Fenner Dunlop Ultra X® – Technobalt Estonia
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Fenner Dunlop Ultra X®
Ultra X Cross Section

Fenner Dunlop Ultra X®

Textile Belts

In a great many industries, up to 80% of conveyor belts have to be replaced because of accidental damage long before they are worn out. Even the thickest, heaviest belts can be ripped, torn or punctured by heavy, sharp materials or foreign objects falling from a height or becoming trapped. Belts can often be destroyed within a matter of weeks or months. The answer is – Ultra X, our super strength abrasion-resistant breaker weft construction single-ply belt.

Type: Textile
Best for: Crushed rocks, Potash
Available resistances: Abrasion, Anti-static, Cold, Fire, Heat resistance, Oil resistance, Ozone & UV, Rip & impact
Key features: Unrivalled impact, rip and tear resistance, High strength, Excellent load support, Outstanding troughability

Application areas

Ultra X1 is a stronger alternative to 250/2, 315/2 and 400/3 abrasion-resistant multi-ply belts.

Ultra X3 is designed as a stronger alternative to 500/3, 500/4, 630/3 and(630/4 abrasion-resistant multi-ply belts.


In order to provide the most economical prices possible, Ultra X is only available in full rolls of 300 m or alternatively 2 X 150 m rolls if necessary.


How can a single-ply belt like Ultra X have a superior rip, tear and impact resistance compared to much thicker and heavier multi-ply belts?

The simple answer is the unique fabric ply that has been developed and is manufactured totally within Fenner Fenner Dunlop. Technically speaking, the fabric uses crimped polyester yarns that provide high strength low stretch. Combined with very strong ‘binder’ and ‘filler’ yarns that create strength and stability under load, the end result is exceptional rip, tear and impact resistance that is far superior to multiple layers of conventional fabric ply.

Single ply belt like Ultra X has to be spliced using the finger splicing method but what are the advantages of finger splicing?

Although it may take a bit longer, finger splicing has a huge advantage over step splicing because it retains up to 90% of the tensile strength, whereas a step splice will always create a proportional ‘loss’ of tensile strength equivalent to one ply. Another major advantage is that a properly made finger splice will invariably be much stronger and last considerably longer than a step splice

What kind of life expectancy do Ultra X belts have compared to much heavier, conventional multi-ply belts?

Under normal operating conditions, you can reasonably expect an Ultra X belt to last up to three times longer than the norm. First, there is the unique strength and toughness of the inner carcass. Second is the top quality Fenner Dunlop AA anti-abrasion covers that have excellent resistance to cutting, gouging, and abrasion that outperform typical DIN Y requirements by as much as 20% and which are also 100% resistant to the damaging effects of ozone and ultraviolet light.