KDA 3.1-150-3-AY0-U1 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat KDA 3.1-150-3-AY0-U1 is a spindle drive from the KDA Spindle Drives series, offering a rated current of 150 Amps and operating at a DC supply voltage of 300 VDC. It features a mounted heatsink blower with forced cooling and can be used in ambient temperatures ranging from 5 to 45 degrees Celsius. The drive supports analog speed command input and includes a second encoder input for synchronous operation.
Internal Product Review
The KDA 3.1-150-3-AY0-U1 spindle drive from Bosch Rexroth Indramat delivers high performance, featuring a rated current of 150 A and a 300 VDC supply voltage. Its forced cooling system with a mounted heatsink blower ensures reliable operation within an ambient temperature range of 5 to 45 degrees Celsius. This model stands out for consistent drive control in demanding spindle applications.
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Product Description:
The KDA 3.1-150-3-AY0-U1 belongs to the KDA Spindle Drives series produced by Bosch Rexroth Indramat. As a spindle drive, it regulates machine tool spindle speed so cutting processes can follow programmed feed rates and surface finish targets during machining. The unit operates on a shared DC bus with other cabinet drives, and its blower-assisted cooling arrangement helps keep the power section at a stable operating temperature during continuous duty. Because spindle speed directly affects chip load and surface quality, stable control helps the machine maintain repeatable cutting results across changing operating points.
The drive links to a common DC link stabilized at 300 VDC, and it can supply up to 150 A of armature current to the connected spindle motor. Its dedicated blower is powered by an auxiliary source rated at 115 V/50–60 Hz, which keeps the cooling supply separate from bus variations during load changes. Thermal management uses forced cooling with a mounted heatsink blower, allowing the drive to maintain full current output without thermal cutback. The spindle speed reference enters the control section as an analog voltage, which supports straightforward connection to compatible CNC controllers. This interface style is useful in systems that use conventional analog command channels rather than newer digital networks.
Reliable operation is maintained in ambient temperatures from 5 to 45 °C, and the unit can be used at elevations up to 1000 m above sea level without additional cooling capacity. The control section also includes a second encoder input and a synchronous input, giving the CNC access to an additional measuring channel for spindle orientation or synchronized motion. It can also support applications in which spindle motion must stay aligned with another axis or measuring system. This added input path supports coordinated positioning as well as standard speed control during machining cycles.
