SteadyWin WK3506 Outrunner Frameless Motor — Brushless DC Robot Motor for Industrial Robotic Arms & Exoskeletons

Overview

SteadyWin WK3506 Outrunner Frameless Motor is a brushless DC outrunner frameless motor designed for precision mechatronic assemblies. This compact Robot Motor family (WK3506 and WK3506CH) targets integration in robotic arms, exoskeletons, humanoid and legged robots where low inertia, defined torque ranges, and compact form factor are required.

Key Features

• Frameless outrunner construction for direct integration into custom drivetrain and gearbox assemblies.
• Two torque variants: 0.09 N.M (WK3506) and 0.05 N.M (WK3506CH) for adaptable load requirements.
• Compact size with high power density: small diameter and low rotor inertia for fast dynamic response.
• Nominal voltage 12V with a wide working temperature range (-20~80℃) and high demagnetization tolerance (120℃).
• Available 2D installation drawings and 3D model files for mechanical integration and CAD validation.

Applications

• Humanoid robots
• Robotic arms and industrial manipulators
• Exoskeletons
• Quadruped and legged robots
• Automated guided vehicles (AGV)
• Autonomous robotic units (ARU)

For customer service and technical inquiries, contact support@rcdrone.top or visit https://rcdrone.top/ for assistance with ordering, CAD models, or integration guidance.

Specifications

Parameter                                 | Value (WK3506)    | Value (WK3506CH)
------------------------------------------|-------------------|-------------------
Nominal voltage                           | 12V               | 12V
Nominal current                           | 1.1A              | 1.1A
Nominal torque                            | 0.09N.M           | 0.05N.M
Nominal speed                             | 467rpm            | 467rpm
Max speed                                 | 1610rpm           | 1610rpm
Stall torque                              | 0.15 N.M          | 0.08N.M
Stall current                             | 1.9A              | 1.9A
Winding turns of motor                    | 40T               | 40T
Interphase resistance                     | 6.56Ω             | 6.56Ω
Interphase inductance                     | 1.27Mh            | 1.27Mh
Speed constant                            | 134rpm/v          | 134rpm/v
Torque constant                           | 0.08N.M/A         | 0.04N.M/A
Rotor inertia                             | 51gcm^2           | 20gcm^2
Number of pole pairs                      | 11Pairs           | 11Pairs
Working temperature                       | -20~80℃           | -20~80℃
Max demagnetize temperature               | 120℃              | 120℃
Inner diameter of the stator              | 22mm              | 22mm
Motor size                                | Ø40*9.5mm         | Ø38.4*9mm
Motor weight                              | 32g               | 24g

Manuals

• WK3506_installation_drawing.pdf
• WK3506CH_installation_drawing.pdf
• SteadyWin_WK3506_motor.stp
• SteadyWin_WK3506CH_motor.stp