R911284191 (MHD112A-058-NG1-LN)
MHD Synchronous Motors
Technical Specifications
Weight
23kg
Insulation Class
F
Enclosure
IP65
Installation Height
1000 MSL
Ambient Temperature
0 to 40 degree Celsius
Peak Current
77 A
Winding Inductivity
7.8 mH
Pole Pairs
4
Torque Constant
0.98 Nm/A
Voltage Constant
89 V/1000 min
Winding Resistance
0.86 Ohm
Maximum Torque
54 Nm
Moment of Inertia
111.0 x 10-4 kgm2
Brakes
Electronically Released Holding Brakes.
Frequently Asked Questions
Can the MHD112A-058-NG1-LN operate efficiently in vertical-axis applications?
Yes, its 22 Nm holding brake maintains load position during power-off, ideal for lifting or pressing tasks. This prevents unwanted movement and protects mechanical systems in vertical configurations.
How does the plain shaft with a shaft seal affect mechanical integration?
It allows direct coupling to gearboxes or pulleys while preventing lubricant or dust ingress. This design supports reliable operation in enclosed or moderately contaminated environments.
What is the practical effect of a 15 Nm continuous torque rating at standstill?
It means the motor can sustain significant load-holding or low-speed torque without overheating. This characteristic benefits processes like indexing tables or forming operations requiring constant torque.
Why is relative position detection suitable for short-cycle applications?
Relative encoders restart quickly without referencing, reducing cycle startup times. However, they may require re-homing after power loss, which is acceptable in frequent-stop environments.
What maintenance factor should be considered for liquid-cooled servo motors like the MHD112A-058-NG1-LN?
Coolant flow must remain unobstructed to prevent thermal buildup and efficiency loss. Regular inspection of cooling lines and seals minimizes downtime and leakage risks.
Common Misspellings
MHD112A058NG1LN
MHD112A 058 NG1 LN
mhd112a-058-ng1-ln
Internal Product Review
The MHD112A-058-NG1-LN servo motor from Bosch Rexroth Indramat combines a 22.0 Nm holding brake, liquid-cooling housing, and a digital HSF encoder. It delivers 15.0 Nm continuous torque at standstill, has a 192 mm flange and plain‐shaft design. In machine tools, packaging lines, and automation systems this servo excels.
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