Citizen Machinery CNC Lathes / Turning Centers

Citizen Miyano BNE-51

Est. $150,000 - $220,000 Possible older model Updated 2026-10-03

This model was not found in Citizen Machinery's current lineup when we checked on 2026-10-03 (lineup page). It may be a superseded or older model; the specifications below are as we last recorded them.

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

Key Specifications

Max Turn Length

130 mm (5.12 in)

max bar capacity

51 mm (2.0 in)

max turning diameter

250 mm (9.84 in) chuck work

main spindle speed

5,000 RPM

sub spindle speed

5,000 RPM

live tool speed

6,000 RPM

How much does the Citizen Miyano BNE-51 cost?

Estimated price range

Est.$150,000 - $220,000

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 Miyano BNE-51 is a twin-spindle, twin-turret fixed-headstock lathe sized for 51 mm (2.0 in) bar: the main spindle takes bar work to 51mm Dia., the second spindle to 42mm Dia., and both run to 5,000 RPM. It is not in Citizen's current lineup, so expect to buy one second-hand.

Most of the power is on the main side. Its motor is listed as 15/11kW, against 5.5/3.7kW for the second spindle, which means roughing and large-diameter facing are main-spindle jobs and the second spindle is for finishing the cut-off end, back drilling and chamfers. Chuck work is listed to 250 mm (9.84 in) in diameter; the hydraulic chucks are 6" on the main spindle and 5" on the second.

Two 12-station turrets carry up to 12+12 revolving tools, running to 6,000 RPM. The first turret has a ±40mm Y stroke over 380mm of Z1, and the second spindle moves 450mm on its R axis. Check that travel against the part length and chuck overhang when planning the transfer from the main spindle.

Rapids are 20 m/min on X and 24 m/min on Z. The machine weighs 7,800kg, stands 1,925mm high and needs 2,690×2,160mm of floor; the control is a Mitsubishi M80. For the same 250 mm (9.84 in) chuck-work rating at 5,300 kg, with an M80W dual-path control, the Miyano BNJ-51 is the lighter alternative.

Full Specifications

Parameter	Value
Max Bar Capacity	51 mm (2.0 in)
Max Turning Diameter	250 mm (9.84 in) chuck work
Max Turning Length	130 mm (5.12 in)
Main Spindle Speed	5,000 RPM
Sub Spindle Speed	5,000 RPM
Live Tool Speed	6,000 RPM
Spindle Motor	11 kW (15 hp)
Number of Axes	5 (X1, Z1, Y1, X2, Z2)
Turret Positions	12 (with live tooling)
Rapid Traverse X	20 m/min
Rapid Traverse Z	24 m/min
Machine Weight	7,800kg
CNC Control	Mitsubishi M80 (Citizen Miyano)
Items	BNE-42S6
Sp2	5.5/3.7kW
Type of Turret	HD1
Slide Stroke	HD1
Z1 Axis	380mm
Z2 Axis	175mm
R Spindle Travel	450mm
Shank Height of Square Turning Tool	20mm Sq.
Tool Hole Diameter	25mm Dia.
Maximum Number of Revolving Tools	12+12
Machine Height	1,925mm
Floor Space	2,690×2,160mm
Power Chuck Sp1 Sp2	6"/5" hydraulic drive
Maximum Machining Diameter of Bar Work Sp1	51mm Dia.
Maximum Machining Diameter of Bar Work Sp2	42mm Dia.
Standard Turning Length Sp1	90mm
Type of Turret Hd1	12St.Turret
Type of Turret Hd2	12St.Turret
Slide Stroke Hd1	±40mm
Slide Stroke Hd2	175mm
Main Spindle Speed Range Sp1	5,000min-1
Main Spindle Speed Range Sp2	5,000min-1
Spindle Motor Sp1	15/11kW
Spindle Motor Sp2	5.5/3.7kW

Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.

Strengths & Limitations

Strengths

Bar work to 51mm Dia. on the main spindle and 42mm Dia. on the second spindle
Main spindle motor listed at 15/11kW
Two 12-station turrets with up to 12+12 revolving tools at 6,000 RPM
Chuck work to 250 mm (9.84 in) in diameter with a 6" hydraulic chuck
Second spindle travels 450mm on its R axis

Limitations

The second spindle has a 5.5/3.7kW motor, so back-side cuts must stay light
Both spindles stop at 5,000 RPM, which caps surface speed on small features
Y stroke is listed for the first turret only (±40mm)
7,800kg on 2,690×2,160mm, against 5,300 kg for the Miyano BNJ-51

Best For

Bar parts up to 51mm Dia. finished on both ends Heavy turning on the main spindle's 15/11kW motor Jobs using many tools across two 12-station turrets Chuck work up to 250 mm (9.84 in) in diameter

Frequently Asked Questions

01 What bar size does the Miyano BNE-51 handle?

Bar work is listed to 51mm Dia. on the main spindle and 42mm Dia. on the second, with hydraulic chucks of 6" and 5". Chuck work is listed to 250 mm (9.84 in) in diameter, and both spindles run to 5,000 RPM.

02 How is the BNE-51 different from the Miyano BNE-42?

The Miyano BNE-42 is listed for chuck work to 200 mm (7.87 in) in diameter, against 250 mm (9.84 in) on the BNE-51. Both weigh 7,800kg, run revolving tools to 6,000 RPM, rapid at 20 m/min on X and 24 m/min on Z and use a Mitsubishi M80 control.

03 How does it compare with the Miyano BNJ-51?

Both are listed for chuck work to 250 mm (9.84 in). The Miyano BNJ-51 weighs 5,300 kg and runs a Mitsubishi M80W dual-path control; the BNE-51 weighs 7,800kg, has a Mitsubishi M80 and carries two 12-station turrets.

04 What motors drive the two spindles?

The main spindle motor is listed at 15/11kW and the second spindle motor at 5.5/3.7kW. That split puts the roughing on the main spindle. Revolving tools on both turrets run to 6,000 RPM.