M-805-A-31-B3

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The M-805-A-31-B3 servo motor is manufactured by Kollmorgen. As part of the M Goldline Servo Motors series, it delivers a rated power of 10.8 kW with a speed of 1500 RPM. This motor provides a continuous torque of 83.4 N-m at 25°C. It features a peak torque of 232.0 N-m and a rotor inertia of 0.00840 kg-m².

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Product Description:

The Kollmorgen M-805-A-31-B3 servo motor is built for heavy-duty applications, providing exceptional torque and power. As the highest-rated member of the M Goldline Servo Motors series, this model combines outstanding strength, precision, and durability to support continuous-duty industrial cycles. The motor generates a powerful rated output of 10.8 kW to operate various substantial mechanical systems reliably. The motor maintains a speed of 1500 RPM as the top operating point to balance precise speed control with overall power output. This device delivers reliable continuous torque of 83.4 N-m at 25°C or 78.6 N-m at 40°C which makes it suitable for heat-sensitive conditions and extended operational times.

This model reaches its highest torque potential of 232.0 N-m at peak times to provide the motor system with brief load handling capabilities without affecting its structural stability. The system achieves motion control stability using its rotor inertia value of 0.00840 kg-m² and it maintains high responsiveness when accelerating or decelerating. Precise force management becomes possible through the accurate conversion between current and torque that is enabled by the torque sensitivity of 2.25 N-m/Amp RMS. The servo motor delivers operational control and force requirements for heavy-duty automation across packaging lines and printing presses as well as robotics and conveyor systems.

The M-805-A-31-B3 servo motor which belongs to the M Goldline series focuses on thermal efficiency and mechanical reliability just like its siblings. The system achieves continuous use operation efficiency with stable performance throughout changing temperature conditions. The Kollmorgen M-805-A-31-B3 provides trustworthy performance for applications that involve motion system design and drive system updates. The technological features of high torque along with precise motion control and reliable performance under stress pressure make this device the first choice among automation engineers and OEMs who want to improve their productivity and reliability.

Back Emf (line-to-line)
136.0 VRMS / kRPM
Continuous Line Current
35.0 Amps RMS
Continuous Torque At 25°c
83.4 N-m (61.5 lb-ft)
Continuous Torque At 40°c
78.6 N-m (58.0 lb-ft)
Dc Resistance At 25°c (line-to-line)
0.230 Ohms
Inductance (line-to-line)
13.0 mH
Max Line-to-line Volts
250 Volts RMS
Maximum Operating Speed
1500 RPM
Peak Line Current
109 Amps RMS
Peak Torque
232.0 N-m (171.0 lb-ft)
Rated Horsepower (hp)
14.5 HP
Rated Power (kw)
10.8 kW
Rotor Inertia
0.00620 lb-ft-sec² (0.00840 kg-m²)
Speed At Rated Power
1500 RPM
Torque Sensitivity
2.25 N-m / Amp RMS (1.66 lb-ft / Amp RMS)

Frequently Asked Questions about M-805-A-31-B3:

Q: What is the rated power of the M-805-A-31-B3 servo motor?

A: This motor provides a rated power output of 10.8 kW.

Q: What is its continuous torque at 25°C?

A: It delivers a continuous torque of 83.4 N-m at 25°C.

Q: What is the motor’s peak torque capability?

A: The peak torque is 232.0 N-m.

Q: What is the rotor inertia of this servo motor?

A: The rotor inertia is measured at 0.00840 kg-m².

Q: What speed does the motor operate at?

A: It runs at a rated speed of 1500 RPM.


Internal Product Review

  • ‘‘The M-805-A-31-B3 is a powerhouse in the servo motor lineup, delivering excellent torque and stability at industrial scale. Its 10.8 kW rated power and 232 N-m peak torque make it ideal for demanding automation systems requiring performance without compromise.’’

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