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MHD115B-058-PG1-LA Bosch Rexroth Indramat

MPN: R911290112

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The Bosch Rexroth Indramat MHD115B-058-PG1-LA is a servo motor from the MHD Synchronous Motors series, featuring a 192 mm flange and a centering diameter of 180 mm. It has a continuous torque at standstill of 50 Nm and includes a holding brake with 70 Nm torque. This motor is equipped with digital servo feedback with an integrated encoder and uses natural convection cooling.

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Product Description:

The MHD115B-058-PG1-LA is a servo motor produced by Bosch Rexroth Indramat and supplied within the MHD Synchronous Motors series. Designed for integration with digital drive controllers, it converts drive current into precise rotational motion for indexing tables, gantry axes, and automated assembly stations. Its permanent-magnet construction and closed-loop feedback allow repeatable positioning under changing load conditions, so the motor can support accurate speed control, stable axis response, and consistent motion during repeated production cycles. In automated equipment, it serves as the actuator that moves mechanical tooling whenever the control system commands a specific speed or angular position.

The motor delivers a continuous standstill torque of 50.0 Nm, giving it the capacity to hold stationary loads without mechanical drift during closed-loop clamping or pressing phases. For rapid stopping and power-off retention, the integrated holding brake supplies up to 70.0 Nm of static torque. Installation is centered by a 180 mm pilot and secured to a square flange that spans 192 mm, so the housing aligns accurately with common machine mounting surfaces. Internal losses are dissipated through natural convection, and the ribbed housing transfers heat to the surrounding air without requiring an auxiliary fan. This cooling method helps keep the motor layout simple in machines where external airflow hardware is not desired.

Feedback accuracy comes from a digital servo encoder that provides absolute position information over more than 4096 revolutions, eliminating the need for homing after power cycles. The frame uses size 115 and winding code 058, so the matched drive can apply the proper electrical values for commutation and current control. Power enters through a power connector that points to the left side of the stator housing, which helps simplify cable routing in multi-axis assemblies. A plain shaft with a radial shaft seal is supplied, and the B-length housing balances inertia with the installation space available inside the machine.

Ambient Storage Temperature Range
-20 to +80 °C
Centering diameter
180 mm
Continuous Torque at Standstill
50.0 Nm
Degree of protection
IP65
Encoder Type
Digital servo feedback w/ integrated encoder
Flange size
192 mm
Holding Brake
With holding brake
Holding Brake Torque
70.0 Nm
Housing Cooling Type
Natural convection
Insulation Class
F
Maximum setup height
1000 above MSL
Measurement method
Optically
Motor Length
B
Motor Size
115
Operating Ambient Temperature Range
0 to 40 °C
Power Connection Direction
to the left
Power Connection Type
Power Connector
Product Type
Servo Motor
Shaft Design
Plain shaft
Shaft Seal
Yes
System accuracy
± 0.5 angular minutes
Type of Position Detection
Absolute (>4096 revolutions)
Winding Code
058
  • MHD115B058PG1LA
  • MHD115B 058 PG1 LA
  • mhd115b-058-pg1-la

Frequently Asked Questions about MHD115B-058-PG1-LA:

Q: What type of encoder is used in the MHD115B-058-PG1-LA servo motor?

A: The MHD115B-058-PG1-LA uses digital servo feedback with an integrated encoder for position monitoring.

Q: What is the continuous torque at standstill of the MHD115B-058-PG1-LA?

A: This servo motor produces a continuous torque of 50.0 Nm at standstill.

Q: Does the MHD115B-058-PG1-LA have a holding brake, and what is its torque?

A: The MHD115B-058-PG1-LA includes a holding brake with a torque rating of 70.0 Nm.

Q: How is the MHD115B-058-PG1-LA motor cooled?

A: Natural convection is used for cooling the housing of this model.

Q: What type of shaft and seal does the MHD115B-058-PG1-LA servo motor have?

A: This servo motor features a plain shaft design with a shaft seal for added protection.


Internal Product Review

  • ‘‘The MHD115B-058-PG1-LA is a servo motor from the Bosch Rexroth Indramat MHD Synchronous Motors series, featuring 50.0 Nm continuous torque at standstill and a plain shaft with shaft seal for secure, leak-resistant operation. With digital servo feedback and absolute position detection exceeding 4096 revolutions, this motor delivers precise and reliable motion control. The integrated holding brake rated at 70.0 Nm further enhances operational safety and positioning stability.’’

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