Innenbohrspindel

An Innenbohrspindel, or internal boring spindle, is a specialized tool used in machining operations, particularly for precision boring and internal milling. It is designed to hold and rotate a cutting tool that operates within the workpiece. Unlike a standard milling spindle which typically holds tools externally, the Innenbohrspindel is integrated into a boring bar or a similar tool holder, allowing for deep and accurate internal machining.

The primary function of an Innenbohrspindel is to provide a stable and precise rotational axis for the cutting tool, ensuring high surface finish and dimensional accuracy of the internal bore. These spindles are often characterized by their rigidity and low vibration, which are crucial for achieving tight tolerances. They can be driven by various means, including electric motors, hydraulic systems, or even integrated into the main spindle of a CNC machine.

Innenbohrspindeln are commonly found in applications such as the machining of engine blocks, cylinders, hydraulic components, and other parts requiring precise internal diameters. Their design often incorporates features for coolant delivery directly to the cutting edge, which helps in chip evacuation and tool cooling, further enhancing machining efficiency and tool life. The precision and specialized nature of the Innenbohrspindel make it an essential component in high-precision manufacturing environments.