Citizen Machinery CNC Lathes / Turning Centers

Citizen Miyano BNA-42DHY3

Est. $210,000 - $320,000 Specs verified 2026-10-03 · cmj.citizen.co.jp Updated 2026-10-03

Image: marucit.com, Citizen Machinery

Key Specifications

machining capacity and chuck system maximum machining diamet

42 mm dia./34 mm dia.

machining capacity and chuck system maximum machining length

100 mm

machining capacity and chuck system power chuck sp1 sp2

5"/4"

machining capacity and chuck system collet chuck type sp1 sp

Stationary

spindle spindle nose sp1 sp2

Special Flat Type

spindle spindle motor 15min rating cont sp1

7.5/5.5 kW

How much does the Citizen Miyano BNA-42DHY3 cost?

Estimated price range

Est.$210,000 - $320,000

Our best estimate for a cnc lathes / turning center in this class — not a quote from Citizen Machinery. Configuration moves it a long way.

Overview

The Citizen Miyano BNA-42DHY3 is a compact fixed-headstock bar lathe with two spindles and two turrets: an eight-station turret serving the main spindle (SP1) and a six-station turret serving the back spindle (SP2). SP1 takes bar to 42 mm dia. and runs 60 - 6,000 rpm; SP2 handles 34 mm dia. at 50 - 5,000 rpm. Maximum machining length is 100 mm, so this is a machine for short turned parts finished on both ends.

Having a turret on each spindle is what separates it from the single-turret Miyano BNA-42MSY2. Front and back operations can run at the same time instead of queuing for one tool post, which shortens the cycle on parts with real back-end work. The SP1 turret carries a Y axis of 70 mm(±35) for off-centre drilling and milling. Strokes are 140 mm in X1 and 235 mm in Z1; the second slide has 140 mm in X2 and a longer 360 mm in Z2.

Spindle motors are modest. SP1 is rated 7.5 kW for 15 min and 5.5 kW continuous, SP2 5.5 kW and 3.7 kW. Up to 8 revolving tools can be fitted, running 50 - 5,000 rpm on a 2.8/1.0 kW motor, which is enough for cross holes, flats and tapping on small parts rather than heavy milling. The turrets index in 0.2Sec./1St. using an AC servo motor and curvic coupling, and take 20 mm Sq. turning tools and 25 mm dia. drill shanks.

Power chucks are 5" on SP1 and 4" on SP2, with a special flat spindle nose. The machine needs a floor area of 2,350×1,450 mm, stands 1,700 mm high and weighs 3,100 kg, small enough to run several side by side in a cell.

Full Specifications

Parameter	Value
Machining Capacity and Chuck System Maximum Machining Diamet	42 mm dia./34 mm dia.
Machining Capacity and Chuck System Maximum Machining Length	100 mm
Machining Capacity and Chuck System Power Chuck Sp1 Sp2	5"/4"
Machining Capacity and Chuck System Collet Chuck Type Sp1 Sp	Stationary
Spindle Spindle Nose Sp1 Sp2	Special Flat Type
Spindle Spindle Motor 15min Rating Cont Sp1	7.5/5.5 kW
Spindle Spindle Motor 15min Rating Cont Sp2	5.5/3.7 kW
Spindle Spindle Speed Range Sp1	60 - 6,000 rpm
Spindle Spindle Speed Range Sp2	50 - 5,000 rpm
Turret Type of Turret Sp1	8St.Turret
Turret Type of Turret Sp2	6St.Turret
Turret Shank Height of Square Turning Tool	20 mm Sq.
Turret Diameter of Drill Shank	25 mm dia.
Turret Turret Indexing Clamp Method	AC Servo motor & curvic coupling
Turret Slide Stroke X1 Axis	140 mm
Turret Slide Stroke Z1 Axis	235 mm
Turret Slide Stroke Y Axis	70 mm(±35)
Turret Slide Stroke X2 Axis	140 mm
Turret Slide Stroke Z2 Axis	360 mm
Turret Indexing Time	0.2Sec./1St.
Revolving Tools Maximum Number of Revolving Tools Sp1 Sp2	8
Revolving Tools Tool Spindle Speed Range	50 - 5,000 rpm
Revolving Tools Revolving Tool Motor	2.8/1.0 kW
Machine Dimensions Machine Height	1,700 mm
Machine Dimensions Floor Space	2,350×1,450 mm
Machine Dimensions Machine Weight	3,100 kg

Specifications sourced from cmj.citizen.co.jp — verified 2026-10-03

Strengths & Limitations

Strengths

Two turrets, eight-station on SP1 and six-station on SP2, so front and back operations can overlap
Y axis of 70 mm(±35) on the SP1 turret for off-centre drilling and milling
Turret indexing of 0.2Sec./1St. with AC servo drive and curvic coupling
Long 360 mm Z2 stroke on the back-spindle side for back-end work and part transfer
Compact 2,350×1,450 mm floor space and 3,100 kg weight for cell layouts

Limitations

Maximum machining length is 100 mm, which limits the machine to short parts
SP2 bar capacity drops to 34 mm dia. against 42 mm dia. on SP1
SP1 motor is rated 7.5 kW for 15 min and 5.5 kW continuous, lower than the 11/7.5 kW of the Miyano BNA-42MSY2
No more than 8 revolving tools, on a 2.8/1.0 kW motor, so milling content has to stay light

Best For

Short bar parts up to 42 mm dia. needing work on both ends Parts with simultaneous front and back operations Cross drilling and flats using the 70 mm Y axis Dense cells of compact lathes

Frequently Asked Questions

01 How does the BNA-42DHY3 differ from the BNA-42MSY2?

The BNA-42DHY3 has two turrets, an eight-station for SP1 and a six-station for SP2, so both spindles can be cut at once. The Miyano BNA-42MSY2 has a single 8-station turret with a half-indexing mechanism but a stronger 11/7.5 kW SP1 motor. Both take 42 mm dia. bar on SP1 and 34 mm dia. on SP2, with 100 mm maximum machining length.

02 What bar sizes can the two spindles handle?

SP1 machines bar up to 42 mm dia. and SP2 up to 34 mm dia. Power chucks are 5" on SP1 and 4" on SP2. A part whose back end is larger than 34 mm dia. cannot be gripped on SP2 for back working.

03 What are the axis strokes?

X1 is 140 mm and Z1 235 mm on the SP1 turret slide, which also has a Y axis of 70 mm(±35). The second slide has 140 mm in X2 and 360 mm in Z2.

04 How many live tools can it take, and how fast do they run?

Up to 8 revolving tools, at 50 - 5,000 rpm, driven by a 2.8/1.0 kW motor. Turning tools are 20 mm Sq. and drill shanks 25 mm dia. That suits cross holes, small flats and tapping on bar parts.

05 How much space does the BNA-42DHY3 need?

Floor space is 2,350×1,450 mm, machine height 1,700 mm and weight 3,100 kg. Allow extra room for the bar feeder and chip handling, which the table does not include.