Koma Precision
Published

Swiss-Type Machine for Part Size Versatility

Swiss-type machine features flexibility of a removable guide bushing to enable turning for a range of part sizes from 4 to 42 mm.

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There are 33 tool positions and 13 driven tools provided as standard in the basic Genturn SL-42Y2 Swiss-type machine. Photo Credit: Expand Machinery

There are 33 tool positions and 13 driven tools provided as standard in the basic Genturn SL-42Y2 Swiss-type machine. Photo Credit: Expand Machinery

Expand Machinery’s 8-axis Genturn SL-42Y2 hybrid Swiss machine was designed to handle a range of part sizes from 4 to 42 mm. It can machine parts as small as 4 mm using a guide bushing and can also run larger work without a guide bushing up to 1-5/8" diameter — all in the same machine for a complete part in just one operation.

Having two independent Y axes enables simultaneous main and subspindle machine efficiency and provides additional tooling possibilities. There are 33 tool positions and 13 driven tools provided as standard in the basic machine, including 13 driven tools and 13 backworking tool positions to enable users to complete complex parts.

The main spindle features 20 tools that include six live crossworking driven tools and three axial live tools, six turning tool stations and five ID tool stations. The five ID tool stations can also utilize dual insert toolholders to further increase the total tool count. The subspindle has 13 tool stations, including four driven stations with four live toolholders as well as and four ID tool positions. An option of up to four additional driven tools can be inserted into the subspindle tool block as needed for a maximum of eight driven tools.

The backside of the five ID tool stations on the main tool bridge can be utilized on the subspindle as required. Both the main spindle and the subspindle have a high-performance, C-axis with full contouring with 360,000 radial positions (0.0001-degree resolution) to facilitate engraving and detailed milling requirements.

The main spindle uses a 10-hp motor driving a 6,000-rpm spindle that uses a Traub A-42 collet. The subspindle uses a 6-hp motor to drive the 6,000-rpm subspindle. The maximum cut length using a guide bushing is 12.6". The one-piece, heavy-duty box-style machine bed and base casting is made of a high-density Meehanite processed cast iron that is heavily ribbed to increase lateral stiffness and maximize stress absorption during the machining process.

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