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MST291D-0010-FT-N0CN-D303 Bosch Rexroth Indramat

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The Bosch Rexroth Indramat MST291D-0010-FT-N0CN-D303 is part of the MST Synchronous Torque Motors series. It has a rated power of 6.45 kW, rated current of 16.0 A, and a rated torque of 440 Nm. The motor features an open cooling jacket, a maximum torque of 1000 Nm, and a power dissipation of 3.60 kW.

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Product Description:

The MST291D-0010-FT-N0CN-D303 is a low-speed synchronous torque motor manufactured by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. Designed as a direct-drive component, the unit generates high stall torque at minimal rotational speed, allowing gearboxes to be eliminated while maintaining precise position control. In industrial automation, it drives rotary tables, extruders, and forming presses where constant torque over extended duty cycles is essential. Its direct-drive layout also helps reduce backlash and removes wear points associated with intermediate mechanical transmission components.

At its continuous operating point, the motor delivers 440 Nm at a shaft speed of 140 rpm, producing 6.45 kW of mechanical output while drawing 16.0 A. The magnetic circuit converts stator current to torque with a constant of 27.50 Nm/A, which supports predictable load response in closed-loop control. A voltage constant of 1.632 V per rpm indicates the back EMF returned to the inverter at rated speed, and the 5.6 Ω winding resistance contributes to ohmic losses. Leakage capacitance is 12.4 nF and should be considered when evaluating common-mode currents in the drive system. The motor uses an open cooling jacket, so process water circulates around the stator housing to remove heat before it reaches the laminations. This arrangement supports continuous torque production without relying on external airflow across the motor frame.

For short-term overloads, the shaft can transmit up to 1000 Nm, supported by a peak phase current of 44.0 A. Electrical speed is limited to 250 rpm to keep induced voltage within drive ratings. A winding inductance of 51.0 mH smooths current ripple, which helps the current loop remain stable during rapid torque changes. The motor’s internal losses reach 3.60 kW, and that heat must be removed by the cooling circuit during operation. The jacket holds 0.23 L of coolant, and a pressure drop of 0.6 bar at minimum flow indicates the pump head needed in the water circuit. These values are relevant when selecting piping layout and pump capacity for the installation.

Coolant Duct Volume
0.23 L
Cooling Jacket
Open
Leakage Capacitance
12.4 nF
Max Speed (electrical)
250 min^-1
Maximum Current
44.0 A
Maximum Torque
1000 Nm
Power Dissipation
3.60 kW
Pressure Drop At Qmin
0.6 bar
Rated Current
16.0 A
Rated Power
6.45 kW
Rated Speed
140 min^-1
Rated Torque
440 Nm
Torque Constant (20 °c)
27.50 Nm/A
Voltage Constant (20 °c)
1.632 V/min^-1
Winding Inductivity
51.0 mH
Winding Resistance (20 °c)
5.6 Ohm
  • MST291D0010FTN0CND303
  • MST291D 0010 FT N0CN D303
  • mst291d-0010-ft-n0cn-d303

Frequently Asked Questions about MST291D-0010-FT-N0CN-D303:

Q: What is the rated current of the MST291D-0010-FT-N0CN-D303 torque motor?

A: The MST291D-0010-FT-N0CN-D303 has a rated current of 16.0 A for continuous operation.

Q: What type of cooling jacket does the MST291D-0010-FT-N0CN-D303 use?

A: The open cooling jacket design facilitates efficient heat dissipation in this torque motor.

Q: What is the maximum torque the MST291D-0010-FT-N0CN-D303 can provide?

A: This model delivers a maximum torque output of 1000 Nm for demanding industrial applications.

Q: How much power does the MST291D-0010-FT-N0CN-D303 dissipate under maximum load?

A: The power dissipation of this torque motor is rated at 3.60 kW.

Q: What is the winding inductivity of the MST291D-0010-FT-N0CN-D303 at 20°C?

A: At 20°C, the winding inductivity of this motor is specified at 51.0 mH.


Internal Product Review

  • ‘‘The MST291D-0010-FT-N0CN-D303 is a Bosch Rexroth synchronous torque motor with an open cooling jacket and a rated torque of 440 Nm. Rated power of 6.45 kW and maximum torque of 1000 Nm give the unit strong low-speed drive capability for high-load rotary applications. Excellent torque density and a 27.50 Nm/A torque constant make the motor a very capable direct-drive choice.’’

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