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PU Timing Belts

Polyurethane is a good choice for making timing belts utilized in various power transmission systems and roller conveyor systems. PU timing belts are preferred by many in the industry due to their relatively simple cleaning and maintenance. PU timing belts are well-suited for precise and crucial applications across diverse industries such as aerospace, healthcare, motion control, manufacturing, packaging, telecommunications, robotics, consumer products and more. 






Helical Offset Tooth-Series


Self Tracking-Series

Double Sided-Series




Materials of PU Timing Belts

Polyurethane is ZZR’s preferred material for timing belts. Polyurethane covers a broad array of thermoplastic elastomers, each designed for particular applications.

PU timing belts are made from high-quality thermoplastic polyurethane, ensuring smooth operation and excellent resistance to abrasion. PU timing belts come with a variety of cord types, coatings, and/or cams to suit diverse needs.

There are two types of PU materials for belt body,  Cast Polyurethane (Molded) and Thermoplastic Polyurethane (Extruded).  Usually Cast PU is transparent, while Thermoplastic PU is white. Custom sizes, materials and color available upon request.

Cast PU before the molding is liquid, while Thermoplastic PU is solid before molding. The advantage is good temperature resistance, high strength. Wide range of hardness, can be very soft and extremely hard.

Special materials for applications demanding: low temperature, high temperature, antistatic properties or food compatibility (FDA) .

Diversity in cord options:

Tensile cord is available in Steel, Kevlar, Nylon, Stainless Steel.  

  • Steel is the standard tension member. It features mild corrosion resistance and a high spring rate.
  • Kevlar (Aramid) has excellent chemical and corrosion resistance. This non-metallic materials is available with Food Grade Polyurethane materials.
  • Stainless steel is chemical and corrosion resistance with a high spring rate and also available with Food Grade Polyurethane materials.

Coatings and Coverings

  • Nylon fabric on backside (PAR)
  • Nylon fabric on tooth side (PAZ)
  • Nylon fabric on tooth and backside (PAZ/PAR)
  • Antistatic Fabric
  • Polyurethane, Rubber and PVC, available upon request.

Special manufacturing processes:

  • Perforations
  • Cams
  • Vacuum chambers
  • Water jet
  • CNC milling and grinding

Tracking Guides Options:

K6, K8, K10, K12, K13 & K15, while custom sizes (lengths, widths and heights) are available upon request. 


  • Precise positioning
  • Resistant to abrasion
  • Excellent chemical durability/resistance
  • High flexibility
  • Low noise
  • Suitable for high-speed applications

PU Timing Belts are offered in the following variations:

  • Open
  • Truly endless (Flex & molded)
  • Endless with a splice
  • Mechanical linking methods (such as PinJoin, Breco DC and plastic spiral)


  • What is the use of PU timing belt ?
    PU timing belts find application across a wide range of fields, spanning from small handheld devices and high-performance drives for woodworking machinery and construction to miniature drives and precision positioning systems.


  • Which is better rubber or PU belt ?
    Polyurethane timing belts have greater resistance to wear compared to rubber timing belts.
    Polyurethane timing belts demonstrate higher resistance to chemicals like acids and alkalis, with each type possessing distinct characteristics.
    As of now, polyurethane timing belts have not been able to fully replace rubber timing belts, for example, the automotive industry.


PU timing belts are ideal for packing industry; glass industry; stone & marble industry; ceramics squaring machines; logistics; positioning system; mail sorting machines; office machines; plotter; medical equipment; vending machines; optical instruments; IT systems; wood processing machines; textile machines; machine tools; cameras; robot; vacuum systems; food machinery; garden equipment; printing machines; pumps; compressors; construction machinery; automation; elevators; shipping lines; electrical appliances; conveyors; automatic sliding doors; garage opening system; automatic handling devices; chemical and pharmaceutical industry; linear drivers; tobacco; paper industry; chemist & pharmaceutical industry and other applications.

Mechanical and Chemical Properties, Product Characteristics

  • Excellent length stability;
  • The minimum tension decay;
  • Low pretension and shaft load;
  • Pretensioning minimized;
  • High abrasion resistance;
  • Silent operations;
  • Maintenance free;
  • Resistant to aging, ozone and hydrolysis;
  • Working temperatures between -25°C to + 80°C;
  • High chemical resistance and in particular to oils, greases and gasoline;
  • Good resistance to acids and alkalis;
  • Executions available on request: Silicon free, FDA, antistatic;
  • High linear and angular positioning precision.
  • High performance power transmission;
  • Special compound PU53 for high temperatures;
  • Standard natural color, special colors available on request;
  • Available in VACUUM applications execution;
  • Available in dual-toothed execution (DUAL).