Polyurethane round belts: efficiency and versatility in applications
Used in various industrial applications, polyurethane round belts are ideal for light transmissions, medium-low speeds, and low-load conveying.
Flexible, wear-resistant, high-precision. These are the main features of polyurethane round belts that bring interesting technical advantages to specific industrial applications; the most important ones:
A high coefficient of friction which ensures slip-free transmissions
Multidirectional flexibility which allows routing over small diameter pulleys
Low operating noise even at high speeds
Dimensional precision with tight tolerances for precision applications
Fatigue resistance
Fonte Google Gemini
Why polyurethane?
Thermoplastic polyurethane is used for round belts because it has excellent mechanical, chemical, and environmental features.
Mechanical features:
Hardness ranging from 84-95 Shore A
Tensile strength of 35-55 MPa
Elongation at break 400-600%
Excellent abrasion resistance
Elastic modulus at room temperature 10-50 MPa
Chemical and environmental features:
Resistance to mineral and synthetic oils
Good resistance to solvents
Thermal stability (from -40°C to +100°C)
Fonte Google Gemini
Standard supply dimensions
Diameter: from 2 mm to 15 mm
Lengths: supplied by the meter or welded endless to the required length
Dimensional tolerances: ±0.1 mm for diameters up to 10 mm
See the website section (enter ››)
Typical applications where polyurethane round belts are used:
Automation and robotics: transmission for precision rotary axes, automatic tensioning mechanisms, linear movements.
Textile industry: weaving looms, knitting machines, ironing and calendering systems
Packaging and logistics: light conveyor belts, dosing and filling systems, labeling machines
Which parameters should be considered in terms of design:
Working load (evaluation of static and dynamic stresses)
Operating speed
Working environment (temperature, presence of oils or chemical agents)
System geometry (bending radii, wrap angles)
Required precision (dimensional and positioning tolerances)
For pulleys, the recommended construction materials supplied by us are:
Anodized aluminum
Stainless steel
Nylon
Surface finishes: Ra 0.8-1.6 μm
Groove geometry: semicircular profile with a 10-15% allowance
To define the pulley diameter according to the polyurethane belt diameter, see the PDF document of the catalog (enter ››). In general, the pulley diameter must be at least 10-15 times the belt diameter.
Problems and solutions for polyurethane round belts
Premature wear (over-tensioning, misalignment, high temperatures)
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