Synchrobelt MXL-XXH
This standard timing belt has been developed so as to perfect the product range for our customers. It is considered to be a particularly cost-effective way of transmitting force when using a timing belt.
Advantages
The belt is on offer in a variety of tooth shapes (MXL-XXH / HTD / STD) and lends itself for use in the lower and medium power range.
1. Partially oil resistant
2. These belts can be operated within a temperature range of -20°C up to +100°C
3. They are suitable for tropical conditions, are ageing resistant and also ozone resistant
4. Such belts can be used with inner and outer idler pulleys
5. Maintenance-free
MXL | XL | L | H | DH | XH | XXH | |
Tooth pitch t (mm) | 2.032 | 5.080 | 9.525 | 12.700 | 12.700 | 22.225 | 31.750 |
Belt thickness hs(mm) | 1.140 | 2.300 | 3.600 | 4.300 | 6.000 | 11.200 | 15.800 |
Tooth height ht (mm) | 0.510 | 1.270 | 1.910 | 2.290 | 2.290 | 6.350 | 9.600 |
Belt type | MXL | ||
Tooth distance | 2,032 (mm) | ||
Width code | 012 / 019 / 025 | ||
Width in mm | 3,05 / 4,83 / 6,35 | ||
Size | 43,2 MXL | 77,6 MXL | 132,8 MXL |
44 MXL | 80 MXL | 136 MXL | |
44,8 MXL | 80,8 MXL | 140 MXL | |
46,4 MXL | 82,4 MXL | 144 MXL | |
48 MXL | 84 MXL | 147,2 MXL | |
48,8 MXL | 84,8 MXL | 180 MXL | |
50,4 MXL | 88 MXL | 188,8 MXL | |
54,4 MXL | 89,6 MXL | 200,8 MXL | |
56 MXL | 90,4 MXL | 238,4 MXL | |
56,8 MXL | 91,2 MXL | 277,6 MXL | |
57,6 MXL | 94,4 MXL | 292 MXL | |
60 MXL | 96 MXL | 296,8 MXL | |
61,6 MXL | 97,6 MXL | 297,6 MXL | |
64 MXL | 98,4 MXL | 320 MXL | |
65,6 MXL | 100 MXL | 329,6 MXL | |
67,2 MXL | 100,8 MXL | 347,2 MXL | |
68 MXL | 105,6 MXL | 362,4 MXL | |
69,6 MXL | 112 MXL | 370,4 MXL | |
70,4 MXL | 120 MXL | 398,4 MXL | |
72 MXL | 124 MXL | 404 MXL | |
75,2 MXL | 131,2 MXL | ||
76 MXL | 132 MXL | ||
Calculation formula | Teeth no. = Length code | ||
Calculation of the belt pitch length in mm | |||
Teeth no. x tooth distance (2,032 mm) | |||
Example: 44MXL: 44x2,032 = 89,40 mm |
Belt type | XL | ||
Tooth distance | 5,08 (mm) | ||
Width code | 025 / 031 / 037 | ||
Width in mm | 6,4 / 7,9 / 9,5 | ||
Size | 60 XL | 150 XL | 272 XL |
70 XL | 156 XL | 274 XL | |
76 XL | 160 XL | 280 XL | |
80 XL | 162 XL | 286 XL | |
86 XL | 166 XL | 290 XL | |
90 XL | 168 XL | 296 XL | |
92 XL | 170 XL | 300 XL | |
94 XL | 174 XL | 306 XL | |
96 XL | 176 XL | 316 XL | |
100 XL | 178 XL | 322 XL | |
102 XL | 180 XL | 330 XL | |
106 XL | 182 XL | 340 XL | |
108 XL | 184 XL | 344 XL | |
110 XL | 188 XL | 350 XL | |
112 XL | 190 XL | 380 XL | |
114 XL | 196 XL | 382 XL | |
116 XL | 198 XL | 388 XL | |
118 XL | 200 XL | 392 XL | |
120 XL | 210 XL | 412 XL | |
124 XL | 220 XL | 414 XL | |
126 XL | 230 XL | 438 XL | |
128 XL | 232 XL | 460 XL | |
130 XL | 240 XL | 498 XL | |
134 XL | 244 XL | 506 XL | |
136 XL | 248 XL | 514 XL | |
138 XL | 250 XL | 580 XL | |
140 XL | 260 XL | 630 XL | |
148 XL | 270 XL | ||
Calculation formula | Teeth no. = Length code/2 | ||
Calculation of the belt pitch length in mm | |||
(Zahl der Zähne/2) x Zahnabstand (5,08 mm) | |||
Example: 60XL: (60/2)x5,08 = 152,40 mm |
Belt type | L | ||
Tooth distance | 9,525 (mm) | ||
Width code | 050 / 075 / 100 | ||
Width in mm | 12,7 / 19,1 / 25,4 | ||
Size | 124 L | 255 L | 420 L |
150 L | 270 L | 450 L | |
187 L | 285 L | 454 L | |
210 L | 300 L | 480 L | |
225 L | 322 L | 510 L | |
236 L | 345 L | 540 L | |
240 L | 367 L | 600 L | |
244 L | 390 L | ||
Calculation formula | Teeth no. = Length code/3,75 (auf volle Zähne runden) | ||
Calculation of the belt pitch length in mm | |||
(Zahl der Zähne/3,75 gerundet) x Zahnabstand (9,525 mm) | |||
Example: 124L: (124/3,75) = 33 Zähne 33x9,525= 314,95 mm |
Belt type | H | |||
Tooth distance | 12,7 (mm) | |||
Width code | 075 / 100 / 150 / 200 /300 | |||
Width in mm | 19,1 / 25,4 / 38,1 /50,8 /76,2 | |||
Size | 240 H | 450 (D)H | 750 (D)H | |
255 H | 480 (D)H | 800 H | ||
270 (D)H | 510 (D)H | 850 H | ||
300 (D)H | 540 (D)H | 900 H | ||
330 (D)H | 570 (D)H | 1000 H | ||
335 (D)H | 600 (D)H | 1100 H | ||
360 (D)H | 630 (D)H | 1140 H | ||
370 (D)H | 660 (D)H | 1250 H | ||
390 (D)H | 700 (D)H | 1400 H | ||
420 (D)H | 730 (D)H | 1700 H | ||
Calculation formula | Teeth no. = Length code/5 | |||
Calculation of the belt pitch length in mm | ||||
Zahl der Zähne/5 x Zahnabstand (12,7 mm) | ||||
Example: 225H: (225/5)x12,7 = 571,5 mm |
Belt type | XH |
Tooth distance | 22,225 mm |
Width code | 200 / 300 / 400 /500 |
Width in mm | 50,8 / 76,2 / 101,6 /127 |
Size | 507 XH |
534 XH | |
560 XH | |
630 XH | |
700 XH | |
770 XH | |
840 XH | |
980 XH | |
1120 XH | |
1260 XH | |
1400 XH | |
1540 XH | |
1750 XH | |
Calculation formula | Teeth no. = Length code/8,74 (auf volle Zähne runden) |
Calculation of the belt pitch length in mm | |
(Zahl der Zähne/8,74 gerundet) x Zahnabstand (22,225 mm) | |
Example: 507XH: (507/8,74) = 58 Zähne 58x22,225= 1.289,25 mm |
Belt type | XXH |
Tooth distance | 31,75 mm |
Width code | 200 / 300 / 400 /500 |
Width in mm | 50,8 / 76,2 / 101,6 /127 |
Size | 700 XXH |
800 XXH | |
900 XXH | |
1000 XXH | |
1200 XXH | |
1400 XXH | |
1600 XXH | |
1800 XXH | |
Calculation formula | Teeth no. = Length code/12,5 |
Calculation of the belt pitch length in mm | |
(Zahl der Zähne/12,5) x Zahnabstand (31,75 mm) | |
Example: 700XXH: (700/12,5)x31,75 = 1.778 mm |
Alongside our wide standard range of this product, we also craft in our ateliers high-precision drawing parts and customised special pulley washers for MXL, XL, L, H, XH and XXH pitches. With all our products we offer a comprehensive service ranging from the manufacturing of mechanical processing parts and gearing components right up to the mounting of finished systems and assembly units.
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.
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:
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 |