MHI HASEG Planetary Traction Drive Units TRDB H Series

The MHI HASEG TRDB H Series Planetary Traction Drive Units are high-performance mechanical speed reducers/increasers designed for both high- and low-speed applications. Utilizing MHI HASEG’s proprietary TR DRIVE technology, these units provide smooth, quiet, and precise torque transmission unmatched by conventional gear systems.

Key Features

• ✅ High-Speed & Low-Speed Compatibility
  
  The TRDB H Series supports both high-speed and low-speed operational requirements. The high-speed type is ideal for precision machinery and semiconductor processing, while the low-speed variant supports applications requiring stable, torque-intensive operation.
  
  

• ✅ Rolling Contact Traction Mechanism
  
  Unlike traditional gear reducers, the TRDB H Series uses a roller-based power transmission system composed of a sun roller, planetary rollers, and a U-section elastic ring. This mechanism ensures high precision with virtually zero backlash.
  
  

• ✅ Exceptional Rotational Accuracy
  
  With transmission error as low as 0.05%, the H Series ensures ultra-smooth rotation with minimal speed fluctuation. Ideal for high-precision indexing and positioning tasks.
  
  

• ✅ Low Noise & Low Vibration
  
  TRDB H Series units produce significantly lower noise compared to planetary gear systems. Even under load, they maintain quiet, low-vibration performance thanks to their rolling contact and preloaded elastic ring design.
  
  

• ✅ High Efficiency
  
  Achieving up to 98% efficiency, the H Series eliminates power loss from gear backlash and sliding friction, making it suitable for energy-sensitive systems and continuous-duty cycles.
  
  

• ✅ High Torsional Rigidity
  
  Enhanced rigidity ensures minimal angular displacement under torque load, improving control response and servo performance.
  
  

Technical Highlights

• Backlash: Practically zero (non-backlash mechanism)

• Transmission Error: Approx. 0.05% per revolution (compared to 1–2% in precision worm gears)

• Noise Level: 2 μp-p at 1800 rpm (no load)

• Efficiency: Up to 98%

• Lubrication: Oil bath (proper oil type and level required for all except S series)

• Structure: Roller preload via elastic ring – patented globally
  
  

Typical Applications

The TRDB H Series is engineered for advanced automation and manufacturing systems requiring ultra-precise motion and high speed. Applications include:

• Semiconductor production lines

• Laser cutting and photoengraving machinery

• High-speed test and inspection equipment

• Gravure/reverse-roll coating systems

• X-Y precision positioning tables

• High-speed indexing equipment

• Medical and cleanroom automation

• Industrial robots and actuators
  
  

Why Choose the TRDB H Series?

•  Superior precision and control

•  Exceptionally quiet and smooth

•  Designed for servo and high-speed motors

•  Globally patented traction technology

•  High durability and reliability in critical systems

MHI HASEG Planetary Traction Drive Units: TRDB H (Increase or Reduction Speed) Series（H: Horizontal Type）

MHI HASEG Planetary Traction Drive Units: TRDB H (Increase or Reduction Speed) Series（V: Vertical ）

MHI HASEG Planetary Traction Drive Units: TRDB H (Increase or Reduction Speed) Series（W: Vertical ）