lucid facts in its favour:

  1. Round edges allow smooth meshing of the teeth
    Large tooth volume and 50% more teeth in the mesh than is found with comparable standard timing belts
  2. Reduced shear force as a result of more even stress distribution on teeth
  3. High jumping torque and superior smoothness
  4. Power transmission showing almost no play and with SE toothed lock washers
Advantages gained by the tooth geometry of the new MEGATORQUE
Code mm hs hd ht t s ra rr r Effective pitch distance mm
MTS8M 8,00 5,30 7,47 3,05 2,25 5,20 0,80 0,80 5,20 0,686
MTS14M 14,00 10,20 13,39 5,30 4,90 9,10 1,40 1,40 9,10 1,397
Effective belt length
mm		 length tolerance
mm		 Centre distance
mm		 Measurement y*
> 254 up to 381 ± 0,46 ± 0,23 15
> 381 up to 508 ± 0,50 ± 0,25 15
> 508 up to 762 ± 0,60 ± 0,30 15
> 762 up to 1016 ± 0,66 ± 0,33 15
> 1016 up to 1270 ± 0,76 ± 0,38 15
> 1270 up to 1514 ± 0,81 ± 0,405 15
> 1524 up to 1778 ± 0,86 ± 0,43 15
> 1778 up to 2032 ± 0,92 ± 0,46 15
> 2032 up to 2286 ± 0,96 ± 0,48 15
> 2286 up to 2540 ± 1,02 ± 0,51 15
> 2540 up to 2794 ± 1,06 ± 0,53 15
> 2794 up to 3048 ± 1,12 ± 0,56 15
> 3048 up to 3302 ± 1,17 ± 0,585 15
> 3302 up to 3556 ± 1,22 ± 0,61 15
> 3556 up to 3810 ± 1,27 ± 0,635 15
> 3810 up to 4064 ± 1,37 ± 0,81 15
> 4064 up to 4318 ± 1,42 ± 0,685 15
> 4318 up to 4572 ± 1,52 ± 0,71 15
> 4572 up to 5012 ± 1,62 ± 0,76 15
*If mounting conditions are difficult, the centre distance should be able to be reduced by the amount of "y" so that the timing belt can be fitted easefully. And balancing of the centre distance tolerance given ought to be possible in every situation.
Timing belt width
mm		 Width tolerance for belt length mm
< 351 > 351 - 840 > 840 - 1680 > 1680
< 10 + 0,3 + 0,3 + 0,6
- 0,6 - 0,6 - 0,6
> 10 - 40 + 0,8 + 0,8 + 0,8 + 0,8
- 0,8 - 0,8 - 1,2 - 1,2
> 40 - 50 + 0,8 + 1,2 + 1,2
- 0,8 - 1,6 - 1,6
> 50 - 75 + 1,6 + 1,6
- 2,0 - 2,0
> 75 - 100 + 2,0 + 2,0
- 2,0 - 2,0
> 100 + 2,4 + 2,4
- 3,2 - 3,2
Profile code Belt thickness/Tolerance mm
S1 S2  
MTS8M 5,3 ± 0,20 2,25 ± 0,20  
MTS14M 10,20 ± 1,00 4,90 + 1,00  
-0.8  

MegaTorque Order Reference

MegaTorque Order Reference
Belt no. Teeth no. Effective belt length
mm
MTS8M 560 G 70 560
MTS8M 854 G 73 584
MTS8M 600 G 75 600
MTS8M 632 G 79 632
MTS8M 640 G 80 640
MTS8M 656 G 82 656
MTS8M 680 G 85 680
MTS8M 712 G 89 712
MTS8M 720 G 90 720
MTS8M 760 G 95 760
MTS8M 800 G 100 800
MTS8M 824 G 103 824
MTS8M 848 G 106 848
MTS8M 880 G 110 880
MTS8M 896 G 112 896
MTS8M 976 G 122 976
MTS8M 984 G 123 984
MTS8M 1000 G 125 1000
MTS8M 1024 G 128 1024
MTS8M 1040 G 130 1040
MTS8M 1056 G 132 1056
MTS8M 1080 G 135 1080
MTS8M 11220 G 140 1120
MTS8M 1128 G 141 1128
MTS8M 1136 G 142 1136
MTS8M 1160 G 145 1160
MTS8M 1200 G 150 1200
MTS8M 1248 G 156 1248
MTS8M 1256 G 157 1256
MTS8M 1280 G 160 1280
MTS8M 1304 G 163 1304
 MTS8M 1320 G 165 1320
MTS8M 1352 G 169 1352
MTS8M 1360 G 170 1360
MTS8M 1400 G 175 1400
MTS8M 1424 G 178 1424
MTS8M 1440 G 180 1440
MTS8M 1448 G 181 1448
MTS8M 1480 G 185 1480
MTS8M 1520 G 190 1520
MTS8M 1600 G 200 1600
MTS8M 1640 G 205 1640
MTS8M 1648 G 206 1648
MTS8M 1680 G 210 1680
MTS8M 1696 G 212 1696
MTS8M 1728 G 216 1728
MTS8M 1760 G 220 1760
MTS8M 1776 G 222 1776
MTS8M 1800 G 225 1800
MTS8M 1816 G 227 1816
MTS8M 1832 G 229 1832
MTS8M 1880G 235 1880
MTS8M 1912 G 239 1912
MTS8M 2000 G 250 2000
MTS8M 2040 G 255 2040
MTS8M 2048 G 256 2048
MTS8M 2160 G 270 2160
MTS8M 2240 G 280 2240
MTS8M 2272 G 284 2272
MTS8M 2304 G 288 2304
MTS8M 2376 G 297 2376
MTS8M 2400 G 300 2400
MTS8M 2496 G 312 2496
MTS8M 2600 G 325 2600
MTS8M 2800 G 350 2800
MTS8M 2920 G 365 2920
MTS8M 3048 G 381 3048
MTS8M 3200 G 400 3200
MTS8M 3272 G 409 3272
MTS8M 3680 G 460 3680
MTS8M 4400 G 550 4400
Belt no. Teeth no. Effective belt length
mm
MTS14M 1008 G 72 1008
MTS14M 1120 G 80 1120
MTS14M 1190 G 85 1190
MTS14M 1246 G 89 1246
MTS14M 1400 G 100 1400
MTS14M 1540 G 110 1540
MTS14M 1610 G 115 1610
MTS14M 1750 G 125 1750
MTS14M 1778 G 127 1778
MTS14M 1806 G 129 1806
MTS14M 1890 G 135 1890
MTS14M 1932 G 138 1932
MTS14M 2002 G 143 2002
MTS14M 2100 G 150 2100
MTS14M 2198 G 157 2198
MTS14M 2240 G 160 2240
MTS14M 2310 G 165 2310
MTS14M 2380 G 170 2380
MTS14M 2450 G 175 2450
MTS14M 2506 G 179 2506
MTS14M 2590 G 185 2590
MTS14M 2660 G 190 2660
MTS14M 2800 G 200 2800
MTS14M 3150 G 225 3150
MTS14M 3500 G 250 3500
MTS14M 3556 G 254 3556
MTS14M 3850 G 275 3850
MTS14M 4004 G 286 4004
MTS14M 4508 G 322 4508
MTS14M 5012 G 358 5012

When it comes to synchronised belts, the toothed profile of the MegaTorque top-performance timing belt is a patented innovation. The gaps between the teeth on the pulley washers of the MegaTorque, high-powered belt differ from those on previously designed profiles.

Because of its special shape, the profile formed by the spaces between the teeth guarantees optimal meshing of the timing belt teeth. The depth of the space between each tooth is less than the height of the teeth making up the MegaTorque high-powered belt. And this, together with the arched curvature of the gap between each pulley washer, means that tension is spread more evenly over the entire stretch of belt teeth.

Tooth Lock Washers with SE Tooth System

For all those timing belt drives which demand the highest level of synchronicity, such as

  1.  Robots
  2. Handling devices
  3. Machine tool feeds
  4. Printing machines
  5. Writing computers
  6. Optical readers

and the like, we recommend washers with an SE tooth design. The gaps between the teeth, which are meticulously formed by means of special milling machines, enable the MegaTorque timing belt drive to be virtually free of any kind of play. This SE tooth system is available for the standard profiles of S2M, S3M, S4.5M, S5M, S8M and S14M.

Zeichnung A Zeichnung B Zeichnung C
Width code Belt width mm Pulley width (F) mm  
0150 15 24  
0250 25 35  
0400 40 51  
0600 60 72  
       
       
       
Pulley code Effective diameter mm Outer diameter mm Model
18S8M 45,84 44,46 A ∙ B
19S8M 48,38 47,01 A ∙ B
20S8M 50,93 49,56 A ∙ B
21S8M 53,48 52,10 A ∙ B
22S8M 56,02 54,65 A ∙ B
24S8M 61,12 59,74 A ∙ B
26S8M 66,21 64,84 A ∙ B
28S8M 71,30 69,93 A ∙ B
30S8M 76,39 75,02 A ∙ B
32S8M 81,49 80,12 A ∙ B
34S8M 86,58 85,21 A ∙ B
36S8M 91,67 90,30 A ∙ B
40S8M 101,86 100,49 A ∙ B
44S8M 112,05 110,67 A ∙ B
48S8M 122,23 120,86 A ∙ B
50S8M 127,32 125,95 A ∙ B
60S8M 152,79 151,42 A ∙ B
72S8M 183,35 181,97 C
84S8M 213,90 212,53 C
96S8M 244,46 343,09 C
120S8M 305,58 304,21 C
144S8M 366,69 365,32 C
Zeichnung A Zeichnung B Zeichnung C
Width code Belt width mm Pulley width (F) mm  
0400 40 56  
0600 60 77  
0800 80 98  
1000 100 119  
1200 120 140  
     
     
       
Pulley code Effective diameter mm Outer diameter mm Model
28S14M 124,78 121,98 A ∙ B
30S14M 133,69 130,90 A ∙ B
32S14M 142,60 139,81 A ∙ B
34S14M 151,52 148,72 A ∙ B
36S14M 160,43 157,63 A ∙ B
40S14M 178,25 175,46 A ∙ B
42S14M 187,17 184,37 A ∙ B
44S14M 196,08 193,28 A ∙ B
48S14M 213,90 211,11 A ∙ B
50S14M 222,82 220,02 A ∙ B
56S14M 249,55 246,76 A ∙ B
60S14M 267,38 264,59 C
64S14M 285,21 282,41 C
72S14M 320,86 318,06 C
84S14M 374,33 371,54 C
96S14M 427,81 425,01 C
120S14M 534,76 531,97 C
144S14M 641,71 638,92 C

When it comes to synchronised belts, the toothed profile of the MegaTorque top-performance timing belt is a patented innovation. The gaps between the teeth on the pulley washers of the MegaTorque, high-powered belt differ from those on previously designed profiles.

Because of its special shape, the profile formed by the spaces between the teeth guarantees optimal meshing of the timing belt teeth. The depth of the space between each tooth is less than the height of the teeth making up the MegaTorque high-powered belt. And this, together with the arched curvature of the gap between each pulley washer, means that tension is spread more evenly over the entire stretch of belt teeth.

Exceptionally High Manufacturing Precision

MegaTorque top-performance timing belts are produced with the highest degree of precision. Manufacturing tolerances as regards length, width and thickness are minimal and are determined in line with commercially profitable manufacturing processes. Should, however, narrower tolerances be absolutely essential, we recommend a technical consultation with us on this issue.

Gap Profile of Tooth Lock Washers

It is imperative that the gaps between the teeth of the washers making up the SuperTorque timing belt correspond exactly to the pitch and that they are manufactured according to the recommended range of tolerance. Only by adhering to the specified dimensions can utmost strength and smooth running with virtually no signs of play be guaranteed for the SuperTorque timing belt.

Tooth Lock Washers - The Materials

The most diverse types of materials, such as sintered metal, plastics, aluminium, steel, grey cast iron and cast steel, can be used to make tooth lock washers. But the material is primarily chosen so as to best suit the intended use and the demands in question, whereby particular attention should be paid to ensuring that adequate resistance to wear is present. In the case of substantial series production requirements, manufacturing tooth lock washers using the full mould process (injection moulding or pressure die-casting) is the most appropriate method.

Flanged Wheels

Flanged wheels or pulleys prevent the wearing down of timing belts. It is necessary that at least one of the tooth lock washers - for cost reasons usually the smaller one - is fitted with 2 flanged wheels. The mounting of 1 flanged wheel on both sides of each tooth lock washer is also possible. With drives having a centre distance greater than 8 times dw, it is recommendable to attach 2 flanged wheels per tooth lock washer.

Parallelism

The teeth should run parallel to the axis of the borehole with a maximum deviation of 0.001 mm per millimetre of the width.

Conicity

The conicity can only amount to a maximum of 0.001 mm per millimetre in the head width and, at the same time, is not to exceed the permissible diameter tolerance.

Surface Quality in accordance with ISO R 468

The surface quality is not to exceed the value of Ra=3,2 µm for tooth flanks and tooth crest.

Balancing

 With tooth lock washers that are processed on both sides, balancing is usually not necessary up to a peripheral velocity of 30 m/s. But cast discs are even to be balanced at v < 30 m/s.

The following is a general rule of thumb:

  1. Balancing in one plane, quality level Q 16 in accordance with VDI 2060 at v = 30 m/s for dw>400 mm or at n = 1500 min-1 for dw 400 mm.
  2. Balancing on two planes with the recommendation Q 6.3 at v > 30 m/s or at v> 20 m/s at a ratio of effective diameter to tooth lock washer width < 4.

 Balancing is carried out on ungrooved tooth lock washers by means of a smooth balancing mandrel.

Further details can be found in ISO 254 and in the VDI Guideline 2060.

Teeth no. Effective Ø (mm) Outer Ø (mm) Teeth no. Effective Ø (mm) Outer Ø (mm) Teeth no. Effective Ø (mm) Outer Ø (mm)
18 45,84 44,46 61 155,34 153,96 104 264,83 263,46
19 48,38 47,01 62 157,88 156,51 105 267,38 266,01
20 50,39 49,56 63 160,43 159,06 106 269,93 268,55
21 53,48 52,10 64 162,97 161,60 107 272,47 271,10
22 56,02 54,65 65 165,52 164,15 108 275,02 273,65
23 58,57 57,20 66 168,07 166,70 109 277,57 276,19
24 61,12 59,74 67 170,61 169,24 110 280,11 278,74
25 63,66 62,29 68 173,16 171,79 11 282,66 281,29
26 66,21 64,84 69 175,71 174,34 112 285,21 283,83
27 68,75 67,38 70 178,25 176,88 113 287,75 286,38
28 71,30 69,93 71 180,80 179,43 114 290,30 288,93
29 73,85 72,48 72 183,35 181,97 115 292,85 291,47
30 76,39 75,02 73 185,89 184,52 116 295,39 294,02
31 78,94 77,57 74 188,44 187,07 117 297,94 296,57
32 81,49 80,12 75 190,99 189,61 118 300,48 299,11
33 84,03 82,66 76 193,53 192,16 119 303,03 301,66
34 86,58 85,21 77 196,08 194,71 120 305,58 304,21
35 89,13 87,75 78 198,63 197,25 121 308,12 306,75
36 91,67 90,30 79 201,17 199,80 122 310,67 309,30
37 94,22 92,85 80 203,72 202,35 123 313,22 311,84
38 96,77 95,39 81 206,26 204,89 124 315,76 314,39
39 99,31 97,94 82 208,81 207,44 125 318,31 316,94
40 101,86 100,49 83 211,36 209,99 126 320,86 319,48
41 104,41 103,03 84 213,90 212,53 127 323,40 322,03
42 106,95 105,58 85 216,45 215,08 128 325,95 324,58
43 109,50 108,13 86 219,00 217,63 129 328,50 327,12
44 112,05 110,67 87 221,54 220,17 130 331,04 329,67
45 114,59 113,22 88 224,09 222,72 131 333,59 332,22
46 117,14 115,77 89 226,64 225,26 132 336,14 334,76
47 119,68 118,31 90 229,18 227,81 133 338,68 337,31
48 122,23 120,86 91 231,73 230,36 134 341,23 339,86
49 124,78 123,41 92 234,28 232,90 135 343,77 342,40
50 127,32 125,95 93 236,82 235,45 136 346,32 344,95
51 129,87 128,50 94 239,37 238,00 137 348,87 347,50
52 132,42 131,04 95 241,92 240,54 138 351,41 350,04
53 134,96 133,59 86 244,46 243,09 139 353,96 352,59
54 137,51 136,14 67 247,01 245,64 140 356,51 355,14
55 140,06 138,68 98 249,56 248,18 141 359,05 357,68
56 142,60 141,23 99 252,10 250,73 142 361,60 360,23
57 145,15 143,78 100 254,65 253,28 143 364,15 362,77
58 147,70 146,32 101 257,19 255,82 144 366,69 365,32
59 150,24 148,87 102 259,74 258,37
60 152,79 151,42 103 262,29 260,92
Teeth no. Effective Ø (mm) Outer Ø (mm) Teeth no. Effective Ø (mm) Outer Ø (mm) Teeth no. Effective Ø (mm) Outer Ø (mm)
28 124,78 121,98 70 311,94 309,15 112 499,11 496,32
29 129,23 126,44 71 316,40 313,61 113 503,57 500,77
30 133,69 130,90 72 320,86 318,06 114 508,02 505,23
31 138,15 135,35 73 325,31 322,52 115 512,48 509,68
32 142,60 139,81 74 329,77 326,98 116 516,94 514,14
33 147,06 144,27 75 334,23 331,43 117 521,39 518,60
34 151,52 148,72 76 338,68 335,89 118 525,85 523,05
35 155,97 153,18 77 343,14 340,34 119 530,30 527,51
36 160,43 157,63 78 347,59 344,80 120 534,76 531,97
37 164,88 162,09 79 352,05 349,26 121 539,22 536,42
38 169,34 166,55 80 356,51 353,71 122 543,67 540,88
39 173,80 171,00 81 360,96 358,17 123 548,13 545,34
40 178,25 175,46 82 365,42 362,63 124 552,59 549,79
41 182,71 179,92 83 369,88 367,08 125 557,04 554,25
42 197,17 184,37 84 374,33 371,54 126 561,50 558,70
43 191,62 188,83 85 378,79 375,99 127 565,96 563,16
44 196,08 193,28 86 383,25 380,45 128 570,41 567,62
45 200,54 197,74 87 387,70 384,91 129 574,87 572,07
46 204,99 202,20 88 392,16 389,36 130 579,32 576,53
47 209,45 206,65 89 396,61 393,82 131 583,78 580,99
48 213,90 211,11 90 401,07 398,28 132 588,24 585,44
49 218,36 215,57 91 405,53 402,73 133 592,69 589,90
50 222,82 220,02 92 409,98 407,19 134 597,15 594,36
51 227,27 224,48 93 414,44 411,65 135 601,61 598,81
52 231,73 228,94 94 418,90 416,10 136 606,06 603,27
53 236,19 233,39 95 423,35 420,56 137 610,52 607,72
54 240,64 237,85 96 427,81 425,01 138 614,97 612,18
55 245,10 242,30 97 432,26 429,47 139 619,43 616,64
56 249,56 246,76 98 436,72 433,93 140 623,89 621,09
57 254,01 251,22 99 441,18 438,38 141 628,34 625,55
58 258,47 255,67 100 445,63 442,84 142 632,80 630,01
59 262,92 260,13 101 450,09 447,30 143 637,26 634,46
60 267,38 264,59 102 454,55 451,75 144 641,71 638,92
61 271,84 269,04 103 459,00 456,21 145 646,17 643,38
62 276,29 273,50 104 463,46 460,67 146 650,63 647,83
63 280,75 277,96 105 467,92 465,12 147 655,08 652,29
64 285,21 282,41 106 472,37 469,58 148 659,54 656,74
65 289,66 286,87 107 476,83 474,03 149 663,99 661,20
66 294,12 291,32 108 481,28 478,49 150 668,45 665,66
67 298,57 295,78 109 485,74 482,95
68 303,03 300,24 110 490,20 487,40
69 307,49 304,69 111 494,65 491,86
Tolerances of outer diameter
Outer diameter Permitted
tolerance		 Permitted
rotational
deviation		 Rough turning
Oversize (da) +
mm from mm to mm mm mm
0 50 +0,05 0,04 1
51 100 +0,08 0,05
101 150 +0,10 0,07
151 200 +0,12 0,10
201 300 +0,15 0,12
301 500 +0,18 +0,03 pro
100mm Outer diameter
501 ... +0,20
Axial run-out tolerance
Outer diameter Permitted
rotational
deviation
mm mm
bis 101,60 0.1
über 101,60
bis 250,00		 0,1 +0,1mm
pro 100mm
Outer diameter
über 251,00 0,25 +0,05mm
pro 100mm Outer diameter
Surface Rz
Pitch permitted peak-to-valley roughness Rz
8 mm Rz < 16
14 mm Rz < 25

In order to achieve optimal performance and as long a service life as possible, timing belts have to be correctly installed, correctly tightened and correctly aligned. Prior to installation, it is always recommendable to inspect the belts for any possible damage resulting from transport or storage.

The Correct Mounting

Pulleys and, of course, belts themselves always have to be mounted with the correct alignment. This means that belts cannot be bent or buckled in any way, which could lead to a drop below the minimum permissible pulley diameter. That corresponds to approximately 50 mm for belts with a pitch of 8 mm and about 125 mm for those belts with a 14 mm pitch. Imbalanced drives cause a variety of belt tension problems and edge stresses and are also responsible for extreme lateral movement, the undesired wobble. All this leads to increased operating noise and more wear and tear on the belt. Therefore the parallelism error of the pulleys should only amount to a maximum of 0.5% of the centre distance. Angle accuracy is to be maintained by keeping misalignment down to 0.25° at the very most.

The Correct Mounting

Pre-Tensioning The Belt Correctly

Firstly the belt always has to be tightened in line with the calculated pre-tensioning force and checked after a running-in period of about 5 minutes. The belt is then to be retightened according to the relevant value, should it have shifted or altered its position in any way. Finally after a further 8 hours of operating, the belt is to be once again inspected and, if necessary, tightened to comply with the required value that has already been calculated.

Causes of failure and corrective measures can be found in the following document:

Troubleshooting for power transmission products

Belt length
mm		 Minimal
adjustment
for installation		 Required
adjustment range
for tightening
8M 14M 8M, 14M
smaller than 1525 34,5 mm 59,5 mm 2,5 mm
1525 - 3050 37,0 mm 62,0 mm 5,0 mm
greater than 3050 39,5 mm 64,5 mm 7,5 mm

MegaTorque Selection Diagram

MegaTorque Selection Diagram

Always ready for action: The MEGATORQUE from Mitsuboshi

Fu permissible for belt width ⋛ 60mm
Specific basic performance in [kW] = Pn x width factor
 

Belt width b (mm) 15 20 25 30 40 50 60
Fupermissable (N) 1155 1603 2068 2545 3533 4556 5609
Width Factor BF 0.21 0.29 0.37 0.45 0.63 0.81 1.00
Teeth no. 24 26 28 30 32 34 36 38 40 42 44 46 48 50 60 72 84
dw 61.12 66.21 71.30 76.39 81.49 86.58 91.67 96.77 101.86 106.95 112.05 117.14 122.23 127.32 152.79 183.35 213.90
50 1.35 1.47 1.58 1.70 1.82 1.93 2.05 2.17 2.27 2.37 2.46 2.56 2.66 2.75 3.21 3.75 4.27
100 2.71 2.94 3.17 3.40 3.63 3.87 4.11 4.35 4.54 4.74 4.93 5.12 5.31 5.50 6.42 7.50 8.54
200 4.91 5.32 5.73 6.15 6.57 6.99 7.42 7.85 8.20 8.54 8.89 9.22 9.56 9.89 11.52 13.41 15.23
300 6.91 7.48 8.06 8.64 9.23 9.83 10.43 11.04 11.52 12.00 12.47 12.94 13.41 13.87 16.12 18.71 21.20
400 8.77 9.50 10.23 10.98 11.73 12.48 13.25 14.02 14.63 15.23 15.82 16.41 16.99 17.57 20.38 23.62 26.72
500 10.53 11.40 12.29 13.18 14.08 14.99 15.92 16.85 17.57 18.28 18.99 19.69 20.38 21.07 24.40 28.22 31.88
600 12.20 13.22 14.24 15.28 16.33 17.39 18.46 19.55 20.38 21.20 22.02 22.82 23.62 24.40 28.22 32.59 36.76
700 13.80 14.95 16.11 17.29 18.48 19.69 20.91 22.15 23.09 24.01 24.92 25.82 26.72 27.60 31.88 36.76 41.39
800 15.32 16.61 17.91 19.23 20.56 21.91 23.28 24.66 25.70 26.72 27.72 28.72 29.70 30.68 35.39 40.74 45.81
900 16.79 18.21 19.64 21.09 22.56 24.05 25.56 27.10 28.22 29.34 30.44 31.52 32.59 33.65 38.77 44.57 50.04
1000 18.21 19.75 21.31 22.89 24.50 26.13 27.78 29.46 30.68 31.88 33.06 34.23 35.39 36.53 42.03 48.25 54.09
1100 19.57 21.24 22.92 24.56 26.38 28.14 29.94 31.76 33.06 34.35 35.62 36.87 38.10 39.32 45.19 51.80 57.98
1200 20.89 22.67 24.48 26.33 28.20 30.10 32.04 34.00 35.39 36.76 38.10 39.43 40.74 42.03 48.25 55.22 61.71
1300 22.16 24.06 26.00 27.97 29.97 32.01 34.08 36.19 37.66 39.10 40.52 41.93 43.31 44.67 51.21 58.52 65.29
1400 23.38 25.40 27.46 29.56 31.69 33.86 36.07 38.33 39.87 41.39 42.89 44.36 45.81 47.24 54.09 61.71 68.73
1500 24.57 26.71 28.88 31.10 33.37 35.67 38.02 40.41 42.03 43.62 45.19 46.73 48.25 49.74 56.88 64.79 72.03
1600 25.71 27.97 30.26 32.61 35.00 37.44 39.92 42.46 44.15 45.81 47.44 49.05 50.63 52.18 59.59 67.76 75.19
1700 26.82 29.19 31.60 34.07 36.59 39.16 41.78 44.46 46.22 47.95 49.64 51.31 52.95 54.56 62.23 70.63 78.22
1800 27.89 30.37 32.90 35.49 38.14 40.84 43.60 46.42 48.25 50.04 51.79 53.52 55.22 56.88 64.78 73.40 81.12
1900 28.92 31.51 34.16 36.87 39.65 42.48 45.38 48.35 50.23 52.08 53.90 55.68 57.43 59.15 67.27 76.07 83.89
2000 29.92 32.62 35.39 38.22 41.12 44.09 47.13 50.23 52.18 54.09 55.96 57.79 59.59 61.36 69.68 78.64 86.53
2100 30.89 33.70 36.57 39.53 42.55 45.65 48.83 52.08 54.09 56.05 57.97 59.86 61.71 63.51 72.03 81.12 89.05
2200 31.82 34.74 37.73 40.80 43.95 47.19 50.50 53.90 55.96 57.97 59.95 61.88 63.77 65.62 74.30 83.50 91.43
2300 32.72 35.74 38.85 42.04 45.32 48.68 52.14 55.68 57.79 59.86 61.88 63.85 65.79 67.68 76.51 85.79
2400 33.59 36.72 39.93 43.25 46.65 50.15 53.74 57.43 59.59 61.71 63.77 65.79 67.76 69.68 78.64 87.98
2500 34.42 37.66 40.99 44.42 47.19 51.58 55.31 59.15 61.36 63.51 65.62 67.68 69.68 71.64 80.72 90.08
2600 35.23 38.57 42.01 45.56 48.68 52.98 56.85 60.83 63.09 65.29 67.43 69.52 71.56 73.55 82.72 92.09
2700 36.00 39.44 43.00 46.67 50.15 54.34 58.36 62.48 64.78 67.02 69.21 71.33 73.40 75.41 84.66
2800 36.75 40.29 43.96 47.74 51.65 55.68 59.83 64.11 66.45 68.73 70.94 73.09 75.19 77.23 86.53
2900 37.46 41.11 44.89 48.79 52.82 56.99 61.28 65.70 68.08 70.39 72.64 74.82 76.94 78.99 88.34
3000 38.15 41.90 45.78 49.80 53.96 58.26 62.70 67.27 69.68 72.03 74.30 76.50 78.64 80.71 90.08
3200 39.44 43.39 47.49 51.75 56.16 60.72 65.44 70.31 72.79 75.19 77.51 79.76 81.93 84.02
3400 40.61 44.76 49.08 53.57 58.23 63.07 68.07 73.25 75.78 78.22 80.58 82.85 85.04 87.14
3600 41.67 46.02 50.55 55.28 60.19 65.30 70.59 76.07 78.64 81.12 83.50 85.79 87.98 90.08
3800 42.63 47.17 51.92 56.88 62.04 67.42 73.00 78.78 81.39 83.89 86.29 88.58 90.76
4000 43.47 48.21 53.17 58.36 63.78 69.42 75.30 81.39 84.02 86.53 88.93 91.21
4200 44.21 49.14 54.31 59.73 65.41 71.32 77.49 83.89 86.53 89.04 91.43
4400 44.85 49.96 55.35 61.00 66.92 73.11 79.57 86.29 88.93 91.43
4600 45.38 50.68 56.27 62.16 68.33 74.80 81.55 88.57 91.21
4800 45.81 51.29 57.09 63.21 69.64 76.37 83.42 90.76
5000 46.14 51.80 57.81 64.15 70.83 77.84 85.18
5200 46.36 52.20 58.41 64.99 71.92 79.20 86.84
5400 46.48 52.51 58.92 65.72 72.90 80.46
5600 46.51 52.70 59.32 68.34 73.78
5800 46.43 52.80 59.61 66.86 74.54
6000 46.25 52.79 59.80 67.28
y axis = revolution of the small tooth lock washer or pulley washer in min -1
Belt width b (mm) 30 40 50 60 80 100 120
Fupermissable (N) 3436 4770 6152 7573 10513 13558 16690
Width Factor BF 0.21 0.29 0.37 0.45 0.63 0.81 1.00
Teeth no. 28 30 32 34 36 40 42 44 48 50 56 60 64 72 84    
dw 124,8 133,7 142,6 151,5 160,4 178,3 187,1 196,1 214,0 222,8 249,6 267,4 285,2 320,9 374,3    
20 3.07 3.34 3.61 3.80 4.00 4.38 4.57 4.75 5.12 5.31 5.85 6.21 6.56 7.26 8.27    
40 6.15 6.67 7.22 7.61 7.99 8.76 9.13 9.51 10.25 10.62 11.70 12.42 13.12 14.51 16.55    
60 9.22 10.01 10.82 11.41 11.99 13.13 13.70 14.26 15.37 15.92 17.55 18.62 19.68 21.77 24.82    
80 12.29 13.35 14.43 15.21 15.98 17.51 18.27 19.02 20.50 21.23 23.41 24.83 26.25 29.03 33.10    
90 13.83 15.02 16.23 17.11 17.98 19.70 20.55 21.39 23.06 23.89 26.33 27.94 29.53 32.65 37.24    
100 15.36 16.68 18.04 19.01 19.98 21.89 22.83 23.77 25.62 26.54 29.26 31.04 32.81 36.28 41.37    
200 27.88 30.31 32.81 34.55 36.28 39.69 41.37 43.04 46.34 47.97 52.79 55.95 59.07 65.20 74.16    
300 39.25 42.74 46.34 48.78 51.19 55.95 58.29 60.62 65.20 67.47 74.16 78.54 82.86 91.35 103.71    
400 49.84 54.38 59.07 62.15 65.20 71.20 74.16 77.09 82.86 85.71 94.13 99.63 105.06 115.69 131.15    
500 59.83 65.42 71.20 74.89 78.54 85.71 89.24 92.74 99.63 103.03 113.05 119.60 126.05 138.68 157.02    
600 69.31 75.96 82.86 87.13 91.34 99.63 103.70 107.74 115.68 119.60 131.15 138.68 146.10 160.61 181.65    
700 78.36 86.09 94.13 98.95 103.70 113.05 117.65 122.19 131.15 135.56 148.55 157.02 165.36 181.65 205.24    
800 87.02 95.84 105.05 110.40 115.68 126.05 131.14 136.18 146.10 150.98 165.36 174.73 183.94 201.93 227.94    
900 95.32 105.27 115.68 121.54 127.33 138.68 144.25 149.77 160.61 165.95 181.65 191.88 201.93 221.54 249.87    
1000 103.30 114.41 126.05 132.41 138.68 150.98 157.02 162.99 174.73 180.50 197.48 208.53 219.39 240.54 271.11    
1100 110.98 123.27 136.18 143.02 149.76 162.99 169.47 175.88 188.49 194.68 212.90 224.75 236.38 259.05 291.72    
1200 118.37 131.87 146.10 153.40 160.61 174.72 181.65 188.49 201.93 208.53 227.94 240.56 252.94 277.06 311.78    
1300 125.49 140.24 155.82 163.58 171.23 186.21 193.56 200.82 215.07 222.07 242.64 256.00 269.11 294.62    
1400 132.26 148.39 165.35 173.56 181.65 197.48 205.24 212.90 227.94 235.33 257.02 271.11 284.91 311.77    
1500 138.98 156.32 174.72 183.36 191.87 208.53 216.69 224.75 240.56 248.32 271.10 285.89 300.38    
1600 145.36 164.06 183.93 193.00 201.92 219.39 227.94 236.38 252.94 261.07 284.91 300.38 315.53    
1700 151.51 171.60 193.00 202.48 211.81 230.06 238.99 247.81 265.10 273.59 298.46 314.59    
1800 157.44 178.96 201.92 211.81 221.53 240.56 249.87 259.05 277.05 285.89 311.77    
1900 163.16 186.14 210.72 221.00 231.12 250.89 260.56 270.10 288.81 297.98 324.85    
2000 168.67 193.16 219.38 230.06 240.56 261.07 271.10 280.99 300.38 309.88    
2100 173.97 200.01 227.94 238.99 249.86 271.10 281.48 291.72 311.77 321.60    
2200 179.08 206.69 236.37 247.80 259.04 280.99 291.72 302.29 322.99    
2300 183.99 213.23 244.71 256.51 268.10 290.75 301.81 312.71    
2400 188.71 219.61 252.94 265.10 277.05 300.38 311.77 322.99    
2500 193.24 225.85 261.07 273.58 285.88 309.88 321.60    
2600 197.59 231.95 269.10 281.97 294.61 319.27    
2700 201.76 237.90 277.05 290.26 303.24    
2800 205.75 243.72 284.91 298.46 311.76    
2900 209.57 249.41 292.68 306.56 320.20    
3000 213.21 254.96 300.37 314.58    
3100 216.68 260.39 307.98 322.52    
3200 219.99 265.69 315.52    
3300 223.12 270.87 322.99    
3400 226.09 275.92    
3500 228.90 280.86    
                                   
y axis = revolution of the small tooth lock washer or pulley washer in min -1

Running Round The Clock: load factors of the MEGATORQUE timing belt

Timing belts transmit tensile strength without slipping with the result that the greatest longitudinal force or pull determines the width of the belt. With drives where operating conditions are characterised by jerky movements and impact, it is recommended to take a load factor of c2 = 2.0.

Service factor c0 = c2 + c3
Load factor c2 Examples of drive units
Electric motors with low starting torque (up to 1.5 x nominal torque) e.g. DC shunt motors, combustion engines with 8 or more cylinders, water and steam turbines Three-phase and AC motors with normal starting torque (1.5-2.5 x nominal torque) e.g. DC shunt motors with compound winding, squirrel cage motors, combustion engines with 4-6 cylinders Three-phase and AC motors with high starting and brake torque (exceeding 2.5 x nominal torque) e.g. single phase and synchronous motors with high torque, combustion engines up to 4 cylinders
Example of
working machines		 Load factor c2 for daily operating time (hours)
up to
10		 10
up to
16		 over
16		 up to 10 10
up to
16		 over
16		 up to
10		 10
up to
16		 over
16
Belt conveyors, measuring instruments,
medical equipment		 1.1 1.3 1.5 1.2 1.4 1.6 1.3 1.5 1.7
Tooling machinery,
(lightweight turning machines),
woodworking machines (circular saws, belt saws, planing machines), textile machines (bobbin winding machines, wrapping machines), paper industry machinery (calanders, dryers, drum strainers), dough mixers, laundry machines		 1.2 1.4 1.6 1.4 1.6 1.8 1.6 1.8 2.0
Fans up to 10 kW,
textile machinery (spinning, weaving and twisting), tooling machines, (rolling machines, grinding machines and planing machines, lightweight milling machines), stirrers and mixers for semi-liquid products		 1.3 1.5 1.7 1.5 1.7 1.9 1.7 1.9 2.1
Fans (radial blowers), compressors (radial compressors), paper machines, rotary pumps, gear pumps and centrifugal pumps, Jordan pumps, belt conveyor systems for ores and coal, pit fans, heavy textile machinery, elevators, generators, excoter machines 1.4 1.6 1.8 1.6 1.8 2.0 1.8 2.0 2.2
Piston machines, pumps, compressors, rolling crushers, shredders, kneading machines, fans, paper mills, defibrators 1.6 1.8 2.0 1.8 2.0 2.2 2.0 2.2 2.4
Acceleration factor c3  
Transmission ratio Acceleration factor  
i c3  
1 up to 1,24 0.00  
1,25 up to 1,74 0.10  
1,75 up to 2,49 0.20  
2,50 up to 3,49 0.30  
over 3,5 0.40  
Correction factor 3M                
Belt length
(mm)		 bis 189 189-261 261-402 402-600 >600                
Correction factor 0.79 0.87 1.00 1.08 1.18                
                           
Correction factor 5M                
Belt length
(mm)		 bis 189 189-261 261-402 402-600 >600                
Correction factor 0.79 0.87 1.00 1.08 1.18                
                           
Correction factor 8M  
Belt length
(mm)		 640 720 800 896 1000 1120 1200 1280 1440 1600 1792 2000  
Correction factor 0.79 0.83 0.87 0.91 0.96 1.00 1.03 1.05 1.10 1.14 1.18 1.22  
                           
Belt length
(mm)		 2240 2400 2520 2600 2800 2840 3048 3200 3600 4000 4400 4480  
Correction factor 1.26 1.29 1.31 1.32 1.35 1.36 1.38 1.40 1.45 1.49 1.52 1.53  
                           
Correction factor 14M
Belt length
(mm)		 994 1120 1190 1260 1400 1568 1610 1750 1960 2100 2240 2310 2380
Correction factor 0.68 0.73 0.75 0.77 0.81 0.85 0.86 0.89 0.94 0.96 0.99 1.00 1.01
                           
Belt length
(mm)		 2450 2520 2590 2660 2800 3136 3304 3360 3500 3850 3920 1326 4410
Correction factor 1.02 1.03 1.04 1.05 1.07 1.12 1.14 1.14 1.16 1.19 1.20 1.24 1.25