Product Description:

Bosch Rexroth Indramat manufactures the KDA 2.1-050-3-L00-W1 as part of the KDA Spindle Drives series. In an automation cell, this spindle drive feeds and regulates high-speed machining or grinding spindles, delivering closed-loop power conversion between the plant DC bus and the motor. It is intended for spindle applications that need stable speed and controlled torque while cutting conditions change during operation. By working with the machine controller, the unit supports accurate tool motion and repeatable spindle behavior during demanding production cycles. That is useful in machine tools where spindle response affects surface finish, cycle stability, and repeatability.

The drive operates from a nominal DC bus of 300 V DC and is rated for a continuous output current of 50 A. Thermal management is handled by a mounted heat sink blower, and the fan uses a separate supply of 220 V at 50/60 Hz. This arrangement provides forced cooling by pushing air across the fins instead of relying on natural convection. Keeping the cooling circuit separate from the main power stage helps manage heat during sustained spindle duty. The permissible ambient temperature range is 5 to 45 °C, so the drive can run continuously within that range without added climate control.

Installation is permitted up to 1000 m above sea level without altitude derating. Speed commands are exchanged through the SERCOS interface, which supports coordinated motion timing with other axes in the system. Deterministic data exchange is useful when spindle behavior must stay synchronized with feed axes and programmed motion sequences. The unit has no additional interface option, so communication is limited to the standard connection set provided on the drive. This layout keeps signal routing straightforward while allowing the controller to manage closed-loop spindle operation through the main communication channel.