Fixed Headstock Type CNC Automatic Lathe

BNX-51MSY brochure

(PDF – 1.8 MB)

This two spindle, one turret machine featuring simultaneous control supports the machining of complex and precision parts.


  • Fixed headstock type CNC Automatic Lathe
  • 7-cutting axes (X1, Z1, Y1, X2, Z2, C1, C2)
  • Two spindles
  • One turret
  • One Y-axis slide
  • 25-Nm twelve revolving tool stations
  • 2" diameter bar capacity
  • 5.9" work length

The BNX-51MSY includes the new, more powerful Mitsubishi M70V control that comes standard with a multitude of user-friendly CNC attributes.   Featuring superimposition control where machining is performed with the movement of the back spindle synchronized with that of the tool slide.

The 12-station turret, allowing revolving tools to be mounted at all stations, incorporates a Y-axis and supports the machining of complex shapes.  Longer and larger workpieces can be handled thanks to the extended stroke of the X1 axis, increased capacity of the servomotor, extended stroke of the X2 axis and increased back spindle chuck size.

Standard NC functions

Optional NC functions

Spindle C axis control (main-back)

Spindle synchronization function (main - back)

User macros

Canned cycle for drilling

Constant surface speed control

Polygon turning

Spindle synchronized tapping function (main-back)

Tool spindle synchronized tapping function

Sub-inch control

Milling interpolation

Helical interpolation

Multiple repetitive cycle for turning I/II

B code I/F

Tool diameter offset

Nose radius compensation

High speed program check

Optional block skip (1 set)

Superimposition of control axes

Torque skip function

Corner chamfering/Corner rounding

Arbitrary axis exchange function

Continuous thread cutting

Network I/O function

Variable lead thread cutting function

High speed synchronized tapping function

Simultaneous thread cutting in two axis control groups 1

Simultaneous thread cutting in two axis control groups 2

Tool life management I

External memory running

Program storage capacity 320m, 600m

Common variables (50 + 50 * Number of axis control groups)

Common variables (100 + 100 * Number of axis control groups)

Standard accessories

SP1/SP2 Chucking Device H-S22

Splash guard interlock

Spindle Air Blow

Spindle Brake

SP2 Work Ejector & Inner High Pressure Coolant

Part Conveyor

Chip Conveyor

3-Color Signal Tower

Total & Preset Counter (Custom Menu)

Cut-Off Confirmation (Electric Type)

Barfeeder Interface

Coolant Level Switch

Standard Tooling Package

Optional accessories

1000 psi High Pressure Coolant

Mist Collector

Parts Carrier

Cut-Off Confirmation (Cylinder Type)

3-Jaws Chuck Systems

Machine specifications

Machine Model


Machining Capacity

Maximum machining length

150 mm 

Diameter of standard cutting

Spindle No. 1

51 mm Dia.

Spindle No. 2

51 mm Dia.

Chuck size

Spindle No. 1

6 inch

Spindle No. 2

5 inch


Number of spindle


Spindle speed range

Spindle No. 1

5,000 min-1

Spindle No. 2

5,000 min-1

Inner diameter of draw tube

Spindle No. 1

52 mm Dia.

Spindle No. 2

43 mm Dia.

Collet chuck

Spindle No. 1

H-S22, (DIN177E - option)

Spindle No. 2

H-S22, (DIN177E - option)

Power chuck

Spindle No. 1

6" thru-hole chuck

Spindle No. 2

5" thru-hole chuck


Number of turret


Type of turret

Turret No. 1

12 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

Type of revolving tool

Turret No. 1

Single clutch

Tool spindle speed range

Turret No. 1

6,000 min-1

Machining capacity         Drill

Turret No. 1

Max. 13 mm Dia.


Turret No. 1

Max. M12×1.75 (S45C-D)

Slide stroke

Turret slide stroke

X1 axis

165 mm

Z1 axis

300 mm

Y1 axis

80 (±40) mm

Spindle slide stroke

X2 axis

86 mm

Z2 axis

553 mm

Feed rate

Rapid feed rate

X1 axis

20 m/ min

Z1 axis

20 m/ min

Y1 axis

12 m/ min

X2 axis

20 m/ min

Z2 axis

20 m/ min


Spindle drive

Spindle No. 1 Cs

15/ 11 kw (15 min/ cont.)

Spindle No. 2 Cs

7.5/ 5.5 kw (15 min/ cont.)

Revolving tool drive

Turret No. 1

4.0 kw


1.5 kw (Z1), 1.2 kw (X1, Y, X2, Z2)

Hydraulic oil motor

1.36 kw

Lubricating oil motor

0.004 kw

Coolant pump

0.25 kw×1, 0.18 kw×1

Turret index motor

1.0 kw

Power supply


AC 200/ 220±10%  50/ 60 Hz±1%


33 KVA

Air supply

0.5 MPa


100 A

Tank capacity

Hydraulic oil tank capacity

2.6 gal

Lubricating oil tank capacity

1 gal

Coolant tank capacity

79 gal

Machine dimensions

Machine height

1,700 mm 

Floor space

3,907 × 1,540 mm (w/chip conveyor)

Machine weight

11,240 lb

Exterior view

Marubeni Citizen-Cincom, Inc.

40 Boroline Road

Allendale, NJ 07401

Phone: 201-818-0100

Fax: 201-818-1877

Parts Fax: 201-818-1816