Miyano BNJ-51SY6

Fixed headstock type CNC automatic lathe

  • 7-cutting axes (X1, Z1, Y1, X2, Z2, C1, C2)
  • Two spindles
  • Two turrets
  • One Y-axis slide
  • 25 Nm twelve revolving tool stations (main turret)
  • Eight tool stations (turret No. 2)
  • 2″ diameter bar capacity
  • 3.9″ work length

Additional Details

The BNJ-51SY6 includes the new, more powerful Fanuc 0i-TF control that comes standard with a multitude of CNC features that were not available on previous generations of the control. In addition, 8-Station Sub Turret makes free simultaneous machining Front-Back.

NC Standard Functions

  • 10.4″color LCD
  • No of registered programs: 800
  • Decimal point input
  • Manual pulse generator
  • Memory protect
  • Polar coordinate interpolation
  • Programmable data input (G10)
  • C-axis control (SP1/SP2)
  • Superimposed control A
  • Chamfering/ Corner R
  • Tool nose R compensation
  • Background editing
  • Synchronous mixed control
  • Operating time/ Parts No. display
  • Multiple repetitive canned cycle (G70-G76)
  • Continuous threading
  • Canned cycle for drilling
  • Tool life management system
  • Variable-lead cutting
  • Rigid tap function (Spindle & Revolving tool)
  • Circular interpolation
  • Custom macro
  • Handle retrace function
  • Polygon cutting
  • Synchronized function
  • Dual check safety
  • Network I/O function
  • Reference position setting
  • Helical interpolation, RS-232C

Other Functions

  • Splash guard interlock
  • Coolant
  • Pneumatic unit
  • Machine light
  • Non-fuse breaker
  • SP2 Work ejector & inner high pressure coolant
  • Chuck close confirmation
  • Total & preset counter (Custom menu)
  • Cut-off confirmation
  • High pressure coolant
  • Revolving tool (HD2)
  • Spindle brake
  • Air blow
  • Parts catcher & Parts conveyor
  • Chip conveyor
  • Coolant level switch
  • Bar feeder interface
  • Signal tower
  • Automatic power shut-off
  • Thermo revision

Optional Accessories

  • Drill breakage detector
  • Part carrier
  • Chip box
  • Tool holder, tools, etc.


Maximum machining length 100 mm
Diameter of standard cutting: Spindle No. 1 51 mm Dia.
Diameter of standard cutting: Spindle No. 2 42 mm Dia.
Chuck size: Spindle No. 1 6 inch
Chuck size:Spindle No. 2 5 inch
Number of spindles 2
Spindle speed range: Spindle No. 1 & 2 5,000 rpm
Inner diameter of draw tube: Spindle No. 1 52 mm Dia.
Inner diameter of draw tube: Spindle No. 2 43 mm Dia.
Collet chuck: Spindle No. 1 H-S22
Collet chuck: Spindle No. 2 H-S16, DIN171E
Power chuck: Spindle No. 1: 6″ thru-hole chuck
Power chuck: Spindle No. 2: 5″ thru-hole chuck
Number of turrets: 2
Type of turret: Turret No. 1 12 station turret
Type of turret: Turret No. 2 8 station turret
Shank height of square turning tool 3/4″ Sq.
Diameter of drill shank 1″ Dia.
Revolving tools: Number of revolving tool (Turret No. 1) Max. 12
Revolving tools: Number of revolving tool (Turret No. 2) Max. 4
Revolving tools: Type of revolving tool (Turret No. 1) Single clutch
Revolving tools: Type of revolving tool (Turret No. 2) Simultaneous drive in all positions
Revolving tools: Tool spindle speed range (Turret No. 1) 6,000 rpm
Revolving tools: Tool spindle speed range (Turret No. 2) 3,000 rpm
Revolving tools: Machining capacity Drill (Turret No. 1) Max. 13 mm Dia.
Revolving tools: Machining capacity Drill (Turret No. 2) Max. 10 mm Dia.
Revolving tools: Tap (Turret No. 1) Max. M12 × 1.75 (S45C-D)
Revolving tools: Tap (Turret No. 2) Max. M6 × 1.0 (S45C-D)
Turret slide stroke: X1 axis 165 mm
Turret slide stroke: Z1 axis 246 mm
Turret slide stroke: Y1 axis 80 (± 40) mm
Spindle slide stroke: X2 axis 85 mm
Spindle slide stroke: Z2 axis 590 mm
Rapid feed rate: X1, Z1, X2, Z2 axes 20 m/min
Rapid feed rate: Y1 axis 12 m/min
Motors: Spindle drive (Spindle No. 1 Cs) 15/ 11 kw (15 min/cont.)
Motors: Spindle drive (Spindle No. 2 Cs) 7.5/ 5.5 kw (15 min/cont.)
Motors: Revolving tool drive (Turret No. 1) 2.2 kw
Motors: Revolving tool drive (Turret No. 2) 0.75 kw
Motors: Slide 1.2 kw (X1, Z1, Y, X2, Z2)
Motors: Hydraulic oil motor 2.2 kw
Motors: Lubricating oil motor 0.004 kw
Motors: Coolant pump 0.25 kw × 1, 0.18 kw × 1
Motors: Turret index motor 0.75 kw
Power supply: Voltage AC 200/ 220 ±10% 50/ 60 Hz ±1%
Power supply: Capacity 33 KVA
Power supply: Air supply 0.5 MPa
Power supply: Fuse 100 A
Hydraulic oil tank capacity 10 L
Lubricating oil tank capacity 4 L
Coolant tank capacity 300 L
Machine height 1,700 mm
Floor space 2,630 × 1,540 mm (without chip conveyor)
Machine weight 11,687 lbs
Controlled axis Simultaneously controlled axis Max.4
Controlled axis X1, Z1, Y1, Cs1, A1, A2, X2, Z2, Cs2
Min. input increment 0.001 mm, 0.0001 inch, 0.001 deg
Min. output increment X axis: 0.0005 mm, Z axis: 0.001 mm
Min. output increment Y axis: 0.001 mm
Parts program strage capacity Total 1MB (2,560m Tape length)
Spindle function Spindle speed S4-digits
Spindle function Constant Cutting speed control (G96)
Rapid traverse rate X1, X2, Z1 axis: 20 m/min
Rapid traverse rate Z2 axis: 20 m/min
Rapid traverse rate Y1 axis: 12 m/min
Cutting feed rate F 3.4 digit per revolution
Cutting feed rate override 0-150% (in 10% increments)
Interpolation G01, G02, G03
Threading G32, G92
Canned cycle G90, G92, G94
Work coordinate setting Automatic Setting, 64 work coordinate setting by the tool position
Tool selection by TAABB at the specified position for each
Tool selection turret tool wear compensation is selected by BB.
Direct input of tool position by measured MDI
Input/ Output interface USB, PC Card slot
Automatic operation 1 cycle operation/ Continuous operation, Single block
Automatic operation Block delete, Machine lock, Dry run, feed hold
Automatic operation Optional block skip

Exterior View