Citizen Miyano GN-3200

The Citizen Miyano GN-3200 is a gang-type CNC lathe designed for ultra-fast cycle times on small precision parts up to 32mm in diameter. Gang-type lathes mount tools on a linear slide rather than a rotating turret, eliminating turret indexing time entirely—every tool change is a rapid traverse rather than a mechanical rotation. For small parts with multiple turning operations, this design produces dramatically shorter cycle times than conventional turret lathes.

The GN-3200 features a main spindle reaching 8,000 RPM with a 32mm bar capacity, positioning it in the same size range as Swiss-type lathes but with a fixed-headstock configuration optimized for short parts. The gang tool post accommodates multiple turning tools, grooving tools, and threading tools arranged linearly, with tool-to-tool change times measured in fractions of a second. Cross-working tools can also be mounted on the gang slide for drilling and simple cross-operations.

Citizen's gang-type design is particularly effective for parts that require multiple turning operations—rough turn, finish turn, face, groove, thread—where the time saved by eliminating turret indexing on each tool change compounds across the cycle. On a typical 5-operation part, the GN-3200 can save 2-4 seconds per part compared to a turret lathe, translating to significant productivity gains across high-volume production runs.

The machine's construction follows Miyano standards: thermally symmetric cast iron, precision-ground slideways, and meticulous assembly. The gang slide rides on hardened and ground ways, providing the rigidity needed for consistent accuracy across millions of cycles. The compact machine footprint is among the smallest in the Miyano lineup, making it ideal for multi-machine production cells.

The GN-3200 is a specialist machine for high-volume shops that produce large quantities of small turned parts. It thrives in automotive, electronics, and fastener applications where every second of cycle time translates directly to profitability. Shops that run parts in quantities of 10,000 or more per month see the most dramatic return on the gang-type advantage.