Polyurethane Timing Belts

What Are Polyurethane PU Timing Belts?

Polyurethane (PU) timing belts are high-performance, flexible power transmission belts made from thermoplastic polyurethane and reinforced with cords such as steel or Kevlar. Known for their high wear resistance and dimensional stability, PU belts are widely used in automation, packaging, robotics, and other precision-driven industries.

1. Types of Polyurethane Timing Belts

• Open-End PU Belts: Ideal for linear drives, can be cut to custom lengths and connected using clamps or heat welding.
• Endless (Sleeve) Belts: Molded in a continuous loop, these belts offer excellent strength and uniform tension – great for high-speed drives.
• Truly Endless Belts: Customized without any joints, providing maximum durability and zero slippage.

2. Steel vs Kevlar Cord Reinforcement

Feature	Steel Cord	Kevlar Cord
Tensile Strength	Very High	High
Flexibility	Medium	High
Weight	Heavy	Light
Corrosion Resistance	Lower	Excellent

Choosing between steel and Kevlar depends on your application’s need for flexibility, load capacity, and environmental resistance.

3. Key Advantages of PU Timing Belts

• High wear resistance and durability
• Excellent dimensional stability
• Low noise during operation
• Chemical and oil resistance
• Available in custom profiles and coatings

4. Typical Applications

PU timing belts are used in a wide variety of industries and machines, such as:

• Automated packaging systems
• Conveyors and logistics equipment
• Medical devices and laboratory automation
• Printing and textile machines
• 3D printers and CNC machinery

5. Frequently Asked Questions

Are PU belts better than rubber belts?PU belts typically offer higher wear resistance and better precision in applications requiring low elongation and clean operation.Can PU timing belts be customized?Yes. At Jiver, we offer custom lengths, profiles, coatings, and cord types to suit your needs.What temperature range can PU belts withstand?Most PU belts operate reliably between -30°C to +80°C, with special grades extending beyond that.

6. Why Choose PU Timing Belts from Jiver?

• Over 15 years of manufacturing experience
• High-quality German-grade polyurethane material
• Precision extrusion and molding technologies
• Custom engineering support and fast delivery

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Polyurethane Timing Belts Catalog

The Material: Polyurethane (PU)；steel or kelvar cord

including the open end timing belts, sleeve timing belts, flex truly timing belts

These belts use steel tension cord encased in a polyurethane jacket with integral teeth. The method of manufacture ensures tight control of pitch length for applications where accurate positioning is required. Polyurethane is a non-crumbling, non-marking material with excellent resistance to mineral oils, greases and light acidic solutions making it an ideal material for food applications, on cigarette pressing machines and paper transporting systems.
Polyurethane belt drives are available in 3 pitch sizes, 2.5mm (T2.5), 5mm (T5 & AT5) and 10mm (T10 & AT10), with a selection of pilot bore pulleys. Double sided belts and long open end belt lengths are also available. For reciprocating drives clamping plates are available to retain the belts.
A new range of PU belts to operate on standard HTD pulleys is available in 5mm, 8mm and 14mm pitch in open end construction for high load reciprocating drives.

Manufactured in urethane with continuous helically wound steel cable cords, Jason's Uniflex belts are ideal for situations where high stress and load demands exceed the performance capacity of spliced belts or where the "tooling cost" of long length or non-standard endless belts are prohibitive. Truly endless and any length, Uniflex timing belts are suitable for all power transmission, high speed and sever conveying applications.

Jiver urethane belts can be made up with a variety of welded-on profiles to handle your specific applications. These profiles can be used as indexers, actuators, carriers, or pushers. They can provide accuracy in assembly, packaging and inserting operations. Custom profile designs are possible. jivers Uniflex belts are available from 1500 to 13,000 MM lengths and a maximum width of 150 MM.

Uniflex Special Constructions High flex steel cord Nylon fabric on the teeth (PAZ) Special back machining

Special backings available in: PU 85 ShA Linatex 40 ShA Neoprene Rubber 70 ShA Yellow PU 60 ShA Grey PU 60 ShA

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open end polyurethane timing belts

Ideal for linear drive and indexing applications, Jiver's Polyurethane open end belts are available in a variety of sizes, pitches and colors to meet all specifications. Belt styles include steel or Kevlar reinforcement, as well as high load (HP) and high flexibility (HPF). Belts can be spliced to specified lengths. Nylon fabric (PAR) is available on backside for low friction transport, as are high abrasion resistance and FDA-approved polyurethane backings. Nylon fabric (PAZ) is also available on the tooth side for low friction and noise reduction. Standard and non-standard widths available in pitch XL, L, H, XH, T5, AT5, T10, AT10, T20, AT20, 5MM, 8MM, and 14MM.

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Sleeve polyurethane Timing belts

For power transmission and linear positioning, jiver Industrial's polyurethane timing belts are designed for strength, ease of use and minimum maintenance. Polyurethane timing belts are available in all popular standard and metric pitches. Dual-sided belts are available in T5 and T10 pitches. We stock 300mm sleeves and can provide any required width from stock. Kevlar tensile cord can be substituted for steel on special orders.

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Flex truly polyurethane timing belts

Ideal for linear drive and indexing applications, Jason's urethane open end belts are available in a variety of sizes, pitches and colors to meet all specifications. Belt styles include steel or Kevlar reinforcement, as well as high load (HP) and high flexibility (HPF). Belts can be spliced to specified lengths. Nylon fabric (PAR) is available on backside for low friction transport, as are high abrasion resistance and FDA-approved polyurethane backings. Nylon fabric (PAZ) is also available on the tooth side for low friction and noise reduction. Standard and non-standard widths available in pitch XL, L, H, XH, T5, AT5, T10, AT10, T20, AT20, 5MM, 8MM, and 14M

Frequently Asked Questions

• What are polyurethane timing belts used for? PU timing belts are used in robotics, CNC machines, packaging, and high-load industrial drives.
• What’s the difference between steel and Kevlar cord? Steel cords offer higher tensile strength; Kevlar cords provide flexibility and resistance to corrosion.