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Timing belt pulleys without hubs, also known as hubless timing belt pulleys, are mechanical components used to transmit power and motion between a timing belt and a shaft or pulley. They consist of a toothed belt, which meshes with the teeth of the pulley, and a flange or rim that attaches to a shaft or pulley. Unlike traditional timing belt pulleys, hubless pulleys do not have a central hub or bore.
Hubless timing belt pulleys are commonly used in applications where a low profile or compact design is required, such as in robotics, automation equipment, and packaging machinery. They are also used in applications where a precise and consistent rotational speed is required, such as in printing presses and textile machinery.
Hubless timing belt pulleys are available in a variety of sizes and configurations, including:
- Pitch sizes: Hubless timing belt pulleys are available in a range of pitch sizes, from 2mm to 20mm, depending on the application requirements.
- Tooth profiles: Hubless timing belt pulleys can be used with a range of tooth profiles, including HTD, GT, and Poly Chain.
- Flange or rim configurations: Hubless timing belt pulleys can have a variety of flange or rim configurations, including single or double flanges, and straight or crowned rims.
Materials commonly used in hubless timing belt pulleys include aluminum, steel, and plastic. Specialized materials, such as stainless steel or ceramic, can also be used for high-temperature or corrosive environments.
Proper selection, installation, and maintenance of hubless timing belt pulleys are important to ensure optimal performance and longevity of equipment. Factors to consider when selecting hubless timing belt pulleys include pitch size, tooth profile, bore size, and flange or rim configuration.