Citizen Miyano BND-51SY

Citizen Miyano machines are quoted per configuration through regional distributors, and on a fixed-headstock turning centre like this the tooling package is a bigger share of the total than buyers expect — 12 live tool stations means 12 driven holders. The other variables are high-pressure coolant, the bar feeder, parts catcher and conveyor, and any gantry or robot automation. The 51 mm bar platform commands a real premium over the 42 mm BNA series. Used BND-51SY machines trade on hours, spindle condition, and crucially whether the live tooling comes with the machine.

The BNJ-51SY is a twin-turret machine with a 12-station main turret and 8-station sub turret, enabling true simultaneous independent machining on both spindles. The BND-51SY has a single turret with superimposition control. The BNJ is faster on complex parts with heavy backworking and is priced above the BND accordingly — and the second turret also needs its own tool holders. Choose the BND for simpler parts and a tighter budget; choose the BNJ when backworking complexity justifies the twin-turret investment.

Common bar feeder pairings include the LNS Quick Load Servo 80, Edge FMB Turbo 5-65, and Iemca Master 80. Choose a magazine-style loader for production runs and a hydrodynamic loader for tighter roundness tolerance requirements. The 51 mm capacity requires a feeder rated for at least 2-inch bar stock.

Yes. The BND-51SY supports both collet chucks (Hardinge or DIN standard) and 6-inch hydraulic power chucks. Collets are preferred for bar work requiring high concentricity and fast changeover, while power chucks handle castings, forgings, and irregular blanks. Most shops keep both options available for maximum flexibility.

The maximum bar capacity is 51 mm through the spindle bore. With a 6-inch power chuck, the machine can swing larger diameters for chucker-type work on pre-cut blanks and castings, though the practical turning diameter depends on turret clearance and toolholder configuration.

The 320 mm maximum machining length is supported by the generous 435 mm Z1 travel and 530 mm Z2 sub-spindle travel. For longer parts, the sub-spindle can act as a tailstock-style support during main spindle machining before picking up the part for backworking. Bar feeder integration handles continuous feeding of long bar stock for high-volume production.