CNC Swiss-TYPE Precision PARTS
Swiss style turning machines are similar to CNC lathes or turning centers, but are faster and more accurate than traditional CNC turning centers. This is because Swiss precision machining allow milling, drilling, turning and tapping to be accomplished on each Swiss turning machine.

CNC Swiss Machining, CNC Turning, CNC Parts
Swiss turning or Swiss screw machining refers to high volume production of miniature high precision cylindrical parts. These Swiss machined part are often call micro pins or micro shaft. (CNC Glossary)

History of Precision Swiss Screw Machining
Swiss-type screw machines manufacturing began in Switzerland to make watch parts; CNC Swiss machines were originally developed specifically to produce collets for watch balance springs. This allowed them to compete with American watch manufacturers by making high precision parts in high volume. Most CNC Swiss screw machines are made in Japan by Star, Citizen, and Tsugami.

Swiss Screw Machining and Services
Unlike many other types of screw machines, Swiss machines generate the features of the part by moving the material and the tool at the same time. Newer Swiss-type screw machines are CNC (Computer Numerical Controlled). Older machines were cam operated, so each different part required a new set of cams. A Swiss-type screw machine is an automatic lathe that has a sliding headstock and a guide bushing. The sliding headstock is the part of the machine that holds the bar stock (usually 12-foot metal or plastic bars) and rotates it (usually 1000-10,000 RPM depending upon the diameter and type of material). The headstock contains the collet, which clamps the material. The material is then fed through a guide bushing, which is usually made of carbide. The bushing is adjusted so that the material can slide through it, but tight enough to keep the material from flexing away from the cutting tool. The guide bushing allows Swiss-type screw machines to hold very tight tolerances. The cutting tools (brazed carbide turning or cut-off tools or insert tools) move in and out of the material to create required diameters while the headstock moves the material forward to create required lengths. Where common turning centers can only manufacture parts of a certain length due to deflection, Swiss Turning centers allow for long parts to be manufactured with ease. Specialized CNC equipment is used to produce turned parts with high-quality finishes that are comparable to ground finishes. CNC Swiss machines can also produce small-diameter parts with high-finish, close-tolerance, bearing surfaces. Today, they are used to manufacture mathematically precise parts for aerospace, defense, and electronics applications. Swiss screw machining services can also produce miniature screws, grommets and bobbins, contact pins for electronics components, and fasteners used in surgical and medical applications. Material capabilities for Swiss screw machining services include aluminum, brass, bronze, copper, nickel, nickel alloys, plastics, precious metals, steel, stainless steel, steel alloys, and titanium.

Swiss Screw Machining Additional Services
Additional services include CAD/CAM support, design assistance, just-in-time (JIT) delivery, rapid prototyping, low-volume production, and high-volume production. Computer aided design or drafting (CAD) is used to design parts quickly and accurately. Computer aided manufacturing (CAM) is used to fabricate products directly from CAD outputs. Swiss screw machining services that provide design assistance can help customers with concepts, manufacturing costs, manufacturing techniques and material considerations such as sourcing. They may also be able to assist with upgrading, redesigning, reevaluating or modernizing existing products to increase performance and/or reduce manufacturing costs. Some Swiss screw machining services have just-in-time (JIT) manufacturing capabilities or can provide prototypes for use in presentations or functional testing. Others provide low-volume or high-volume production.

Swiss screw machining services are located across the United States and around the world. They adhere to a variety of certifications, regulatory requirements, and quality standards. Swiss screw machining services follow four main specifications from the International Standards Organization (ISO): ISO 9001:2008, ISO 13485:2003, ISO 14001, and ISO/TS 16949:2002. AS 9000, AS 9100, and QS-9000 are industry-specific quality standards that are based on ISO 9001. Both AS 9000 and AS 9001 define quality management system (QMS) requirements for suppliers to the aerospace industry. QS-9000 is a quality standard for suppliers of Daimler Chrysler Corporation, Ford Motor Company, and General Motors Corporation. Some Swiss screw machining services are registered with the Food and Drug Administration (FDA), or comply with U.S. military specifications (MIL-SPEC). Others meet internal company specifications or requirements from original equipment manufacturers (OEM).

See our glossary page for a list of industry terms and their definitions.