Burkhardt+Weber MFZ 400

The Burkhardt+Weber MFZ 400 is a precision milling and boring machining center in the mid-size segment, combining high-accuracy boring operations with full milling capability for complex prismatic workpieces. The MFZ designation — Milling and Boring Center — reflects the machine's dual identity: it delivers the precision spindle and rigidity of a dedicated boring machine while providing the flexibility of a multi-task machining center capable of face milling, end milling, pocket milling, drilling, and reaming.

The 400 designation refers to the nominal spindle diameter class and the machine's pallet or work zone sizing. The MFZ 400 uses a fixed-gantry or traveling column design with a high-rigidity spindle head capable of accepting boring bars up to 400 mm diameter reach range. This makes it well-suited for workpieces in the medium-weight class — diesel engine blocks, hydraulic manifolds, valve bodies, gearbox housings, and mid-size aerospace structural brackets — where precision bores must be combined with complex milled features in a single setup.

Burkhardt+Weber engineers the MFZ 400 with thermal symmetry as a primary design goal. The column and spindle carrier are designed for minimal thermal growth in production environments where temperature fluctuates between shifts. Integrated thermal compensation in the Siemens Sinumerik 840D sl control adjusts axis positions in real time based on sensor data from key structural points, maintaining bore positional accuracy within a few microns across full production shifts. The spindle uses a high-rigidity design with a large-diameter front bearing arrangement for minimal radial deflection under heavy boring cuts.

The MFZ 400 is typically configured with a rotary pallet table for four-sided complete machining and an automatic tool changer with 60–120 tool positions, enabling unattended machining of complex multi-face prismatic workpieces. Optional right-angle milling heads, extended reach boring heads, and probing systems for in-process measurement are available through the automatic head changer interface. This configurability makes the MFZ 400 a strong candidate for flexible manufacturing cells where one machine must handle a variety of part types across short production runs.

The MFZ 400 competes with the Parpas ML 35, TOS Varnsdorf WRF 130, and Juaristi JXR mid-size boring mill segment. Burkhardt+Weber positions the MFZ 400 as the precision choice for buyers who need tighter standard tolerances and better thermal compensation than the entry-level European boring mills provide, without stepping up to the full scale and cost of a floor-type large boring mill. It is a common choice for precision subcontractors serving the German automotive and Tier 1 aerospace supply chain.