The RD-C Series Gear Head from Nabtesco combines Precision (less than 1 arc-min backlash), Durability (up to 5X E-Stop torque) and Hollow Shaft options (up to 5" diameter thru hole) in one complete easy-to-mount package. The RD-C has integrated bearings to support heavy external loads and the Patented Cycloidal design provides extreme rigidity and high ratios. The RD-C is ideal for any high performance positioning application. Sizes are available with output torque up to 390,373 in-lbs (E-Stop); moment capacity to 780,570 in-lbs and ratio’s up to 400:1.





The large thru-hole (up to 5”) can accommodate cables, shafts, etc. to provide the most efficient and space saving design possible. The main internal angular support bearings provide large moment capacities and negate the need for external support devices – reducing design time and installation costs.

• Less than 1 arc-min Backlash
• Complete Gear Head version ready-to-mount (grease included)
• Easy motor mounting for all Metric & NEMA sizes
• Hollow Shaft Thru Hole (up to 4.75” diameter) for space saving options
• Very compact with high torsional rigidity
• Integrated Angular bearings for large thrust & overhung moment capacity
• High Ratio availability (up to 258:1) without increasing gearbox size
• Torque capacity up to 5X rated torque (E-Stop)

Nabtesco is the largest precision Cycloidal gearbox manufacturer in the world and leads the precision gear industry by providing High Performance Reduction Gears, Hollow Shaft Gear Heads and Single Axis Servo-Actuators and Controllers.

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