Milling motor with hollow shaft Bornemann 444 Easily retrofits your milling machine to suction milling of foamed plastics including styrofoam and polyurethane. Specially designed for suction milling - ideally suited for joint application with hollow cutters and suction machines 4.4kW, 400V, 200Hz Adjustable speed up to 12,000min-1 (using an external frequency converter) Robust, durable unit Customised adapter boards for installation with your machine can be delivered at short notice