Bost FX Series

The Bost FX Series is a line of floor-type CNC boring and milling machines produced by Bost Machine Tools, a Spanish precision machine tool builder based in Bergara in the Basque Country. Bost specializes in large-format floor boring machines — a category where Spanish builders have a strong international reputation — and the FX Series represents their heavy-duty CNC floor boring platform for aerospace structural machining, large die and mold production, and heavy industrial component manufacturing.

Floor boring machines occupy a distinct category from horizontal machining centers: rather than a palletized workpiece system, floor boring machines operate on large floor-mounted workpieces or substantial fixtures bolted directly to the machine's work floor or table. The FX Series uses a 110 mm diameter boring spindle on a vertical column that traverses in X along a cross-rail, with the spindle head moving in Y (vertical) and the ram extending in Z (quill out). This configuration allows the machine to reach into large workpieces — turbine housings, press frames, large valve bodies, ship propulsion components — that could never be palletized or mounted on a standard machining center table.

With a 110 mm spindle diameter, the FX Series falls into the heavy-duty boring category, capable of mounting large boring bars, facing heads, and milling cutters suited to the deep bores and large-face-milling operations typical in energy, heavy machinery, and aerospace tooling applications. The floor-type configuration with integrated rotary table allows large, heavy workpieces to be rotated for multi-face access without repositioning on the floor.

Bost's position within the Basque machine tool ecosystem — sharing regional expertise with Soraluce, Zayer, and other Spanish large-format builders — gives the FX Series access to deep application knowledge in floor boring for aerospace and heavy industry. Bost machines are exported globally, with installations in European aerospace facilities, North American energy sector plants, and large tooling and die shops.