Short answer: There is no single minimum diameter, because the limit is set by the cord, the belt thickness and the pitch rather than by PU itself. Belt makers normally state it as a minimum number of teeth on the small pulley. As a working starting point, keep at least six teeth in mesh, and avoid small pulleys below roughly 15 to 20 teeth on standard steel-corded PU belts; aramid and high-flex c...

Short answer: Most PU timing belts are made between 80A and 95A Shore A, and 85A to 92A covers the majority of industrial drives. Practical tolerance windows are around plus or minus 0.5 mm on width and thickness for common sizes, and roughly plus or minus 0.3 to 0.5 percent on pitch length. Tighter figures are possible, but only after the actual construction is fixed, because cord type, belt thic...

Short answer: yes — thermoplastic PU timing belts are naturally more oil-tolerant and considerably more abrasion-resistant than most rubber constructions, which is why they dominate in oily, dusty and dry-running conveying and linear drives. Antistatic versions are also standard practice where static build-up matters. The exact behavior depends on the PU grade, cord and any cover, so specify the ...

Short answer: PU timing belts usually drift or mistrack because of pulley misalignment (shafts not parallel or not square to the belt path), incorrect or unstable tension, worn or damaged pulley teeth and flanges, debris in the drive, or a poorly made weld on an endless joined belt. Fix it in that order: check alignment first, then tension, then pulley condition, then cleanliness — and only then ...

Short answer: seamless (truly endless) PU timing belts are extruded with no joint and offer the most uniform running and best fatigue life — the usual choice for high-speed or precision drives. Welded belts are made from open-end PU strip whose steel or aramid cords are joined with a connector or thermally welded loop; they are quicker to obtain in long or non-standard lengths and convenient for ...

Short answer: yes — PU (thermoplastic polyurethane) timing belts are widely used in food handling, packaging and pharmaceutical machinery because they are abrasion-resistant, oil-resistant, non-sticky and easy to keep clean. Important limits apply: for direct contact with food you need belts made with materials suitable for that contact (for example a food-grade cover or a declared food-contact T...

Short answer: choose steel cord when you need maximum rigidity, minimal elongation and precise positioning (linear drives, robotics, long spans). Choose aramid (Kevlar-type) cord when the drive sees shock loads, frequent starts, small pulleys, or humid and corrosive conditions. Both run inside the same PU body — the cord decides stretch, flexibility and durability. Side-by-side comparison Proper...

Short answer: standard PU (thermoplastic polyurethane) timing belts typically serve ambient temperatures of roughly -20 °C to +80 °C. Outside this window the polyurethane body gradually loses flexibility and tensile strength. Special TPU grades and matching cord combinations can extend the range somewhat — tell us the real operating conditions and we will confirm feasibility before you order. Why...

Short answer: PU timing belts offer higher wear resistance, oil resistance and cleanliness; rubber timing belts offer better vibration damping, lower cost and wider temperature tolerance at both extremes. Choose PU for clean, oily, precise or hygienic drives (packaging, food handling, robotics, small conveyors); choose rubber for general power transmission, high torque and harsher environments. S...

Correct installation and scientific maintenance are the key to maximizing the service life of PU timing belts. The specific operations are as follows: Standard Installation Steps Pulley preparation Ensure that the driving and driven pulleys are aligned concentrically and parallelly; the misalignment tolerance should not exceed 0.1 mm per meter of center ...

Selecting a suitable PU timing belt requires comprehensive consideration of transmission parameters, application environment and structural matching. The specific key factors are as follows: Transmission performance requirements First, confirm the load capacity: PU timing belts are suitable for light-to-medium load transmiss...

PU timing belts outperform traditional rubber timing belts in several key aspects, making them ideal for high-precision, light-to-medium load industrial applications: Superior wear resistance and long service life PU (polyurethane) material has inherent high wear resistance, 2–3 times that of ordinary rubber. It is not easy ...