R911307899 (MHD112D-027-PG0-LN)

Name: R911307899 (MHD112D-027-PG0-LN)
Brand: Indramat Motors
SKU: MHD112D-027-PG0-LN
Price: 160.00 USD
Availability: InStock

MHD Synchronous Motors

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The MHD112D synchronous servo motor, Bosch Rexroth MPN: R911307899 (MHD112D-027-PG0-LN), is designed for precision automation tasks. This unit weighs 56 kg and incorporates a plain shaft with a sealing ring for lubricant retention. It operates with a voltage constant of 154.5 V/1000min-1 and a torque constant of 1.7 Nm/A at 20°C. The motor achieves continuous torque output of 48 Nm (natural cooling, ΔT=60 K) and withstands continuous currents up to 31.6 A. Peak torque output is 187 Nm at up to 3000 RPM. The motor features left-side power connection via connector, encoder for absolute position detection (digital, multiturn, >4096 revolutions), center diameter 130 mm, flange size 192 mm, and insulation class F. Protection is rated IP68 and the housing, finished in a maximum 40 μm black paint, supports both natural and surface cooling. There is no holding brake and liquid cooling is implemented.

Technical Specifications

Voltage Constant
154.5 V/1000min-1

Torque Constant
1.7 Nm/A at 20°C

Power Connection
Left Side

Output Shaft
Plain with Sealing Ring

Continuous Torque (Natural Cooling)
48Nm at 60 K

Continuous Current
31.6 A at 60 K

Weight
56 kg

Winding Resistance
0.35 Ohms

Winding Inductivity
5.65 mH

Max Speed
3000 RPM

Max Torque
187 Nm

Protection Class
IP68

Insulation Class
F

Rated Current (Surface Cooling)
27.6 A

Rated Torque (Surface Cooling)
59.2 Nm

Thermal Time Constant
40 or 90 depending on Cooling Method.

Frequently Asked Questions

How does the rated torque influence operation?

The rated torque of 48 Nm defines its steady-state load handling capability. The specification ensures consistent torque delivery under continuous industrial motion cycles.

What role does the voltage constant play here?

The voltage constant of 154.5 V/1000 min⁻¹ determines generated back EMF per speed unit. The value ensures compatible synchronization with standard servo drive systems.

How does the motor’s inductivity affect control response?

The winding inductivity of 5.65 mH filters current changes within drive circuits. The controlled inductance enhances motion smoothness while limiting electrical noise during acceleration.

Why is the torque constant significant for precision?

The torque constant of 1.7 Nm/A defines torque generation per ampere. The linear ratio allows predictable current control for position and speed accuracy.

How does thermal behavior impact continuous operation?

The thermal time constant of 90 minutes controls heat buildup during long duty cycles. The predictable heat curve supports safe operation within rated thermal limits.

Common Misspellings

MHD112D027PG0LN

MHD112D 027 PG0 LN

mhd112d-027-pg0-ln

Internal Product Review

The Bosch Rexroth Indramat MHD112D-027-PG0-LN Servo Motor incorporates a plain shaft with an integrated shaft seal for secure motion transfer and long-term durability. Equipped with digital servo feedback for accurate positioning, it supports liquid cooling for consistent operation. It is ideal for robotics, automated production lines, and multi-axis motion systems.