Citizen Miyano BNA-42DHY3

$210,000 - $320,000 Updated 2026-03-19

Key Specifications

max bar capacity sp1

42 mm (1.65 in)

max bar capacity sp2

34 mm (1.34 in)

max machining length

100 mm (3.94 in)

draw tube sp1

43 mm

draw tube sp2

30 mm

main spindle speed

60 - 6,000 RPM

Overview

The Citizen Miyano BNA-42DHY3 is the third-generation dual-spindle, dual-turret fixed-headstock CNC lathe with Y-axis in the BNA-42 platform. The DHY3 generation introduces the Fanuc 0i-TF control as standard, replacing the Mitsubishi CNC used on earlier DHY generations, along with a 16-station half-indexing turret configuration and refined turret mechanics.

The main spindle (SP1) runs from 60 to 6,000 RPM with 7.5/5.5 kW (10/7.5 hp), while the sub-spindle (SP2) reaches 5,000 RPM with 5.5/3.7 kW (7.5/5 hp). Bar capacity is 42 mm on the main spindle with a 43 mm draw tube diameter. The dual-turret configuration includes an 8-station upper turret (HD1) with 8 live tool positions (single clutch) running at 5,000 RPM with 2.8/1.0 kW (16 Nm), and a 6-station lower turret (HD2) serving the sub-spindle.

The DHY3 features 16 effective stations through half-indexing on the upper turret. Y-axis travel of +/-35 mm enables off-center machining. Axis travels measure 140 mm on X1, 235 mm on Z1, 140 mm on X2, and 360 mm on Z2. Rapid traverse rates of 20 m/min on X1, Z1, and Z2, with 12 m/min on Y, X2, and Z2 axes.

At approximately 3,100 kg (6,834 lb) with a floor space of 2,350 x 1,454 mm, the BNA-42DHY3 maintains the compact footprint of earlier DHY generations. The switch to Fanuc 0i-TF control is significant for shops already standardized on Fanuc, offering broader CAM post processor compatibility and familiarity for the majority of CNC programmers.

The DHY3 is the current-generation dual-turret option in the BNA-42 lineup. True simultaneous independent machining on both turrets reduces cycle times by 30-50% on parts with substantial backworking requirements. The Fanuc control upgrade makes the DHY3 more accessible to shops that found the Mitsubishi control on earlier generations to be a barrier.

Full Specifications

Parameter	Value
Max Bar Capacity Sp1	42 mm (1.65 in)
Max Bar Capacity Sp2	34 mm (1.34 in)
Max Machining Length	100 mm (3.94 in)
Draw Tube Sp1	43 mm
Draw Tube Sp2	30 mm
Main Spindle Speed	60 - 6,000 RPM
Main Spindle Power	7.5/5.5 kW (10/7.5 hp)
Sub Spindle Speed	50 - 5,000 RPM
Sub Spindle Power	5.5/3.7 kW (7.5/5 hp)
Upper Turret Stations	8 (16 with half-indexing)
Lower Turret Stations	6
Live Tool Stations	8 (Single Clutch)
Live Tool Speed	5,000 RPM
Live Tool Power	2.8/1.0 kW (16 Nm)
Travel X1	140 mm (5.51 in)
Travel Z1	235 mm (9.25 in)
Travel X2	140 mm (5.51 in)
Travel Z2	360 mm (14.17 in)
Y Axis Travel	70 mm (+/-35 mm)
Rapid Traverse X1 Z1	20 m/min (787 ipm)
Rapid Traverse Y X2	12 m/min (472 ipm)
Rapid Traverse Z2	20 m/min (787 ipm)
Power Chuck Sp1	5 inch
Power Chuck Sp2	4 inch
Machine Weight	6,173 lbs.
Floor Space	2150 x 1290 mm
CNC Control	Fanuc 0i-TF
Item	BNA-42S2
Max Bar Diameter	â 42 mm
Standard Machining Length	100 mm
Draw Tube Diameter	â 43 mm / â 30 mm
Power Chuck Size	5" / --
Number Of Turrets	1
Turret Stations	8 / --
Total Tooling Availability	8 Sta.
Tool Spindle Speed	5,000 minâ»Â¹
Shank Size	â¢ 3/4" / â 1"
Rapid Feed Rate	--
Turret Stroke	--
Sub Spindle Stroke	310 mm (B)
Spindle Motor	7.5/5.5 kW / 5.5/3.7 kW
Live Tool Motor	2.8 / 1.0 kW (16 Nm)
High Pressure Coolant Motor	1.0 kW (145 PSI)
Input Capacity Fuse	28 KVA / 100 A
Hydraulic Tank Capacity	1.8 gal.
Lubricating Tank Capacity	0.5 gal.
Coolant Tank Capacity	43.5 gal.

Specifications sourced from marucit.com — verified 2026-03-28

Strengths & Limitations

Strengths

Fanuc 0i-TF control standard offers broader CAM post processor compatibility and is familiar to the majority of CNC programmers, reducing the learning curve
True dual-turret independence enables simultaneous machining on both spindles, reducing cycle times 30-50% on parts with substantial backworking
16 effective tool positions through half-indexing on the upper turret maximizes tooling density from the 8-station physical turret
Compact 2,350 x 1,454 mm footprint maintains the BNA-42 platform's space efficiency despite the dual-turret configuration
2.8/1.0 kW (16 Nm) live tool motor provides adequate torque for cross-drilling, tapping, and moderate milling operations
Current third-generation design with refined turret mechanics and updated control software over earlier DHY models

Limitations

8+6 station turret configuration provides fewer total tool positions than BNJ-series machines with 12+12 or 12+8 configurations
7.5/5.5 kW main spindle power is modest for aggressive roughing on harder materials at full 42 mm bar diameter
34 mm sub-spindle capacity restricts full-diameter backworking on the largest parts in the 42 mm range
Fanuc 0i-TF control is different from the Mitsubishi CNC on other Miyano machines, potentially complicating training in shops running mixed Miyano platforms

Best For

Shops standardized on Fanuc controls that want Miyano dual-turret precision without adopting the Mitsubishi platform used on earlier DHY generations High-volume production of medical, automotive, and electronic components where dual-turret simultaneous machining directly reduces per-part cost Contract manufacturers upgrading from earlier DHY generations seeking current-production warranty coverage and Fanuc control familiarity Production environments where broad CAM post processor compatibility for the Fanuc 0i-TF simplifies programming across multiple machine brands Shops currently running single-turret BNA-42 machines that need the cycle time reduction of dual-turret independence

Frequently Asked Questions

01 What does a new Citizen Miyano BNA-42DHY3 cost?

New BNA-42DHY3 machines typically range from $210,000 to $320,000 depending on tooling, high-pressure coolant, bar feeder, and parts catcher. The DHY3 with Fanuc control may carry a slight premium over the Mitsubishi-controlled DHY for the control system upgrade.

02 Why did Citizen switch to Fanuc control on the DHY3?

The Fanuc 0i-TF offers broader industry compatibility, more available CAM post processors, and is familiar to a larger pool of CNC programmers. This makes the DHY3 more accessible to shops that found the Mitsubishi control on earlier generations to be a training barrier. Both controls are equally capable for the machine's dual-turret operations.

03 How does the DHY3 compare to the BNJ-42SY for dual-turret machining?

The BNJ-42SY has larger 12+8 station turrets (20 total), higher spindle power (15/11 kW), and longer Z2 travel (590 mm). The DHY3 is more compact and lighter at 3,100 kg versus 5,300 kg for the BNJ. Choose the DHY3 for compact installation and lower cost; choose the BNJ for maximum tooling and spindle power.

04 Can programs from the Mitsubishi-controlled DHY run on the DHY3?

No, programs require conversion between Mitsubishi and Fanuc G-code formats. The part programming logic is similar but the specific codes, macro formats, and control parameters differ. CAM software handles this through different post processors for each control type.