Bost FR-7000

The Bost FR-7000 is a CNC floor-type horizontal boring mill developed by Bost Machine Tools, Spain's leading manufacturer of large-bore machining centers. The floor-type (or plano-type) configuration of the FR-7000 is specifically designed for very large workpieces that cannot be placed on a rotary table — instead, the workpiece is fixtured directly on the shop floor or on T-slot floor plates, while the machine's column and headstock traverse the full set of axes to access the part. This architecture makes the FR-7000 particularly suited for turbine casings, ship propulsion components, large compressor housings, and construction machinery structural parts.

Bost's engineering philosophy for the FR series emphasizes structural rigidity above all else. The FR-7000 column is a massive steel-welded or cast iron structure that rides on precision hardened guideways embedded in the machine bed. The headstock travels vertically on the column face with minimal stick-slip, thanks to hydrostatic or linear roller guideway systems depending on configuration. The floor plate system, which can extend over many linear meters, allows fixtures to be arranged for sequential machining of multiple parts or for repositioning large single workpieces between operations.

The spindle system in the FR-7000 is engineered for both precision and power, with a bore diameter appropriate for the mid-to-large floor boring mill class. A two-speed gearbox combined with a high-torque servo spindle motor delivers cutting performance from low-speed high-torque heavy roughing through to higher-speed finishing. The spindle nose accepts standard ISO 50 tooling as well as Bost-compatible facing heads and boring bars for large-diameter operations. An integrated quill (W-axis) provides additional axial reach into deep bores without moving the column.

Control is provided via Siemens SINUMERIK 840D sl, the natural choice for machines of this complexity and size. The control manages all linear and rotary axes, spindle functions, automatic tool changer operation, and integrated probing routines. Bost's in-house software integration adds machine-specific cycles for boring, threading, and facing operations, simplifying programming for common heavy boring tasks. Remote diagnostics and connectivity to factory MES systems are standard features in modern FR-7000 installations.

The FR-7000 represents Bost's entry point into the large floor-type boring mill market — a segment where European manufacturers like Bost, TOS, and Juaristi compete on precision, structural quality, and long-term service support. For manufacturers who regularly machine parts too large for table-type machines, the FR-7000 delivers the floor-level access, multi-meter axis travels, and heavy cutting capacity needed to handle exceptional workpiece sizes with consistent geometric accuracy.