KDA 3.3-100-3-APD-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.
MPN: R911274678
The Bosch Rexroth Indramat KDA 3.3-100-3-APD-U1 is a spindle drive from the KDA Spindle Drives series with a rated current of 100 Amps and a DC supply voltage of 300 Volts. It features a mounted heatsink blower for forced cooling and operates within an ambient temperature range of 5 to 45 degrees Celsius. This drive includes additional digital position command interfaces and a second encoder input for spindle or additional motor feedback.
Internal Product Review
The KDA 3.3-100-3-APD-U1 spindle drive delivers excellent performance with a rated current of 100 A and a DC supply voltage of 300 VDC. Its forced cooling system, utilizing a mounted heatsink blower, ensures stable operation within ambient temperatures from 5 to 45 degrees Celsius. This unit stands out for reliable spindle control in demanding industrial environments.
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Product Description:
The KDA 3.3-100-3-APD-U1 spindle drive is manufactured by Bosch Rexroth Indramat for the KDA Spindle Drives series. It is designed to translate controller commands into three-phase power that regulates high-speed machine-tool spindles, allowing precise velocity and torque control in automated milling, drilling, and grinding cells. Model designator “3” identifies the third release within the series, and its internal circuitry is optimized for operation from a common DC bus in multi-axis systems.
The power section accepts a bus voltage of 300 VDC and can deliver a continuous output of 100 A to the connected spindle motor. Thermal stability is maintained through Forced Cooling; this mode drives air across the heat sink so full current is available without derating. The integral blower is supplied from an auxiliary source rated at 115V/50-60Hz, isolating fan load from the main DC path. Speed reference enters the drive as an Analogue command, enabling proportional control from CNC hardware or external regulators while the internal current controllers close the torque loop.
A separate interface accepts a Position command value, digital, allowing higher-level systems to synchronize spindle orientation during tool change or tapping cycles. The unit is specified for ambient conditions between 5 to 45 Degrees Celsius and installation up to 1000M above sea level without additional cooling provisions. A Mounted Heatsink Blower directs airflow rearward, simplifying cabinet layout and ensuring the aluminum fin stack remains below critical temperature. For applications that demand closed-loop speed and positioning, a second encoder input is available so the drive can process spindle feedback or auxiliary motor feedback simultaneously with the primary resolver signal.
