Electric servo-actuator ACTILINK-JD Circulo 8

rotarywith servo-motordirect-drive

ACTILINK-JD SERIES Lightweight, compact low-reduction rotary actuators engineered for high-dynamics, high-efficiency applications such as humanoid and multi-legged robots, plus modular automation solutions in logistics and manufacturing.

Product data

• Rated Torque: 6 Nm
• Peak Torque: 17 Nm
• Rated Output Power: 170 W
• No-Load Speed: 400 rpm
• Rated Load Speed: 275 rpm
• Weight:
  • 510 g (variant S1-SS)
  • 620 g (variant D2-SS)
  • 640 g (variant D2-SM)
• Reduction Ratio: 7.75:1
• Outer Diameter: 78.5 mm
• Length: 65.5 mm / 73 mm (variants S1-xx / D2-xx)
• Communication: EtherCAT
• Safety: STO (standard), Safe Motion / FSoE (option)
• Electronics details: SOMANET Circulo 7

Features

Dynamics

• High-torque outrunner motor optimized for dynamic response
• High peak torque with strong power-to-weight ratio
• Fast acceleration suitable for agile robotic joints

Planetary Gearbox

• Compact single-stage planetary gearing for efficient power transmission
• Low backdrivability and reduced backlash — quasi direct-drive behavior
• High overall efficiency and cost-effective design

Bearings

• Engineered for simplified mechanical integration
• Supports high bending, radial and axial loads
• Stiff and durable for cyclic loading

Technical specifications

• Rated Torque: 6 Nm
• Peak Torque: 17 Nm
• Rated Output Power: 170 W
• No-Load Speed: 400 rpm
• Rated Load Speed: 275 rpm
• Weight variants: 510 g (S1-SS); 620 g (D2-SS); 640 g (D2-SM)
• Reduction Ratio: 7.75:1
• Outer Diameter: 78.5 mm
• Length: 65.5 mm (S1 variants) / 73 mm (D2 variants)
• Communication: EtherCAT
• Functional safety options: STO; SBC via IO OR Safe Fieldbus, Safe Motion
• Encoder options: Single encoder OR Dual encoder (1× separate on output shaft)