Bost RT-6000

The Bost RT-6000 is a CNC table-type horizontal boring machine from Bost Machine Tools that blends the flexibility of a rotary table configuration with the heavy-duty structural integrity characteristic of Spanish-built heavy machine tools. Unlike the floor-type FR series, the RT-6000 integrates a precision CNC rotary table as the primary workpiece carrier, enabling four-sided access to parts in a single setup without the complexity of manual repositioning. This makes it particularly effective for box-shaped castings, housings, and structural components that require machined features on multiple orthogonal faces.

The RT-6000's architecture places the workpiece on a robust CNC rotary B-axis table, which indexes and interpolates with the machine's linear axes to provide full 4-axis and optional 5-axis machining capability. The table's load rating accommodates heavy castings and weldments typical in energy, rail, and heavy equipment applications. Precision angular positioning with automatic clamping ensures that each indexed position is held rigidly during the full cutting cycle, preventing the loss of accuracy that can result from table flex under heavy cutting forces.

The spindle assembly on the RT-6000 is sized for medium-to-large horizontal boring mill applications, with a bore diameter that provides the torque capacity needed for drilling, boring, and face milling operations on workpieces in the RT-6000's size class. Quill (W-axis) movement adds reach for accessing deep bores, while the full XYZ linear axis set provides comprehensive tool positioning capability. The spindle drive system uses a geared servo arrangement with selectable speed ranges, covering both low-speed high-torque roughing and higher-speed semi-finishing.

Bost equips the RT-6000 with Siemens SINUMERIK 840D sl as standard, providing the machining cycle library, probing integration, and 5-axis capability expected in a machine at this level. Programming can be performed via conversational ShopMill interface or by importing CAM-generated NC programs. The control's TCPM function enables smooth tool path maintenance during tilted plane and 5-axis simultaneous operations when the machine is configured with a CNC tilt head.

For manufacturers whose parts require high positional accuracy between features on multiple faces — a common requirement in gearboxes, turbomachinery casings, and injection mold bases — the Bost RT-6000 offers a reliable, European-built table-type boring mill with the precision and cutting performance to meet tight drawing tolerances. Its position between entry-level table boring mills and the large floor-type FR series makes it a versatile choice for shops that need to machine medium-to-large parts with consistent, repeatable quality.