X Series Group Best in class

UsFlex®

UsFlex®

UsFlex® logo

US = ultra strength
FLEX = best in class straight warp fabric

  • Not only are we the first to market straight warp, we are also 2x more rip resistant vs. competitors
  • Parallel planes locked together with built-in breaker binder to resist impacts  3x greater than traditional plied belts
  • Heavy-weight straight weave with binding cords that are the most durable

Belt characteristics

UsFlex owes its outstanding impact and tear-resistant characteristics to an innovative woven straight-warp carcass. This consists of heavy strands of polyester running lengthwise and heavy nylon strands running crosswise held in position by a strong binder  yarn. The strands are completely straight in both directions and not interlocked as in a conventional belt carcass. This allows the weft to float free from the warp, thereby minimizing the peak point of impact because the energy is absorbed over a larger area, providing maximum protection to the carcass.

The ultimate solution

In some applications, especially primary and secondary crushers, even the strongest and heaviest conventional belts can be ripped or torn by large lumps of heavy, sharp objects, either falling from a height or becoming trapped. Belts can often be destroyed within a matter of weeks or months. The Fenner Dunlop solution to this problem is UsFlex, which has longitudinal rip resistance more than two times that of multi-ply belts of equivalent rating because of our unique straight-warp construction. UsFlex provides impact resistance up to three times greater than that of conventional plied belting. This unequaled toughness means the belt will not be easily damaged in the loading and conveying of large, sharp material. As a result, UsFlex will provide the longest belt life in the harshest conveying conditions, guaranteed!

Exceptional rip resistance

Rip resistance is over five times that of conventional multi-ply belts with similar tensile strength.

Outstanding impact resistance

Compared to conventional multi-ply and solid woven belting, the impact resistance of UsFlex is proven to be significantly superior.

Unrivaled tear strength

The tear resistance of UsFlex also significantly exceeds that of conventional multiply belts with comparable tensile strength. Tests for rip and tear resistance are only made on the actual belt carcass so the top and bottom covers are always removed. This ensures that the thickness and quality of the cover do not influence the accuracy and consistency of the tests.

Available Cover Compounds

There are a lot of cover grades and cover compounds available for the UsFlex Carcass Family!

Select interesting properties to get detailed information.

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  • Black Diamond

    Standard ARPM Grade… Standard ARPM Grade II Cover Compound. Standard ARPM Grade II Cover Compound.

    • Abrasion
    • Cut/Gouge
  • Power Saver

    Bottom cover compound… Bottom cover compound only that is environmentally friendly Low rolling resistance means that less force… Bottom cover compound only that is environmentally friendly Low rolling resistance means that less force is required for a belt to roll over idlers. Reduced power consumption for the conveyor to run & lower operating costs. Optimal for above ground flat or low-incline…

    • Power Saver
  • Fireboss AR

    The only cover… The only cover compound on the market to meet the stringent CSA-A2 standards. Exceeds… The only cover compound on the market to meet the stringent CSA-A2 standards. Exceeds ARPM FR class 1 requirements. Ideal when an increased fire retardant level is desirable, as well as resistance to abrasion.

    • Abrasion
    • Fire
  • ZR2 ORB

    Resists combined effects… Resists combined effects of cold, abrasion and petroleum or oil based products Cold weather resistance… Resists combined effects of cold, abrasion and petroleum or oil based products Cold weather resistance to -50° F (-46° C) Great for conveying oil sands, bitumen, oil-sprayed coal and similar materials…

    • Abrasion
    • Cold
    • Oil
  • ZR1

    Highest resistance to… Highest resistance to heavy, continuous abrasion. Good resistance to cutting and gouging. Great… Highest resistance to heavy, continuous abrasion. Good resistance to cutting and gouging. Great in extreme temperatures.

    • Cold
    • Cut/Gouge
  • Sahara

    Top fire retardant… Top fire retardant and heat resistant product… Top fire retardant and heat resistant product…

    • Fire
    • Heat
  • ZR3

    Highest abrasion resistance… Highest abrasion resistance Increased service life without increasing cover thickness Good resistance to… Highest abrasion resistance Increased service life without increasing cover thickness Good resistance to cutting and gouging + frigid temperatures…

    • Abrasion

Family members

UsFlex® is available in the following carcass styles to match your specific applications:

  • UsFlex®
  • UsFlex W®
  • GrainFlex®
  • MineFlex®
  • LongFlex®
  • LongFlex W®
  • KordFlex®
  • Double UsFlex®
  • DynaFlex®
  • PowerFlex®

Cleats are available in this product for several cover compounds

Learn about Fenner Dunlop CleatLine®

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