5M PU Open Ended Herringbone Timing Belt

Product Overview

The 5M PU Open Ended Herringbone Timing Belt (also called 5mm pitch double helical synchronous belt) is a high-precision power transmission solution engineered for linear motion systems, long-center-distance drives and low-noise industrial equipment. Featuring a symmetrical herringbone (helical offset tooth) profile and premium thermoplastic polyurethane construction, this open-ended belt combines the slip-free positioning accuracy of synchronous belts with the quiet, self-guiding performance of helical tooth geometry.

Supplied in continuous roll form and cut to custom lengths per application requirements, the 5M open herringbone belt eliminates the length limitations of endless molded belts. It is reinforced with continuous high-tensile steel cords (aramid optional) for exceptional stretch resistance and dimensional stability. Unlike standard straight-tooth open timing belts, the offset helical tooth design creates gradual, continuous meshing with mating pulleys, significantly reducing impact noise and lateral vibration — making it the preferred choice for precision machinery and noise-sensitive production environments.

Key Design Features & Performance Benefits

1. Herringbone Tooth Profile: Ultra-Quiet & Self-Tracking

• The double helical herringbone tooth structure distributes meshing pressure progressively across the tooth flank, eliminating the sudden impact common with straight-cut timing teeth. This design reduces operational noise by up to 11 dB compared to equivalent straight-tooth 5M belts, delivering near-silent performance even at high linear speeds.
• Symmetrical helical teeth cancel out axial thrust forces, providing inherent self-tracking capability. The belt runs stably on flat pulleys without the need for side flanges, reducing pulley cost, installation complexity and side-edge wear over long operating cycles.
• Continuous tooth engagement minimizes backlash and vibration, ensuring smoother motion and more accurate positioning in high-precision linear drive and conveying systems.

2. Premium Thermoplastic Polyurethane (PU) Body

• Manufactured from high-grade thermoplastic polyurethane, the belt body delivers outstanding abrasion resistance, long-term dimensional stability and excellent resistance to oils, greases, fuels, ozone and UV exposure, suitable for both indoor industrial workshops and semi-outdoor equipment.
• The PU formulation maintains consistent hardness and flexibility across an operating temperature range of -30°C to +80°C, retaining transmission performance in both cold and warm working conditions without premature cracking or softening.
• Homogeneous PU construction produces minimal dust and debris during operation, supporting clean production requirements in packaging, electronics and light processing industries.

3. High-Strength Tensile Cord Reinforcement

• Continuous, parallel-aligned steel tension cords run the full length of the open belt, providing extremely high tensile strength and near-zero elongation under rated load. This ensures consistent timing accuracy and belt tension over extended service life, eliminating frequent re-tensioning for long-center-distance installations.
• Aramid fiber cord reinforcement is available as an option for applications requiring lighter weight, higher flex fatigue resistance or non-magnetic operation.

4. Open-Ended Design for Maximum Flexibility

• Supplied in continuous roll form, the belt can be cut to any exact required length on site, perfectly adapting to custom center distances, long linear gantries and special conveyor layouts where standard endless belt sizes are unavailable.
• The open ends can be thermally welded into endless loops using dedicated welding equipment, providing a cost-effective alternative to molded endless belts for low-volume custom length requirements.
• Standard roll lengths of 50m and 100m are available, supporting both small prototype builds and bulk production line installations.

Technical Specifications

Industrial Applications

The 5M open-ended PU herringbone timing belt is widely deployed across industries where quiet operation, precise positioning and flexible length configuration are required:

• CNC & automation equipment: laser cutting machines, engraving machines, 3D printers, linear gantry systems and pick-and-place robotics
• Packaging & converting machinery: form-fill-seal lines, labeling machines, web handling equipment and synchronized conveying systems
• Textile machinery: knitting machines, spinning frames and fabric processing lines requiring low-vibration synchronous drive
• Woodworking machinery: precision cutting and edge banding equipment with noise-sensitive workshop requirements
• Material handling: long-distance synchronous conveyors, sorting equipment and automated storage & retrieval systems
• Door & gate drives: automatic sliding doors, industrial sectional doors and long-travel access control systems
• Electronics manufacturing: cleanroom-compatible conveying and positioning assemblies

Why Source 5M Herringbone Timing Belts from Yonghang Belt?

• Strict quality control: Every production batch undergoes dimensional inspection, tension testing and noise performance verification to ensure consistent performance.
• Full customization: Custom belt widths, special cord materials (steel / aramid), custom cut lengths and special PU formulations (antistatic, low-temperature) are available to match exact equipment specifications.
• Technical support: Our engineering team provides professional guidance on pulley matching, welding procedures, tension settings and drive layout optimization.
• Ready stock & fast delivery: Standard widths of 5M open herringbone belts are kept in stock for immediate dispatch, with secure export packaging and worldwide shipping options.
• Bulk pricing advantage: Competitive volume pricing for OEM manufacturers, industrial distributors and system integrators, with flexible minimum order quantities.

Installation & Maintenance Tips

To maximize service life and transmission performance of your 5M open-ended herringbone timing belt:

1. Verify pulley tooth profile compatibility before installation; use matching 5M herringbone pulleys for optimal meshing and self-tracking performance.
2. When welding into endless form, follow standard PU belt welding procedures to ensure a strong, dimensionally consistent joint; avoid overheating which can degrade the PU material and internal cords.
3. Apply correct belt tension according to load and speed specifications. Over-tensioning will accelerate cord fatigue and reduce bearing life; insufficient tension may cause tooth jump or tracking deviation.
4. Keep the drive system clean of abrasive dust, metal chips and corrosive solvents to prevent premature tooth wear and surface degradation.
5. Inspect the belt periodically for signs of edge fraying, tooth chipping or surface cracking. Replace the belt if visible damage is detected to avoid unexpected downtime.
6. Avoid sharp bending or crimping of the belt during storage and handling, as this can damage internal tension cords and lead to premature failure.

Frequently Asked Questions

Q: What is the main advantage of herringbone timing belts over straight-tooth timing belts? A: Herringbone (double helical) belts provide significantly quieter operation, lower vibration, inherent self-tracking capability and smoother meshing. They eliminate axial thrust forces and reduce impact noise during tooth engagement, making them ideal for precision and noise-sensitive applications.

Q: Can this open-ended 5M herringbone belt be joined into an endless belt? A: Yes, the open ends can be thermally welded into a continuous endless loop using standard PU belt welding equipment. This allows custom length belts for non-standard center distances without full mold tooling.

Q: What does "5M" stand for in the belt specification? A: "5M" indicates a 5mm tooth pitch, meaning the distance between the centers of two adjacent teeth is 5 millimeters. It follows the HTD standard tooth geometry adapted to a herringbone helical layout.

Q: Are custom widths and special cord materials available? A: Yes, we offer custom cutting for belt widths from 6mm to 100mm, and can supply belts with aramid fiber cords for lightweight or non-magnetic applications, as well as antistatic PU formulations for electronics manufacturing environments.

Browse our full range of open-ended herringbone timing belts in 3M, 5M, 8M and 14M pitches, or contact our technical sales team for custom sizing and application support.