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Compact Internal Spur Gears Power Transmission

Internal Gears
December 26, 2025
Category Connection: Internal Spur Gear
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Tags:
#Steel Internal Spur Gear #Internal Spur Gear #internal involute gear
Brief: Need quick answers about practical use? This video highlights the essentials. Discover how internal spur gears with their compact internal meshing structure enable efficient power transmission in space-constrained applications. We'll walk you through their key features, operational advantages, and real-world uses in industries like automotive transmissions, robotics, and medical devices.
Related Product Features:
  • Features an internal meshing structure where the outer gear nests inside the inner gear for a compact footprint.
  • Reduces center distance significantly, minimizing the overall volume of the transmission system.
  • Provides superior transmission smoothness with optimal tooth surface contact direction during internal meshing.
  • Operates with notably lower noise levels, typically 5-10dB quieter than externally meshed gears.
  • Suitable for applications with stringent volume constraints like planetary gear mechanisms in automotive automatic transmissions.
  • Ideal for compact reducers in robotic joint systems and power tool drive mechanisms.
  • Used in medical devices such as wheelchair drive mechanisms and micro-transmission modules in precision instruments.
  • Available as custom-made gears with modules ranging from 0.5 to 25 and various steel code grades.
FAQs:
  • What is an internal spur gear and how does it work?
    An internal spur gear is a gear with teeth distributed along the inner surface of a ring-shaped component. It works by meshing with an external gear, such as a pinion or planetary gear, to enable power transmission and speed conversion within limited spatial constraints.
  • What are the main advantages of using internal spur gears?
    The main advantages include a compact overall footprint due to the internal meshing structure, reduced center distance that minimizes transmission system volume, superior transmission smoothness from optimal tooth contact, and significantly lower operational noise levels (typically 5-10dB quieter than externally meshed gears).
  • In which applications are internal spur gears commonly used?
    Internal spur gears are suitable for applications with stringent volume constraints, including planetary gear mechanisms in automotive automatic transmissions, compact reducers for robotic joints, power tool drive systems, medical devices like wheelchair drive mechanisms, and micro-transmission modules within precision instruments.
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