Miyano BNJ-51SY6: A Powerhouse for Complex Machining

Nov 10, 2023


The Miyano BNJ-51SY6 is a CNC sliding headstock lathe designed for high-production machining of complex parts up to 2 inches in diameter. This machine boasts a combination of features that make it a versatile and efficient option for manufacturers.

Key Features:

  • Simultaneous Front and Back Machining: The BNJ-51SY6 features a unique design with a stationary main spindle headstock and a traversing main turret with X and Y-axis capability. This allows for simultaneous machining on the main spindle and sub-spindle, significantly improving cycle times.
  • Enhanced Sub-spindle Functionality: The latest BNJ model introduces an 8-station sub-turret with the ability to mount up to four live tool spindles. This expands the machine's capabilities for complex machining on the sub-spindle.
  • Powerful Main Turret: The 12-station main turret offers excellent flexibility and can now accommodate live tools with up to 25 Nm of torque, allowing for more demanding machining operations.
  • Y-axis on Main Turret: The Y-axis capability on the main turret opens doors to a new level of machining possibilities. Complex tasks like plane milling, pocket milling, and large-diameter helical threading become achievable on the BNJ-51SY6.
  • Fanuc 0i-TF Control: The machine comes equipped with the latest Fanuc 0i-TF control, offering a wide range of CNC functionalities that enhance programming ease and efficiency.

Specifications:

  • Maximum Bar Capacity: 51 mm (2 in)
  • Standard Turning Length (SP1/SP2): 100 mm (3.94 in)
  • Standard Machining Diameter (SP1/SP2): 42 mm (1.65 in) / 51 mm (2 in)
  • Spindle Speed Range (SP1): 60 - 6,000 min-1
  • Spindle Speed Range (SP2): 50 - 5,000 min-1
  • Main Turret Stations: 12 (all live capable)
  • Sub-turret Stations: 8 (with 4 live positions)
  • Maximum Drilling Diameter (Main Turret): 13 mm (0.51 in)
  • Maximum Tapping Diameter (Main Turret): M12 x 1.75
  • Turret Slide Stroke (X-axis): 165 mm (6.5 in)
  • Motor Power (15 min / cont): 15 kW / 11 kW (20.1 hp / 14.8 hp)

Additional Benefits:

The Miyano BNJ-51SY6 comes standard with a chip conveyor, part conveyor, parts catcher, standard OD tool package, and patrol light, ensuring a complete and operator-friendly machining solution.


The Miyano BNJ-51SY6 is a powerful and versatile CNC lathe ideal for manufacturers seeking to improve production efficiency and tackle complex machining tasks. With its combination of advanced features, powerful capabilities, and user-friendly design, the BNJ-51SY6 is a valuable asset for any machine shop.

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