MHI HASEG Planetary Traction Drive Units TRDF P Series (Triple-Stage Type)

The MHI HASEG TRDF P Series (Triple-Stage Type) is a high-precision planetary traction drive unit engineered for ultra-high reduction ratios, zero backlash, and exceptionally smooth torque transmission. With its patented triple-stage rolling contact system and pre-lubricated, compact construction, this unit delivers reliable and precise performance in mission-critical and space-constrained environments.

Key Features

• ✅ Triple-Stage Traction Mechanism
  
  Incorporates three stages of roller-based traction drive, enabling reduction ratios of 250:1 and higher without sacrificing precision or increasing footprint.

• ✅ Non-Backlash, Ultra-Smooth Operation
  
  Each stage features MHI HASEG’s unique elastic ring preloading system, maintaining constant roller contact and ensuring zero mechanical backlash, ideal for bi-directional servo motion and precision indexing.
  
  

• ✅ Exceptional Rotational Accuracy
  
  Delivers transmission error as low as ±0.05%, enabling precise motion control in semiconductor, optical, and metrology applications.
  
  

• ✅ Low Noise & Low Vibration
  
  The oil-film-based rolling contact system eliminates gear mesh noise and reduces vibration, providing a quiet and clean transmission solution.
  
  

• ✅ Pre-Lubricated for Easy Installation
  
  The TRDF P Series (Triple-Stage Type) is pre-filled with high-grade lubricating oil, eliminating startup risks and reducing installation time.
  
  

• ✅ High Multi-Stage Efficiency
  
  Maintains mechanical efficiency of approximately 95–96%, outperforming traditional gear reducers in long-term operation.
  
  

Technical Specifications

• Type: Triple-stage planetary traction drive

• Reduction Ratios: 125:1, 250:1, 500:1

• Efficiency: ~95–96%

• Backlash: Virtually zero

• Rotational Error: ±0.05% or better

• Mounting Types: Horizontal (R)

• Frame Sizes: 50, 63, 80, 100

• Lubrication: Pre-filled oil system (no need for initial oil filling)
  
  

Applications

The TRDF P Series (Triple-Stage Type) is ideally suited for:

• Semiconductor wafer and inspection systems

• Laser alignment and high-resolution etching

• Precision measurement equipment

• Robotic joints and actuators

• Film coating and reverse roll systems

• Medical imaging and laboratory automation
  
  

Example Model

TRDF100H-500RX

• TRDF: Pre-lubricated planetary traction drive

• 100: Frame size

• H: Triple-stage P Series

• 500: Reduction ratio

• R: Horizontal mount

• X: Non backlash
  
  

Why Choose TRDF P Series (Triple-Stage Type)?

•  Achieve ultra-high reduction ratios in minimal space

•  Enjoy smooth, silent, and backlash-free operation

•  Ideal for advanced servo applications and micro-movement control

•  Factory pre-filled lubrication for zero-hassle setup

•  Globally trusted traction technology with proven reliability

MHI HASEG Planetary Traction Drive Units: TRDF P Series（Triple-Stage Type）