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

The MHI HASEG TRDF P Series (Double-Stage Type) is a compact, high-precision planetary traction drive unit engineered for applications requiring higher reduction ratios, zero backlash, and ultra-smooth torque transmission. Based on MHI HASEG’s globally patented rolling contact technology, this dual-stage model achieves exceptional control performance in space-limited environments.

Key Features

• ✅ Double-Stage Traction Mechanism
  
  Utilizing two sets of traction roller assemblies, this model delivers higher reduction ratios (up to 80:1 or more) with excellent transmission accuracy, while maintaining a compact footprint.
  
  

• ✅ Backlash-Free Design
  
  Each stage features an elastic ring to control preload on the rollers, ensuring non-backlash torque delivery for precise forward/reverse servo motion.
  
  

• ✅ High Rotational Accuracy
  
  The TRDF P Series offers a rotational error as low as 0.05% per revolution, supporting advanced positioning and indexing applications.
  
  

• ✅ Low Noise and Vibration
  
  The oil-film-based roller system ensures quiet and smooth operation even under load, making it ideal for cleanroom, medical, or high-speed testing environments.
  
  

• ✅ Pre-Filled Lubrication
  
  Unlike conventional gearboxes, the TRDF P Series is shipped pre-lubricated, minimizing installation time and ensuring optimal startup conditions.
  
  

• ✅ High Efficiency in Multi-Stage Transmission
  
  Despite its dual-stage configuration, the unit maintains efficiency of approximately 96–97%, ideal for continuous operation in servo-driven automation.
  
  

Technical Specifications

• Type: Double-stage planetary traction drive

• Reduction Ratios: 31.5:1, 40:1, 50:1, 63:1, 80:1 (varies by model)

• Efficiency: ~96–97%

• Backlash: Practically zero

• Rotational Error: Approx. ±0.05%

• Lubrication: Pre-filled with specified oil

• Mounting: Horizontal (R)

• Frame Sizes: 50, 63, 80, 100
  
  

Typical Applications

The TRDF P Series (Double-Stage Type) is ideal for:

• Semiconductor transport and inspection units

• Precision robotic arms and multi-axis positioning platforms

• Gravure coating and film thickness control

• Optical metrology and photoengraving machines

• Compact medical imaging and diagnostics systems

• Laser cutting, marking, and cleanroom automation

Example Model

TRDF63H-31.5RZ

• TRDF: Planetary traction drive (pre-filled oil)

• 63: Frame size

• H: Double-stage P Series

• 31.5: Reduction ratio

• R: Horizontal installation

• Z: Standard
  
  

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

•  Higher reduction ratios with compact form

•  Quiet, vibration-free roller contact transmission

•  Perfect for servo-controlled high-precision systems

•  Easy installation with pre-lubricated design

•  Trusted worldwide for high-efficiency motion control

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