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R911273363 (MHD071B-035-PG1-UN)

MHD Synchronous Motors

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1 Year Warranty Included
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1 Year Warranty Included
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The Bosch Rexroth R911273363 (MHD071B-035-PG1-UN) is a permanent magnet servo motor engineered with electronic commutation and specialized magnet materials, resulting in low inertia mass. It is configured with liquid cooling and a closed housing for operation in demanding environments. The motor includes a holding brake rated at 5.0 Nm and provides a continuous standstill torque of 8.0 Nm. It features digital servo feedback with an integrated encoder supporting absolute position detection beyond 4096 revolutions, plain shaft with shaft seal, 23 mH winding inductivity, 4 pole pairs, rated speed of 2500 RPM, and insulation category F. The centering diameter is 95 mm and the motor length is type B with installation specified at 1000 MSL.

Technical Specifications

Product Type
Motor

Motor Type
Permanent Magnet Motor

Feature
Electronic Commutation

Function
Main Drive Motor

Suitable For
Machine Tools

Type of Device
Intelligent Device

Functionality
Versatile Operation

Temperature Settings
Overheat Protection

Housing Type
Closed Housing

Why is the 8.0 Nm standstill torque significant for motion control?

It enables the motor to hold load positions securely without continuous motion. This is especially valuable in applications requiring precise holding under load, like CNC or robotic arms.

How does the integrated brake on the MHD071B-035-PG1-UN enhance safety?

The built-in 5.0 Nm holding brake prevents shaft rotation during power-off conditions. This ensures safe positioning for vertical loads or emergency stops.

Is the plain shaft design compatible with keyed couplings?

No, plain shafts require clamp or friction-fit couplings rather than keyed ones. This allows backlash-free torque transmission but needs precise alignment.

How does absolute position detection over 4096 revolutions benefit machine setup?

It eliminates the need for homing cycles after power loss or restart. This reduces downtime and simplifies system initialization in automation processes.

Does the MHD071B-035-PG1-UN require a specific mounting orientation due to its cooling system?

Yes, optimal cooling performance may depend on correct orientation and coolant flow direction. Installers must ensure proper integration with the machine’s liquid cooling loop.

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Internal Product Review

The MHD071B‑035‑PG1‑UN is a servo motor from Bosch Rexroth Indramat’s MHD series. It features a holding brake rated at 5.0 Nm, liquid cooling, digital servo feedback with an integrated encoder. Its enclosure is a fully sealed, closed housing that protects internal components from dust and moisture and is consistent with the IP65 class specification.

Warranty

1-year-warranty
Indramat USA 1 Year Warranty

Repair

product repair We offer a repair service for the MHD071B-035-PG1-UN.
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