Rough Blue Round Belting and Belts
Dura-Belt rough blue (also called matte blue)
round urethane belts are made from both 80A and 88A durometer urethane cord.
The rough surface causes each to have the same lower coefficient
of friction (0.4) so that belts can slip a little in pulleys
without overheating and abrading. Rough blue round belting is
also ideal for carrying light items on slider beds or where accumulation occurs. It is not recommended for carrying heavy items because the resultant higher friction will eventually smooth out the rough surface and thereby increase the belt's coefficient of friction.
Rough blue urethane cord is often used in paper moving, printing,
and postal applications because the rough surface can catch the
edge of a sheet of paper and push it along.
People often think that
the rough textured surface will grip pulleys better and slip
less than smooth belts, but surface contact area is what counts
with urethane belting. The more surface contact, the greater
the coefficient of friction. Therefore, smooth belts will grip
better, but if forced to slip, they tend to overheat and stretch
or abrade. Rough blue belting can help overcome this problem.
- Rough surface effectively makes belts more abrasive resistant.
- The urethane material is food grade, but the rough surface may not be FDA approved for some applications.
- Replaces Polycord® belts and belting.
- Available in either rough or matte surface (slightly less rough).
- Rough blue cord is only available in 80A and 88A durometer. Smooth blue cord is available in 80A, 85A and 90A.
- Available with polyester cord reinforcement -- for less stretch and more strength.
- Superior water resistance (hydrolytically stabilized) -- ideal for washdown applications.
|
|
Rough Blue Round Urethane Cord 
| Size (diameter) |
mm |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
12 |
15 |
18 |
| inch |
0.08 |
0.12 |
0.16 |
0.20 |
0.24 |
0.28 |
0.31 |
0.35 |
0.39 |
0.47 |
0.59 |
0.71 |
| Minimum Pulley Dia. |
mm |
16 |
27 |
36 |
45 |
54 |
63 |
72 |
81 |
90 |
108 |
135 |
162 |
| inch |
0.63 |
1.06 |
1.42 |
1.77 |
2.13 |
2.48 |
2.83 |
3.19 |
3.54 |
4.25 |
5.31 |
6.38 |
| Max Belt Loading |
kg |
0.2 |
0.5 |
0.9 |
1.4 |
2.0 |
2.7 |
3.5 |
4.4 |
5.4 |
7.8 |
12.2 |
17.6 |
| lbs. |
0.5 |
1.1 |
1.9 |
3.0 |
4.3 |
5.9 |
7.7 |
9.7 |
12.0 |
17.3 |
27.0 |
38.9 |
| Recommended Stretch |
8% to 16% |
8% to 16% |
8% to 16% |
8% to 16% |
8% to 16% |
8% to 16% |
8% to 16% |
8% to 16% |
8% to 16% |
8% to 16% |
8% to 16% |
8% to 16% |
Rough Blue Round Urethane Cord Reinforced
with Polyester
| Size (diameter) |
mm |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
12 |
15 |
18 |
| inch |
0.16 |
0.20 |
0.24 |
0.28 |
0.31 |
0.35 |
0.39 |
0.47 |
0.59 |
0.71 |
| Minimum Pulley Dia |
mm |
40 |
50 |
60 |
70 |
80 |
90 |
100 |
120 |
150 |
180 |
| inch |
1.6 |
2 |
2.4 |
2.75 |
3.15 |
3.54 |
3.94 |
4.72 |
5.91 |
7.09 |
| Max Belt Loading |
kg |
8 |
12 |
18 |
20 |
28 |
33 |
42 |
60 |
98 |
140 |
| lbs. |
17 |
26 |
40 |
44 |
62 |
73 |
93 |
132 |
216 |
309 |
| Maximum Stretch |
1% |
1% |
1% |
1% |
1.5% |
2% |
2% |
2% |
2% |
2% |
| Reinforcement Drill Bit # |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
2 |
2 |
3 |
For the best in rough blue belting and belts, insist on DuraBelt.
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