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Raw Edge Variable Speed Belts |
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Variable speed V-belts, also termed V / S - belts, are temperature and oil resistant as well as anti-static. A special rubber compound with textile fibres oriented across the length of the belt provides high stability and minimizes deflection in the cross section. The moulded cog ensures maximum flexibility and optimum fit in the pulley grooves. The cord, the power transmitting element, has been designed for heavy power transmission while at the same time ensuring a very high degree of length stability. Special belts are produced to order, e.g. with Aramid cord
 Construction
1. Rubber impregnated cross woven cotton polyester fabric.
2. Cushion rubber
3. Low Stretch high modulous adhesive activated polyester cable cord.
4. Compression rubber
5. Crack barrier.
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According to ISO 1604, Din 7719/1, RMA/MPTA IP - 25 or customer specifications; available within
the following dimensional ranges: |
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| Top Width |
Height |
Angle q |
Outside Length |
| 13 to 100 |
5 to 32 |
20 to 42 |
500 to 4200 |
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Alaska vari-speed belts are supplied according to following standards:
ISO 1604, DIN 7719/1 Section dimension in mm |
| Designation |
W16 |
W20 |
W25 |
W31.5 |
W40 |
W50 |
W63 |
W71 |
W80 |
W100 |
| Top Width, a mm |
17 |
21 |
26 |
33 |
42 |
52 |
65 |
74 |
83 |
104 |
| Pitch Width Wp,mm |
16 |
20 |
25 |
31.5 |
40 |
50 |
63 |
71 |
80 |
100 |
| Height, b, mm |
6 |
7 |
8 |
10 |
13 |
16 |
20 |
23 |
26 |
32 |
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*In DIN 7719 only ISO 1604 & DIN 7719/1 uses datum belt length Ld[mm] which corresponds to pitch belt length Lp[mm] |
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RMA / MPTA IP-25, section dimensions in inches. |
| Designation |
1422V |
1430V |
1922V |
1926V |
2230V |
2322V |
2426V |
2530V |
2830V |
| Top Width, a mm |
22 |
22 |
30 |
30 |
35.2 |
37 |
38 |
40 |
45 |
| Height b,mm |
8 |
9 |
10 |
11 |
11 |
11 |
12 |
15 |
13 |
| Angle,Q (o) |
22 |
30 |
22 |
26 |
30 |
22 |
26 |
30 |
30 |
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| Designation |
2926V |
3226V |
3230V |
3432V |
4036V |
4430V |
4436V |
4836V |
| Top Width, a mm |
46 |
51 |
51 |
54 |
64 |
70 |
70 |
76 |
| Height b,mm |
13 |
13 |
16 |
18 |
18 |
18 |
18 |
19 |
| Angle,Q (o) |
26 |
26 |
30 |
32 |
36 |
30 |
36 |
36 |
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Size Marking on Belts |
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| Designation |
22V A22 |
30V A22 |
37V A22 |
30V A26 |
46V A26 |
51V A26 |
40V A30 |
51V A30 |
70V A30 |
64V A36 |
70V A36 |
76V A36 |
| Top Width, a, mm |
22 |
30 |
37 |
30 |
46 |
51 |
40 |
51 |
70 |
64 |
70 |
76 |
| Pitch Width Wp,mm |
8 |
10 |
11 |
11 |
13 |
13 |
15 |
16 |
18 |
18 |
18 |
19 |
| Hight, b, mm |
22 |
22 |
22 |
26 |
26 |
26 |
30 |
30 |
30 |
36 |
36 |
36 |
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| Inch Units |
Metric Units (mm) |
| Size Designation |
Top Width TW |
Height HT |
Size Designation |
Top Width TW |
Height HT |
| HI |
1.00 |
0.50 |
25FV |
25 |
13 |
| HJ |
1.25 |
0.59 |
32FV |
32 |
15 |
| HK |
1.50 |
0.69 |
38FV |
38 |
18 |
| HL |
1.75 |
0.78 |
44FV |
44 |
20 |
| HM |
2.00 |
0.88 |
51FV |
51 |
22 |
| HN |
2.25 |
0.94 |
57FV |
57 |
24 |
| HO |
2.50 |
1.00 |
63FV |
63 |
26 |
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Belts sizes are designated by belt cross-section and effective (approximate outside) length in inches and tenths of an inch, or millimeters Example : HL0915 is HL section 91.5 inches long. 44FV2325 is 44FV section 2325 mm long. |
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