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 length100 mm
Diameter of standard cutting: Spindle No. 151 mm Dia.
Diameter of standard cutting: Spindle No. 242 mm Dia.
Chuck size: Spindle No. 16 inch
Chuck size:Spindle No. 25 inch
Number of spindles2
Spindle speed range: Spindle No. 1 & 25,000 rpm
Inner diameter of draw tube: Spindle No. 152 mm Dia.
Inner diameter of draw tube: Spindle No. 243 mm Dia.
Collet chuck: Spindle No. 1H-S22
Collet chuck: Spindle No. 2H-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. 112 station turret
Type of turret: Turret No. 28 station turret
Shank height of square turning tool3/4″ Sq.
Diameter of drill shank1″ 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 axis165 mm
Turret slide stroke: Z1 axis246 mm
Turret slide stroke: Y1 axis80 (± 40) mm
Spindle slide stroke: X2 axis85 mm
Spindle slide stroke: Z2 axis590 mm
Rapid feed rate: X1, Z1, X2, Z2 axes20 m/min
Rapid feed rate: Y1 axis12 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: Slide1.2 kw (X1, Z1, Y, X2, Z2)
Motors: Hydraulic oil motor2.2 kw
Motors: Lubricating oil motor0.004 kw
Motors: Coolant pump0.25 kw × 1, 0.18 kw × 1
Motors: Turret index motor0.75 kw
Power supply: VoltageAC 200/ 220 ±10% 50/ 60 Hz ±1%
Power supply: Capacity33 KVA
Power supply: Air supply0.5 MPa
Power supply: Fuse100 A
Hydraulic oil tank capacity10 L
Lubricating oil tank capacity4 L
Coolant tank capacity300 L
Machine height1,700 mm
Floor space2,630 × 1,540 mm (without chip conveyor)
Machine weight11,687 lbs
Controlled axisSimultaneously controlled axis Max.4
Controlled axisX1, Z1, Y1, Cs1, A1, A2, X2, Z2, Cs2
Min. input increment0.001 mm, 0.0001 inch, 0.001 deg
Min. output incrementX axis: 0.0005 mm, Z axis: 0.001 mm
Min. output incrementY axis: 0.001 mm
Parts program strage capacityTotal 1MB (2,560m Tape length)
Spindle functionSpindle speed S4-digits
Spindle functionConstant Cutting speed control (G96)
Rapid traverse rateX1, X2, Z1 axis: 20 m/min
Rapid traverse rateZ2 axis: 20 m/min
Rapid traverse rateY1 axis: 12 m/min
Cutting feed rateF 3.4 digit per revolution
Cutting feed rate override0-150% (in 10% increments)
InterpolationG01, G02, G03
ThreadingG32, G92
Canned cycleG90, G92, G94
Work coordinate settingAutomatic Setting, 64 work coordinate setting by the tool position
Tool selectionby TAABB at the specified position for each
Tool selectionturret tool wear compensation is selected by BB.
Direct input of tool positionby measured MDI
Input/ Output interfaceUSB, PC Card slot
Automatic operation1 cycle operation/ Continuous operation, Single block
Automatic operationBlock delete, Machine lock, Dry run, feed hold
Automatic operationOptional block skip

Exterior View