Vented Screws     flanges     seals and gaskets     vacuum components         America     Asia Pacific     EUROPE         DE     FR     UK     ALMA driving elements GmbH - www.alma-driving.de - Obere Heeg 5, 97852 Schollbrunn, Germany email: info@alma-driving.de, Tel. +49 (0)9394 9700-0 ALMA's main business is the design and production of tailor-made components and systems for complex drive requirements that also include ultra-high vacuum engineering. The product range covers high-precision vacuum components like rotary feedthroughs and direct drives e.g. for thin-film technology up to semiconductor, LED/OLED- and solar module production. products:   Vacuum screws ALMA driving elements finishes ordinary screws by subjecting their surfaces to high-grade precision machining and modifying their “aerodynamics”. With the perfection of their properties, they become very special ALMA vacuum screws. The four main production steps in the finishing of a vacuum screw 1. High-precision drilling 2. Milled countersink 3. Superfine Post-Rolling of threads 4. Silver- and gold-plating     www.vacuum-guide.com     Keywords