• Feetech STS3250 Serial Bus Servo, 50 kg·cm 12 V, Full Metal Case, 360° Magnetic Encoder, Upgrade for SO-ARM101 Shoulder Joints
  • Feetech STS3250 Serial Bus Servo, 50 kg·cm 12 V, Full Metal Case, 360° Magnetic Encoder, Upgrade for SO-ARM101 Shoulder Joints
  • Feetech STS3250 Serial Bus Servo, 50 kg·cm 12 V, Full Metal Case, 360° Magnetic Encoder, Upgrade for SO-ARM101 Shoulder Joints
  • Feetech STS3250 Serial Bus Servo, 50 kg·cm 12 V, Full Metal Case, 360° Magnetic Encoder, Upgrade for SO-ARM101 Shoulder Joints
  • Feetech STS3250 Serial Bus Servo, 50 kg·cm 12 V, Full Metal Case, 360° Magnetic Encoder, Upgrade for SO-ARM101 Shoulder Joints
1 5

Glunova Biotech

Feetech STS3250 Serial Bus Servo, 50 kg·cm 12 V, Full Metal Case, 360° Magnetic Encoder, Upgrade for SO-ARM101 Shoulder Joints

Feetech STS3250 Serial Bus Servo, 50 kg·cm 12 V, Full Metal Case, 360° Magnetic Encoder, Upgrade for SO-ARM101 Shoulder Joints

$96.00 SGD
$96.00 SGD
Sale Sold out
Taxes included. Shipping calculated at checkout.
Model

The Feetech STS3250 is a 12 V serial bus servo with 50 kg·cm of torque in a full metal case, using the same protocol, connector and 25 T spline as the STS3215, so it drops into SO-ARM101 shoulder and elbow joints, LeKiwi bases and other LeRobot-compatible robots that need more holding force.

The STS3250 is the metal-case big brother of the STS3215: same bus protocol and cable, 50 kg·cm instead of 30, aluminium body and coreless motor. Builders drop it into the shoulder and elbow of SO-101 arms that carry heavier grippers or cameras, and into LeKiwi bases. Works with the same BusLinker / Waveshare adapters and LeRobot configs.

What can you use it for?

  • Upgrading the shoulder and elbow of an SO-ARM101 that carries a heavier gripper or camera
  • LeKiwi drive wheels and heavier mobile bases
  • Quadrupeds, humanoids and grippers that stall 30 kg·cm servos
  • Any Feetech-bus robot needing 50 kg·cm with position feedback

Who is it for?

Builders who have hit the torque limit of the STS3215 and want a plug-compatible step up without changing controllers or software.

Compatibility

  • Bus: Feetech half-duplex TTL, mixes with STS3215 on the same chain
  • Controllers: BusLinker V3.0, Waveshare Bus Servo Adapter, FE-URT-1
  • Software: LeRobot (feetech), Feetech SDK, Waveshare tool
  • Horns: 25 T spline, same as STS3215; the C001 variant includes a metal bracket
  • Power: 12 V, plan 2–3 A per servo under load

Specifications

Model Feetech STS3250 (ST-3250)
Stall torque 50 kg·cm at 12 V
Speed 75 rpm at 12 V (0.13 s/60°)
Voltage 12 V (6–12.6 V)
Case Full aluminium alloy, dual shaft, 25 T spline
Gears Hardened steel gear train, coreless motor
Encoder 12-bit magnetic, 360°, multi-turn
Interface Feetech half-duplex TTL bus, same protocol as STS3215
Weight 74.5 g
Included Horn, screws, cable; C001 adds a metal mounting bracket

What's in the box

  • STS3250-C002 (servo only): 1 × STS3250 servo, horn, screws, cable, manual
  • STS3250-C001 (with metal bracket): 1 × STS3250 servo with metal U-bracket, horn, screws, cable, manual

Frequently asked questions

Does it fit the SO-ARM101 printed parts?

The STS3250 is larger (about 45 × 24 × 35 mm body plus the metal case) than the STS3215, so the standard SO-101 shoulder parts need a modified pocket; several community remixes exist and our print files include an STS3250 shoulder option.

Same speed as the STS3215?

Faster: 75 rpm at 12 V versus about 45–60 rpm, with 50 kg·cm stall torque.

Do I need new software?

No. It speaks the same Feetech protocol; set its ID and it appears alongside the STS3215 in LeRobot.

View full details