MSS312H-0085-FA-N0CN-NNNN Bosch Rexroth Indramat
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MPN: R911321211
The Bosch Rexroth Indramat MSS312H-0085-FA-N0CN-NNNN is part of the MSS Synchronous IndraDyn H Motors series and features an open kit motor design with IP00 protection. It uses a connection cable for electrical connection and requires a coolant flow of 8.7 liters per minute, with a maximum coolant supply pressure of 6 bar. The motor is equipped with a KTY84-130 external temperature sensor and includes both axial and radial coolant threads.
Internal Product Review
The MSS312H-0085-FA-N0CN-NNNN is an MSS IndraDyn H synchronous motor in an open kit motor design with a connection cable electrical interface. For liquid-cooled installations, the 8.7 l/min required coolant flow and 6 bar maximum coolant supply pressure support stable thermal management, making this motor a strong fit for high-performance machine builds.
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Product Description:
The MSS312H-0085-FA-N0CN-NNNN is a liquid-cooled kit motor section produced by Bosch Rexroth Indramat for the MSS Synchronous IndraDyn H Motors series. As a frameless stator and rotor assembly, it is intended to be mounted directly in the customer’s mechanical envelope so that moving axes carry only the active magnetic parts. This arrangement delivers high torque density for gantries, spindles, and indexing tables that require precise servo control without the additional inertia of a fully enclosed motor.
Cooling and electrical parameters dominate the installation requirements of this unit. The motor is supplied with an open design, so enclosure sealing must be provided by the machine builder. Power conductors are routed through a connection cable with a strand diameter of 30 mm, and each phase demands a cross-section of 2 × 25.0 mm² to keep copper losses within limits. Temperature monitoring relies on a KTY84-130 sensor embedded in the winding. The assembly carries a protection rating of IP00, meaning there is no intrinsic barrier against ingress, so reliable operation depends on the host housing. Liquid circulation may enter the stator at a maximum pressure of 6 bar, and after passing the internal channels the allowable pressure drop is limited to 0.5 bar. These hydraulic limits set the pump and hose sizing for closed-loop cooling circuits.
Threaded ports simplify the feed and return lines. On the axial face, coolant attaches through a fixing thread of M30 × 1.5 and a service interface of G 1/2; a separate radial port uses a G 1/4 thread for alternative hose routing. To sustain thermal equilibrium, the system must deliver a flow of 8.7 l/min, which keeps winding temperature within class limits when the motor operates at peak current. The frameless construction allows the active parts to be integrated directly into rotary stages without a separate motor housing.
