Citizen Machinery Mill-Turn / Multi-Tasking Machines

Citizen Miyano BNE-51MYY

Est. $380,000 - $520,000 Specs verified 2026-10-03 · cmj.citizen.co.jp Updated 2026-10-03

Image: cmj.citizen.co.jp, Citizen Machinery

Key Specifications

Max Spindle

5,000 rpm

max machining length

195 mm

standard machining diameter

51 mm dia.

number of spindles

collet chuck type

Hardinge S22, DIN177E, HAINBUSH 51

power chuck type

6" 3-claw chuck, 6" 2-claw chuck

How much does the Citizen Miyano BNE-51MYY cost?

Estimated price range

Est.$380,000 - $520,000

Our best estimate for a mill-turn / multi-tasking machine in this class — not a quote from Citizen Machinery. Configuration moves it a long way.

Overview

The Citizen Miyano BNE-51MYY is a fixed-headstock lathe with two spindles and two 12-station turrets, and both turrets have a Y axis. It works to a standard machining diameter of 51 mm, takes parts up to 195 mm long, and can carry a maximum of 24 rotary tools, driven at up to 6,000 rpm by a 4.0 kW motor.

The second Y axis is the reason to choose this model. Citizen describes the pair of Y-axis turrets, with front and back spindles, as allowing simultaneous left/right and up/down machining, including superimposed machining. In practice one turret can mill or cross-drill on the main spindle while the other does the same on the back spindle, and Citizen notes that tools can be allocated to either turret without being restricted by machining balance. Parts with milled features on both ends no longer queue behind a single Y-axis turret.

The main spindle motor is rated 18.5/15 kW (30min/cont.) and the back spindle 11/7.5 kW (15min/cont.); both run to 5,000 rpm. Listed workholding covers Hardinge S22, DIN177E and Hainbuch 51 collet chucks, or 6-inch 3-claw and 2-claw power chucks. Turning tools are 20 mm square and tool post holes 25 mm.

Feed rates are 20 m/min on X1, Z1, X3 and Z3, 18 m/min on X2 and Z2, and 12 m/min on both Y axes. The machine draws 47 kVA, stands 2,070 mm high, occupies W2,860×D2,190 mm and weighs 8,080 kg. The Miyano BNE-51MSY, by comparison, is listed at 90 mm machining length with 15/11 kW on its main spindle.

Full Specifications

Parameter	Value
Max Machining Length	195 mm
Standard Machining Diameter	51 mm dia.
Number of Spindles	2
Max Spindle Speed	5,000 rpm
Collet Chuck Type	Hardinge S22, DIN177E, HAINBUSH 51
Power Chuck Type	6" 3-claw chuck, 6" 2-claw chuck
Number of Tool Posts	2
Type of Tool Post	12st.Turret
Dimensions of Tools Used	20 mm Sq.
Dimensions of Tool Post Holes	25 mm dia.
Number of Installed Rotary Tools	max. 24
Rotating Speed of Rotary Tools	6,000 rpm
Feed Rate X1 Z1 X3 Z3 Axis	20 m/min
Feed Rate X2 Z2 Axis	18 m/min
Feed Rate Y1 Y2 Axis	12 m/min
Spindle Motor Sp1	18.5/15 kW(30min/cont.)
Spindle Motor Sp2	11/7.5 kW(15min/cont.)
Rotary Tools Motor	4.0 kW
Power Requirement	47 kVA
Machine Height	2,070 mm
Required Floor Surface Area	W2,860×D2,190 mm
Machine Weight	8,080 kg

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

Strengths & Limitations

Strengths

Both 12-station turrets have a Y axis, so off-centre work can run on the front and back spindles at the same time
Up to 24 rotary tools across the two turrets, driven at 6,000 rpm by a 4.0 kW motor
Main spindle motor of 18.5/15 kW (30min/cont.), against 15/11 kW on the Miyano BNE-51MSY
195 mm maximum machining length at a 51 mm standard machining diameter
Listed workholding includes Hardinge S22, DIN177E and Hainbuch 51 collets, or 6-inch 3-claw and 2-claw power chucks

Limitations

Y axes feed at 12 m/min, against 20 m/min on X1, Z1, X3 and Z3
Back spindle motor is 11/7.5 kW (15min/cont.), well below the 18.5/15 kW main spindle
Needs a 47 kVA supply and floor for 8,080 kg on W2,860×D2,190 mm
Both spindles stop at 5,000 rpm, which limits cutting speed on small diameters

Best For

Parts with milled or cross-drilled features on both ends Complex 51 mm parts finished complete in one cycle Overlapped front and back machining to shorten cycle times Parts up to 195 mm long that need many driven tools

Frequently Asked Questions

01 What do the two Y-axis turrets allow on the Miyano BNE-51MYY?

Citizen says the two Y-axis turrets, together with the front and back spindles, allow simultaneous left/right and up/down machining, including superimposed machining. Off-centre drilling and milling can therefore run on both spindles at once instead of waiting for one Y-axis turret.

02 How many rotary tools can the BNE-51MYY carry?

A maximum of 24 across the two 12-station turrets. Rotary tools run at up to 6,000 rpm on a 4.0 kW motor. Turning tools use 20 mm square shanks and the tool post holes are 25 mm in diameter.

03 What workholding does Citizen list for the BNE-51MYY?

Collet chucks in Hardinge S22, DIN177E and Hainbuch 51 types, and 6-inch power chucks in 3-claw and 2-claw form. The standard machining diameter is 51 mm on both spindles, which run to 5,000 rpm.

04 How does it differ from the Miyano BNE-51MSY?

The Miyano BNE-51MSY is listed with a 90 mm maximum machining length, a 15/11 kW main spindle, a 7.5/5.5 kW second spindle and 8,000 kg. The BNE-51MYY offers 195 mm, 18.5/15 kW and 11/7.5 kW, a Y axis on both turrets, and weighs 8,080 kg.

05 What power supply and space does the BNE-51MYY need?

A 47 kVA supply, a floor area of W2,860×D2,190 mm and 2,070 mm of height. The machine weighs 8,080 kg, so check the floor and the rigging route before delivery.