MHI HASEG Planetary Traction Drive Units TRDB P Series (Single-Stage Type)

The MHI HASEG TRDB P Series is a single-stage planetary traction drive unit designed for ultra-high rotational precision, minimal backlash, and smooth, silent operation. As part of MHI HASEG's renowned TR DRIVE lineup, the P Series offers a balance of performance, reliability, and compact design, making it the ideal solution for high-precision machinery requiring stable, consistent torque transmission.

Key Features

• ✅ Single-Stage Traction Mechanism
  
  The P Series employs a simplified traction roller system with fewer components, making it ideal for compact, high-speed operations where minimal inertia and direct-drive characteristics are essential.
  
  

• ✅ High Rotational Accuracy
  
  With a transmission error of approximately 0.05% per revolution, the TRDB P Series ensures exceptionally smooth motion, outperforming even precision worm gears.
  
  

• ✅ Extremely Low Backlash
  
  Utilizing MHI HASEG's patented rolling contact system, the P Series delivers precise bi-directional motion with virtually zero mechanical backlash—a major benefit for servo-controlled or indexing applications.
  
  

• ✅ High Efficiency & Torsional Rigidity
  
  The design features an elastic preload ring that ensures uniform roller contact pressure, enabling up to 98% power transmission efficiency and enhanced torsional rigidity.
  
  

• ✅ Compact and Lightweight
  
  The single-stage structure minimizes space requirements while maintaining high torque output, making the P Series especially suited for advanced, compact machinery.
  
  

Technical Overview

• Type: Single-stage planetary traction drive

• Reduction Ratios: Nominal i = 5, 6.3, 8, 10, 12.5

• Efficiency: Up to 98%

• Backlash: Practically zero (non-backlash mechanism)

• Noise Level: Extremely low, even under load

• Mounting Configurations: Horizontal (H), Vertical (V/W)
  
  

Applications

The TRDB P Series is widely used in precision-driven industries, including:

• Semiconductor manufacturing equipment

• Photographic and printing systems

• High-speed testing and measuring machines

• X-Y positioning tables

• Industrial automation and robotics

• Film coating and thickness control systems
  
  

Typical Model Example

TRDB100H-31.5RX

• TRDB: Planetary traction drive unit

• 100: Frame size

• 1: Single-stage type

• 31.5: Reduction ratio

• R: Horizontal installation

• X: Non-backlash high-precision version
  
  

Why Choose TRDB P Series?

•  Single-stage simplicity with high-end precision

•  Engineered for servo and motion control integration

•  Ultra-low vibration and noise across operating speeds

•  Ideal for high-speed, compact mechanical systems

•  Proven performance with patents in major global markets

MHI HASEG Planetary Traction Drive Units: TRDB P Series（Single-Stage Type）