FEETECH STS3215 7.4V 14.4kg.cm Serial Bus Smart Servo – 1:147 Gear Ratio (C046)

The FEETECH STS3215-C046 is the 1:147 gear-ratio variant of the STS3215 smart servo family. Compared with higher reduction variants, its gearing provides relatively fast movement while retaining substantial torque, making it particularly suitable for robotic joints where speed and responsive movement are important.

At 7.4V, FEETECH specifies a no-load speed of approximately 0.094 sec/60° (106 RPM), 14.4 kg·cm stall torque, and 4.8 kg·cm rated torque. Its supported input voltage range is 5–8.4V.

Key Features

• Model: STS3215-C046
• Gear ratio: 1:147
• Typical operating voltage: 7.4V
• Input voltage range: 5–8.4V
• Stall torque at 7.4V: 14.4 kg·cm
• Rated torque at 7.4V: 4.8 kg·cm
• No-load speed at 7.4V: 0.094 sec/60°
• No-load speed: approximately 106 RPM
• Stall current at 7.4V: 3.3A
• No-load current at 7.4V: 500mA
• Rated current at 7.4V: 1.1A
• Metal gear transmission
• 12-bit high-precision magnetic encoder
• TTL serial bus communication
• Position, speed and other operating feedback
• Supports multiple servos on a shared serial bus
• 360° position control and multi-turn operation capabilities

Applications

The STS3215-C046 is suitable for:

• Robotic arms
• LeRobot SO-ARM101
• Humanoid robots
• Quadruped robots
• Multi-axis robotic mechanisms
• Educational robotics
• Research platforms
• Automated mechanisms
• Smart robotic joints
• Pan/tilt and positioning systems
• DIY robotics projects

The C046 is specifically used in robotics applications such as the SO-ARM101 where its 1:147 gearing and faster output speed are useful.

C046 Variant

Make sure this model is not confused with other STS3215 variants. The C046 uses a 1:147 reduction ratio and is rated for 14.4 kg·cm stall torque at 7.4V. These specifications differ from the 1:191 and 1:345 STS3215 versions.