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Rough Green Round Belting and Belts

Dura-Belt rough green round urethane belts are made from 88A or 90A durometer urethane cord. The hard, rough surface is textured to provide a lower coefficient of friction (0.4) so that belts can slip a little in pulleys without overheating and abrading. Rough green 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 green 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 green 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).
  • Available in softer 86A durometer for applications where more grip is desirable.
  • Available with polyester cord reinforcement -- for less stretch and more strength.
  • Superior water resistance (hydrolytically stabilized) -- ideal for washdown applications.
rough green polyurethane oring belts
Rough Green 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 Green 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

Also see:   Cord Profiles, Abuse Resistant Powered Roller Belts, Rough Blue Belts,
Rough Green Lineshaft Belts, and Abuse Resistant Rough Green Twisted Belts
For the best in rough green belting and belts, insist on DuraBelt.
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