SE-KB4.020.030-00.000

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The SE-KB4.020.030-00.000 is a synchronous servo motor with a nominal speed of 3000 rpm and a peak current of 15 A. Designed by Bosch Rexroth Indramat as part of their SE Synchronous Servo Motors series, it weighs 7 kg. This motor features a torque constant of 0.80 Nm/A and a voltage constant of 85 V per 1000 rpm.

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Product Description:

The SE-KB4.020.030-00.000 is a compact servo motor unit built by Bosch Rexroth Indramat to improve automation operation by serving as a reliable source of kinetic energy while maintaining an impressive energy efficiency. The rotor installed into this motor unit is fitted with special magnets designed to ensure low inertia of the motor even during operation speed as high as 3000 revolutions per minute. For customers that operate in harsh environments, this motor is the perfect choice as it is equipped with housing built according to IP67 according to DIN 40050/40053. The high degree of protection provided by this motor housing makes it possible for the motor to withstand common contaminations like dust and water splash. The output shaft of the SE-KB4.020.030-00.000 motor unit is supported by ball bearings; these bearings have an average service life of about 20,000 hours although this can be significantly reduced by the overloading of the motor.

The winding installed in the SE-KB4.020.030-00.000 industrial motor unit also has a minimum service life of about 70,000 hours. During operation, the maximum shock resistance value of this motor unit is about 6 grams, and the expected noise output is about 58 decibels when measured at a distance of 1 meter from the motor. Each unit of this industrial motor is equipped with a sophisticated thermistor designed to help connected drive controllers keep track of the temperature in the motor housing.

The SE-KB4.020.030-00.000 industrial motor can reach a maximum operation speed of 6000 revolutions per minute> at a maximum input current of 15 amperes. It is also coated to protect it from weathering, yellowing, and deterioration that can be caused by corrosive liquids.

Current At Standstill (io)
2.5 A
Electrical Time Constant (tel)
4.6 ms
Flange Dimensions
185 Ø mm
Mass (m)
7 kg (excluding holding brake)
Maximum Length (l)
204 mm (excluding holding brake)
Mechanical Time Constant (tmech)
19.0 ms
Moment Of Inertia (j)
0.74 kgm² x10⁻³
Nominal Speed (nn)
3000 rpm
Peak Current (imax)
15 A
Shaft Dimensions (d X L)
Ø 19 x 28 mm
Thermal Time Constant (ttherm)
11 min
Torque Constant (kt)
0.80 Nm/A
Voltage Constant (ke)
85 V / 1000 rpm
Winding Inductance (l2ph)
81.0 mH
Winding Resistance (r2ph)
17.30 Ohm

Frequently Asked Questions about SE-KB4.020.030-00.000:

Q: Does the SE-KB4.020.030-00.000 have a broad overload range?

A: Yes. This is due to its favorable heat dissipation and monitoring mechanism.

Q: What is the benefit of the special magnet used in the SE-KB4.020.030-00.000?

A: The rare-earth magnetic material used in this motor unit is responsible for its characteristic smooth operation.

Q: What is the service life of the ball bearing in the SE-KB4.020.030-00.000?

A: Integrated ball bearings in the SE-KB4.020.030-00.000 have a service life of about 20,000 hours under normal operation.

Q: How is the integrated shaft in the SE-KB4.020.030-00.000 designed?

A: The shaft present in the SE-KB4.020.030-00.000 is equipped with a keyway and feather key.

Q: Does the SE-KB4.020.030-00.000 have an holding brake?

A: No. There is no holding brake integrated into the SE-KB4.020.030-00.000 motor unit.


Internal Product Review

  • ‘‘The SE-KB4.020.030-00.000 is one of the most reliable synchronous motor units from Bosch Rexroth. It has a brushless design and maintains low inertial during operation. The nominal operating speed of the motor is about 3000 revolutions per minute. ’’

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