Burkhardt + Weber offers a redesigned boring mill headstock, intended for enhanced accuracy and faster spindle speeds. The thermal-controlled unit fits the company's machine frames to create precision boring machine centers with quill travels ranging to 39.6" (1,000 mm). Spindle sizes are available in diameters of 5" (130 mm) or 6" (160 mm). With 80 hp (60 kW) at 100-percent duty, the symmetrical spindle drive arrangement features direct spindle position measurement via linear scale feedback. The headstock and spindle unit are temperature-controlled with advanced thermal growth compensation and a direct thermal growth measurement system. For optimal spindle travel linearity, the headstock uses an integrated spindle droop compensation system.
The headstock offers close tolerances for spindle position, reducing the number of operator interventions and improving automation capabilities. The company's rack-style automatic toolchanger enables difficult tooling applications for heavy, long or large-diameter tools as heavy as 165 lbs (75 kg). The toolchanger also accommodates the company's special cutting units such as facing and contouring heads.
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