KB404XXX Sanyo Denki
Wake Industrial LLC is not an authorized distributor of this product.
The Sanyo Denki KB404XXX is a servo motor from the K SANMOTION Servo Motors series with a rated output of 40 Watts and a rated speed of 3000 min-1. It features a flange size of 42 mm square and weighs 0.40 kilograms. The motor has a continuous stall torque of 0.14 Nm and a peak stall torque of 0.76 Nm.
Internal Product Review
The KB404XXX is a Sanyo Denki K SANMOTION servo motor with a 40 W rated output and 3000 min-1 rated speed. A rated torque of 0.13 N·m paired with 0.76 N·m peak stall torque gives the unit crisp acceleration and dependable overload handling. Strong torque density makes KB404XXX an excellent fit for precise motion applications.
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Product Description:
The KB404XXX is a brushless servo motor produced by Sanyo Denki within the K SANMOTION Servo Motors series. This model supplies closed-loop rotary motion for pick-and-place heads, miniature conveyors, or indexing tables where limited space and low moment of inertia are important. Its 42 mm square flange allows direct mounting to compact gearboxes or brackets, enabling high-precision actuation in small automation cells without additional couplings or belt drives.
The motor delivers a continuous mechanical output of 40 W at a rated shaft speed of 3000 rpm. Under these operating conditions, it produces a rated torque of 0.13 N·m while drawing 2.7 A from a nominal bus voltage of 24 V. A power rate of 2.0 kW/s indicates how quickly the motor can accelerate its load. The 0.7 mH armature inductance and 1.7 Ω phase resistance govern current dynamics for the drive controller. With a mass of 0.40 kg, the unit imposes minimal static load on linear slides or cantilevered fixtures. These characteristics permit rapid start-and-stop cycles while helping the drive maintain controlled motor operation.
For holding or step-load events, the motor can sustain a continuous stall torque of 0.14 N·m and withstand a peak stall torque of 0.76 N·m without demagnetization. A torque constant of 0.057 N·m/A links controller current commands directly to output torque, supporting predictable response as the commanded current changes. The small rotor inertia of 0.084 × 10⁻⁴ kg·m² reduces resistance to acceleration and helps limit overshoot during position corrections. The voltage constant is 6.0 × 10⁻³ V/rpm, indicating the back electromotive force produced as rotational speed increases. The drive must account for this generated voltage during high-speed operation and frequent deceleration. The motor’s electrical characteristics also affect current-loop tuning and the drive’s response to rapidly changing torque commands.
