Citizen Miyano ABX-51SYY

The Citizen Miyano ABX-51SYY is a compact, high-capability turning center from Citizen's Miyano brand offering 51mm bar capacity with a Y-axis for off-center milling and drilling, plus a sub-spindle for complete part machining in a single setup. The ABX series represents Citizen Miyano's mid-size turning center platform—more capable than the smaller LX and LZ series but more compact and cost-efficient than the larger BNX and BNE series machines. The 51mm bar capacity targets the part families that fall between small-diameter Swiss work and large-diameter conventional turning, covering automotive components, instrumentation housings, and medical device bodies in the 30-51mm range.

The Y-axis is the defining capability of the SYY configuration—it enables true off-center milling, eccentric drilling, keyway milling, and flat feature machining that a Y-axis-less lathe cannot accomplish without fixturing on a machining center. On the ABX-51SYY, the Y-axis travels ±30mm, sufficient for the full range of off-center features on 51mm diameter parts. The main spindle Y-axis operates in conjunction with live tooling, enabling driven tool operations at any position within the Y travel—a fundamental requirement for complete part machining without secondary operations.

The dual 'YY' designation indicates that both the main spindle and sub-spindle sides have Y-axis capability, which is a significant differentiator. Sub-spindle Y-axis enables complex backwork features—off-center drilling, eccentric milling, and secondary flats on the sub-spindle end—without removing the part and re-fixturing on a machining center. This configuration enables full complete machining of parts with Y-axis features on both ends from a single bar loading.

Main spindle is rated at 6,000 RPM with 7.5/11 kW (continuous/peak), appropriate for turning 51mm diameter workpieces in stainless, titanium, and tool steel. The sub-spindle operates at 6,000 RPM with 3.7/5.5 kW, providing capable secondary machining. Maximum bar capacity is 51mm (2.0 inches) with chuck capacity extending to 65mm. The Mitsubishi M80 control handles multi-axis coordination with dedicated Miyano software for sub-spindle synchronization and Y-axis management. Machine footprint is compact at approximately 1,950 x 1,750 x 1,750 mm—smaller than comparable turning centers with equivalent capability—consistent with the Miyano brand's reputation for compact, efficient machine design.