Two BNA Series models with improved basic functions

A surface plate structure, a tradition of the Miyano brand, has been carried over for the bed, an essential element for machining, while both size and weight have been increased in order to improve damping performance. Additionally, the coolant tank capacity has been increased to improve thermal stability. Rigidity of the entire turret tool post has been increased, and equipping with a Y axis enables the use of 12 stations. The number of installed tools has also been increased.

The cover has been completely redesigned to improve workability.
The opening has been enlarged for easier access and provided with a large window to improve visibility.

The port through which chips fall has been enlarged and the removal port has been moved closer to the
outer edge of the cover to make it easier to clean away chips.
These new NC units are standard-equipped with a dual-check safety function to improve safety and

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Machine Specification
Item BNA-42CY5 BNA-42SY5 NC specifications
Capabilities/Capacities BNA-42CY5 BNA-42SY5
Max. machining length 200 mm 100 mm Control unit FS.0i-TF PLUS
Standard machining diameter (Chuck diameter) SP1 42 mm dia. Control axisHD1 X1, Z1, Y1, C1, E1 (Turret) X1,Z1,Y1,B1, C1, C2, E1
SP2 34 mm dia. A1 (Rotary tools) (Turret), A1 (Rotary tools)
Travel distance During superimposed
Turret slide travel distance X axis 140 mm operation: X1, Z1, Y1,
Z axis 285 mm C1, E1 (Turret)
Y axis 70 (+/-35) mm HD2 – – – A1 (Rotary tools)During superimposed
Back spindle slide travel distance B axis 360 mm operation: Z2, C2,
Spindles Feed axis absolute position detector X, Z1, Y1 X1,Z1,Y1,B
Number of spindles 1 2 Min. set unit 0.001 mm/0.001 deg.
Spindle speed SP1 60 to 6,000 min -1 Interpolation function
SP2 50 to 5,000 min-1 PositionerLinear interpolation G00G01
Closing tube through-hole diameter SP1 43 mm dia. Circular interpolation G02, G03 (multiple quadrants available)
SP2 30 mm dia. Dwell G04
Collet chuck type SP1 Hardinge S20, DIN173E, B&S #22D, Threading G32
JPN34, Hainbuch Multiple threading G33
SP2 JPN, DIN171E Feed functionRapid feeding override 0 to 100% (10% increments)
DIN173E, B&S #22 Cutting feed speed override 0 to 150% (10% increments)
Power chuck type SP1 5″ and 6″ hollow chucks 5″ hollow chuck Per minute feed and per rotation G98/G99
SP2 4″ hollow chuck Manual handle feeding x1, x10, x100
Tool post Reference point return G28
Number of tool posts 1 Reference point return chuck G27
2nd reference point return G30 or G30P2
Type of tool post 12 ST. Program input function
Opposite side distance of tool post 300 mm Tape code EIA/ISO auto-detection
Max. turning radius of tool post 505 mm dia. Absolute commands X,Z,Y,C X,Z,Y,C,B
Dimensions of tools used □ 20 mm Incremental commands U, W, V, H
Dimensions of tool post holes 25 mm dia. Programmable data inputCoordinate system settings G10G50
Rotary tools Workpiece coordinate system G54 to G59
Number of installed rotary tools Max.12 Program storage and editing
Type of rotary tool drive Independent clutch drive Program storage capacity 512 Kbyte 1 Mbyte (Two system total)
Rotating speed of rotary tools 50 to 5,000 min-1 Number of registered programs 400 800 (Two system total)
Machining capacities Drill Max. 10 dia. Spindle and supplementary functionsSpindle functions S4 digits
Tap Max. M6 × 1 Supplementary functions M3 digits
(Limited to spiral and point taps for M8 x 1.25) Constant peripheral speed control G96
Max. M8 x 1.25 for BSBM Tool and tool compensation functions
Feed rate Tool functions T ○○△△
Rapid feed rate X axis 20 m/min ( ○○ = Tool selection and shape compensation,△△ = Wear compensation)
Z axis 20 m/min Nose radius compensation G40,G41,G42
Y axis 12 m/min Operating functions
B axis 20 m/min Optional stop M01
Slide thrust Jog feeding 0 to 1,260 mm/min
X axis 5 kN Input/Output interface
PC card slot and USB memory slot
Z axis 5 kN Automatic operation
Y axis 6.7 kN One-cycle/Continuous operation, single block, block delete, machine lock
B axis 5 kN Optional block skip, dry run, feed-hold, optional stop
Tailstock Other
Max. travel distance 200 mm 10.4″ color LCD, supporting multiple languages, decimal-point input, manual pulse generator
Memory protection, AC digital servos, etc.
Morse taper size MT2 Standard NC functions
Max. slide thrust 4.3 kN (at 3.4 MPa) Chamfering/corner R, background editing, operating time/number of parts display
Min. slide thrust 0.57kN (at0.45 MPa) Canned composite cycles (G70 to G76), spindle synchronization function (SY only)
Drive method Hydraulic Spindle rigid tapping (Main and sub (SY only))
Motors Cylindrical interpolation, custom macro B, canned drilling cycles (G80 to G86)
Tool service life management, superimposition control function (SY only)
Spindle motor SP1 11/7.5/5.5 kW (15%/15 min/cont.)
SP2 5.5/3.7 kW (15 min/cont.)
Rotary tools motor 2.8/1.0 kW
Coolant pump motor 0.25 kW
High-pressure coolant motor 1.1/0.75 kW (60/50Hz)
Required power source
Power supply AC 200/220 +5%/-10%, 50/60 Hz ±1%
Power supply capacity 16 kVA 26 kVA
Air pressure source 0.5 MPa
Fuse capacity on facilities side 75 A 100 A
Tank capacities
Hydraulic tank capacity 18 L
Lubricating oil tank capacity 2 L
Coolant tank capacity 225 L
Machine size
Machine height 1,745 mm
Required floor surface area W 2,260 x D 1,433 mm W 2,350 x D 1,433 mm
Machine weight 3,430 kg 3,880 kg


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