What is the difference between TPU timing belts and CPU timing belts?

TPU timing belts utilize thermoplastic polyurethane (TPU), formed directly through extrusion molding. This relatively simple process offers production flexibility, suitable for open belts or splicing into closed loops. However, splicing points may compromise tensile strength. Characterized by high hardness (approximately 92 Shore A) and enhanced rigidity, the tensile layer typically incorporates steel cord or aramid fiber reinforcement.

CPU timing belts utilize cast polyurethane (CPU), formed in a single seamless loop via liquid casting. Their hardness approaches that of rubber belts (approximately 65 Shore A), offering superior elasticity. The tensile layer typically incorporates nylon wire or Kevlar core strands. The seamless design enhances tensile strength, making them suitable for high-precision power transmission applications.

Analysis of Advantages and Disadvantages in Application Scenarios for TPU and CPU timing Belts

TPU timing belts are primarily used in industries with high hygiene requirements (food, pharmaceuticals, electronics) due to their dust-free material and ease of cleaning. Secondly, they are applied in moderate-load linear transmission systems such as ceramic conveyor belts, packaging machinery, and glass handling equipment.

Disadvantages: Limited tensile strength, unsuitable for high-torque power transmission.

CPU timing belts are primarily used in high-precision power transmission (e.g., automation equipment, CNC machine tools) due to their seamless design that minimizes transmission errors. They are also suitable for applications requiring fatigue resistance (e.g., industrial machinery with frequent starts/stops) and high-speed transmission machinery.

Disadvantages: Higher manufacturing costs compared to rubber; stricter storage requirements than rubber, necessitating constant temperature, dry conditions to prevent color changes.

summarize

TPU timing belts are better suited for hygienic, low-load transmission scenarios. Their advantages include wear resistance and chemical resistance, while their disadvantage is limited tensile strength.

CPU timing belts perform better in high-precision power transmission and harsh environments, but come with higher storage costs. Actual selection requires comprehensive consideration of load, environment, and budget.

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