Citizen Cincom L12 Type X

The Citizen Cincom L12 Type X is a 12 mm sliding-headstock lathe for small precision parts, with a main spindle that reaches 15,000 rpm in guide-bush mode, a 12,000 rpm back spindle and up to 38 tools. Citizen introduces it as its newest L12 development, with a Y2 axis added for the back spindle.

That Y2 axis is the point of the Type X. Citizen says it strengthens back machining, gives more freedom in how operations are split between the two spindles and raises the maximum number of tools to 38. On the back end, rotary tools drill to 5 mm and tap to M4 at up to 9,000 rpm, the back spindle itself drills 8 mm and taps M6, and up to 30 mm of the part can protrude from its 12 mm chuck. Back drilling positions are listed as 8, with 17 given in brackets. The 0.5 kW back tool post rotary drive is marked as an option in Citizen's table.

The two working modes behave quite differently. With the guide bush the main spindle runs to 15,000 rpm and one chucking covers 135 mm. Guide-bushless, the speed limit is 12,000 rpm and the stroke 30 mm, which suits short parts where bar remnant matters. Front drilling reaches 8 mm with M6 taps through a 20 mm spindle bore.

Tooling on the gang post is flexible: 7 turning tools, between 6 and 17 rotary tools, and front drills from 2 as standard up to 11. The gang rotary tools drill 5 mm and tap M4 at up to 10,000 rpm on a 0.75 kW motor. Turning tools are 10 mm square, or 12 mm square as an option. All axes rapid at 35 m/min.

The front spindle motor is listed as 2.2/3.7 kW and the back spindle as 0.75/1.5 kW. Installation is modest: 6.6 kVA, a 40 A breaker, 0.5MPa air at 55 NL/min, and a W1,840 × D970 × H1,710 mm footprint for a 2,200 kg machine.