Synchro-Star-Belts

This standard timing belt was developed so as to round off the product range for our clients. It is viewed as a particularly favourably priced solution, which does the job of transmitting power using a timing belt.

Advantages

  1. This belt designed for toothed power transmission solves the problems linked with chains and cogwheels. Especially those types displaying the extra short distance lend themselves for use with precision instruments and IT systems.
  2. Thin, lightweight and fantastically flexible - this belt is ideal for compactly-designed applications
  3. Highly efficient, top-speed transmission
  4. Less operating noise when compared with chains/cogwheels
  5. Maintenance-free
  6. Standard belts can be used with temperatures ranging between -30°C and +80°C and they also provide a great deal of muscle with their conductive properties
Material Chloroprene
Standard tensile member Carbon
Timing belt profile MXL, XL, L, H, XH, XXH
Tooth lock washer profile Standard
Double toothed yes
Coating Nylon
Temperature range -30° - +80° Celsius
Oil resistance normal
Wear resistant good
electrical conductivity ISO 9563

 

Model t ht hS
MXL 2.032 0.510 1.110
DMXL 2.032 0.510 1.530
XL 5.080 1.270 2.270
DXL 5.080 1.270 3.050
L 9.525 1.910 3.610
DL 9.525 1.910 4.580
H 12.700 2.290 4.590
DH 12.700 2.290 5.950
XH 22.225 6.350 11.200
XXH 31.750 9.530 15.700

Synchro-Star Order Reference

Belt type MXL
Tooth distance 2,032 (mm)
Width code 013 / 019 / 025 / 037 / 050
Width in mm 3,2 / 4,8 / 6,4 / 9,5 / 12,7
Size 34 MXL 126 MXL 365 (D)MXL
35 MXL 127 MXL 372 (D)MXL
40 MXL 128 MXL 380 (D)MXL
41 MXL 129 MXL 397 (D)MXL
45 MXL 130 MXL 400 (D)MXL
48 MXL 131 MXL 405 (D)MXL
50 MXL 132 MXL 419 (D)MXL
52 MXL 135 MXL 424 (D)MXL
53 MXL 138 MXL 435 (D)MXL
54 MXL 140 MXL 436 (D)MXL
55 MXL 144 MXL 448 (D)MXL
56 MXL 147 (D)MXL 453 (D)MXL
59 MXL 150 (D)MXL 464 (D)MXL
60 MXL 155 (D)MXL 478 (D)MXL
63 MXL 158 (D)MXL 498 (D)MXL
65 MXL 160 (D)MXL 503 (D)MXL
67 MXL 165 (D)MXL 515 (D)MXL
68 MXL 170 (D)MXL 520 (D)MXL
70 MXL 175 (D)MXL 537 (D)MXL
71 MXL 180 (D)MXL 550 (D)MXL
72 MXL 184 (D)MXL 569 (D)MXL
73 MXL 185 (D)MXL 591 (D)MXL
75 MXL 187 (D)MXL 650 (D)MXL
76 MXL 190 (D)MXL 705 (D)MXL
78 MXL 195 (D)MXL 772 (D)MXL
79 MXL 200 (D)MXL 1369 MXL
80 MXL 203 (D)MXL
81 MXL 205 (D)MXL
82 MXL 210 (D)MXL
83 MXL 212 (D)MXL
85 MXL 219 (D)MXL
87 MXL 220 (D)MXL
88 MXL 224 (D)MXL
89 MXL 227 (D)MXL
90 MXL 228 (D)MXL
91 MXL 232 (D)MXL
92 MXL 236 (D)MXL
93 MXL 239 (D)MXL
94 MXL 240 (D)MXL
95 MXL 250 (D)MXL
97 MXL 256 (D)MXL
98 MXL 260 (D)MXL
100 MXL 265 (D)MXL
102 MXL 280 (D)MXL
103 MXL 281 (D)MXL
105 MXL 290 (D)MXL
106 MXL 295 (D)MXL
110 MXL 300 (D)MXL
112 MXL 310 (D)MXL
114 MXL 312 (D)MXL
115 MXL 315 (D)MXL
118 MXL 324 (D)MXL
120 MXL 332 (D)MXL
121 MXL 336 (D)MXL
122 MXL 338 (D)MXL
123 MXL 339 (D)MXL
125 MXL 350 (D)MXL
Calculation formula Teeth no. = Length code
Calculation of the belt pitch length in mm
Teeth no. x tooth distance (2,032 mm)
Example: 34MXL: 34x2,032 = 69,09 mm
Belt type XL
Tooth distance 5,08 (mm)
Width code 025 / 031 / 037 / 050
Width in mm 6,4 / 7,9 / 9,5 / 12,7
Size 60 XL 180 (D)XL 490 (D)XL
64 XL 182 (D)XL 522 XL
68 XL 184 (D)XL 532 XL
70 XL 186 (D)XL 564 XL
76 XL 188 (D)XL 592 XL
78 XL 190 (D)XL 600 XL
80 XL 192 (D)XL 616 XL
81 XL 194 (D)XL 630 XL
84 XL 196 (D)XL 670 XL
86 XL 198 (D)XL 754 XL
88 XL 200 (D)XL 828 XL
90 XL 202 (D)XL 860 XL
92 XL 204 (D)XL
94 XL 206 (D)XL
96 XL 210 (D)XL
98 XL 212 (D)XL
100 XL 216 (D)XL
102 XL 218 (D)XL
104 XL 220 (D)XL
108 XL 228 (D)XL
110 XL 230 (D)XL
112 XL 234 (D)XL
114 XL 236 (D)XL
116 XL 240 (D)XL
118 XL 250 (D)XL
120 XL 254 (D)XL
122 XL 260 (D)XL
124 XL 270 (D)XL
126 XL 276 (D)XL
128 XL 280 (D)XL
130 XL 282 (D)XL
134 XL 290 (D)XL
136 XL 300 (D)XL
138 XL 310 (D)XL
140 XL 314 XL
142 XL 320 (D)XL
144 XL 330 (D)XL
146 XL 332 (D)XL
148 XL 340 (D)XL
150 (D)XL 348 (D)XL
152 (D)XL 352 (D)XL
154 (D)XL 360 (D)XL
156 (D)XL 370 (D)XL
158 (D)XL 376 (D)XL
160 (D)XL 384 (D)XL
162 (D)XL 388 (D)XL
164 (D)XL 390 (D)XL
166 (D)XL 396 (D)XL
170 (D)XL 414 (D)XL
172 (D)XL 424 (D)XL
174 (D)XL 460 (D)XL
176 (D)XL 478 (D)XL
178 (D)XL 480 (D)XL
Calculation formula Teeth no. = Length code/2
Calculation of the belt pitch length in mm
(Zahl der Zähne/2) x tooth distance (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 / 150
Width in mm 12,7 / 19,1 / 25,4 / 38,1
Size 109 L 124 L 135 L
150 L 165 L 173 L
187 (D)L 210 L 217 L
225 (D)L 232 (D)L 240 L
255 (D)L 265 (D)L 270 (D)L
277 (D)L 285 (D)L 300 (D)L
320 (D)L 322 (D)L 334 (D)L
337 (D)L 345 (D)L 360 (D)L
367 (D)L 375 (D)L 382 (D)L
390 (D)L 394 (D)L 398 (D)L
420 (D)L 427 (D)L 435 (D)L
450 (D)L 454 (D)L 480 (D)L
510 (D)L 525 (D)L 540 (D)L
548 (D)L 581 (D)L 600 (D)L
630 (D)L 653 (D)L 660 L
697 L 731 L 934 L
Calculation formula Teeth no. = Length code/3,75 (round on full teeth)
Calculation of the belt pitch length in mm
(Zahl der Zähne/3,75 rounded) x tooth distance (9,525 mm)
Example: 109L: (109/3,75) = 29 Tooth
29x9,525= 276,23 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 225 H 570 (D)H  
230 H 600 (D)H  
240 (D)H 625 (D)H  
245 (D)H 630 (D)H  
255 (D)H 650 (D)H  
270 (D)H 660 (D)H  
280 (D)H 680 (D)H  
300 (D)H 700 (D)H  
310 (D)H 750 (D)H  
315 (D)H 770 (D)H  
320 (D)H 800 (D)H  
330 (D)H 810 (D)H  
350 (D)H 840 (D)H  
360 (D)H 850 (D)H  
370 (D)H 860 (D)H  
375 (D)H 880 (D)H  
390 (D)H 900 (D)H  
400 (D)H 950 (D)H  
410 (D)H 1000 (D)H  
420 (D)H 1100 (D)H  
430 (D)H 1120 (D)H  
450 (D)H 1130 (D)H  
465 (D)H 1245 (D)H  
480 (D)H 1250 (D)H  
490 H 1360 H  
510 (D)H 1400 (D)H  
530 (D)H 1700 (D)H  
540 (D)H 1765 (D)H  
560 (D)H  
Calculation formula Teeth no. = Length code/5  
Calculation of the belt pitch length in mm  
Zahl der Zähne/5 x tooth distance (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 / 600
Width in mm 50,8 / 76,2 / 101,6 /127 / 152,4
Size 463 XH
507 XH
560 XH
630 XH
700 XH
735 XH
770 XH
840 XH
927 XH
980 XH
1120 XH
1260 XH
1400 XH
1540 XH
1750 XH
Calculation formula Teeth no. = Length code/8,74
 (round on full teeth)
Calculation of the belt pitch length in mm
(Zahl der Zähne/8,74 rounded) x tooth distance (22,225 mm)
Example: 463XH: (463/8,74) = 53 Zähne
53x22,225= 1.177,93 mm
Belt type XXH
Tooth distance 31,75 mm
Width code 200 / 300 / 400 /500 / 600
Width in mm 50,8 / 76,2 / 101,6 /127 / 152,4
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 tooth distance (31,75 mm)
Example: 700XXH: (700/12,5)x31,75 = 1.778 mm

An impressively extensive range of tooth lock washers for the pitches of MXL, XL, L and H is also available. These can be delivered pre-drilled or in the taper lock version.

Contact us and tell us exactly what you need.

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 and XH 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:

Troubleshooting for power transmission products

Belt length
mm
Minimal
adjustment
for installation
Required
adjustment range
for tightening
MXL XL L H XH MXL,XL,L,H,XH
smaller than 1525 15,5 mm 20,5 mm 34,5 mm 59,5 mm 79,5 mm 2,5 mm
1525-3050 18 mm 23 mm 37 mm 62 mm 82 mm 5 mm
greater than 3050 20,5 mm 25,5 mm 39,5 mm 64,5 mm 84,5 mm 7,5 mm
             
Adjustment range for XXH can be requested if needed