Citizen Machinery Mill-Turn / Multi-Tasking Machines

Citizen Miyano BND-51SY2

Est. $200,000 - $290,000 Specs verified 2026-10-03 · cmj.citizen.co.jp Updated 2026-10-03

Image: citizenmachinery.co.uk, Citizen Machinery

Key Specifications

maximum machining diameter of bar work

51 mm dia.

maximum machining length bar

320 mm

type of turret

12St.Turret

slide stroke x axis

175 mm

slide stroke z axis

435 mm

slide stroke y axis

+40 mm/-35 mm

How much does the Citizen Miyano BND-51SY2 cost?

Estimated price range

Est.$200,000 - $290,000

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 BND-51SY2 is a fixed-headstock CNC lathe for bar up to 51 mm in diameter, built around a single 12-station turret that has a Y axis and can carry a revolving tool in every station. The main spindle runs from 50 to 5,000 rpm on a spindle motor rated 15/11 kW, and Citizen gives a maximum machining length of 320 mm for bar work.

That 320 mm figure is what sets the machine apart from short-part bar lathes. With 435 mm of Z stroke on the turret slide, shafts, pins and spindles can be turned from the bar in one setup as long as they stay within the 51 mm capacity. X stroke is 175 mm. The Y axis moves +40 mm/-35 mm, which covers cross holes, off-centre drilling and flats on parts of this diameter but not wide milled pockets.

Tool holding is the usual turret-lathe pattern: 20 mm square shanks for turning tools and 25 mm bores for boring bars and drill holders. Because all 12 stations accept revolving tools, a part with several milled or cross-drilled features can be tooled without a separate live-tool block, though every driven tool still occupies a station that a turning tool could otherwise use.

Citizen's table also gives a 530 mm stroke for an axis it labels B, but no back-spindle speed, motor or chuck figure. Anyone planning to finish the cut-off end of a part on this machine should ask Citizen what the B axis carries before relying on it.

Next to the Miyano BNA-42CY, which runs to 6,000 rpm and weighs 3,220 kg, the BND-51SY2 has the lower top speed at 5,000 rpm and is the heavier machine at approximately 4,500 kg.

Full Specifications

Parameter	Value
Maximum Machining Diameter of Bar Work	51 mm dia.
Maximum Machining Length Bar	320 mm
Type of Turret	12St.Turret
Slide Stroke X Axis	175 mm
Slide Stroke Z Axis	435 mm
Slide Stroke Y Axis	+40 mm/-35 mm
Slide Stroke B Axis	530 mm
Shank Height of Square Turning Tool	20 mm Sq.
Tool Hole Diameter	25 mm dia.
Maximum Number of Revolving Tool	12
Main Spindle Speed Range	50 - 5,000 rpm
Spindle Motor 30min Cont	15/11 kW
Machine Weight Approx	4,500 kg

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

Strengths & Limitations

Strengths

51 mm bar capacity with a maximum machining length of 320 mm for bar work, enough for long shafts and pins
All 12 stations of the turret can take revolving tools
Y-axis stroke of +40 mm/-35 mm on the turret for cross holes, flats and off-centre drilling
435 mm of Z stroke and 175 mm of X stroke on the turret slide
Spindle motor rated 15/11 kW, with a speed range of 50 to 5,000 rpm

Limitations

Top spindle speed is 5,000 rpm, against 6,000 rpm on the Miyano BNA-42CY, which limits surface speed on small diameters
One turret only: turning, drilling and milling all queue on the same slide
The table does not say what the 530 mm B axis carries and gives no back-spindle figures, so back-end work must be confirmed with Citizen
The Y axis offers +40 mm/-35 mm, which limits how wide a milled flat or slot can be

Best For

Long shafts and pins turned from bar up to 51 mm Bar parts up to 320 mm long machined in one setup Turned parts with cross holes, flats or off-centre drilling Jobs that need many driven tools on one turret

Frequently Asked Questions

01 What bar size and part length does the Miyano BND-51SY2 handle?

Citizen gives a maximum machining diameter of 51 mm for bar work and a maximum machining length of 320 mm. The turret slide strokes are 175 mm in X and 435 mm in Z, so long parts can be turned from the bar without re-chucking.

02 How many driven tools can the turret carry?

The turret has 12 stations and Citizen lists a maximum of 12 revolving tools, so every station can be a driven one. Turning tools use 20 mm square shanks and the tool holes are 25 mm in diameter.

03 What does the Y axis add on the BND-51SY2?

The turret's Y stroke is +40 mm/-35 mm. That lets driven tools drill and mill off the spindle centreline, for cross holes, flats and keyways, without a second machine. It is not long enough for wide milled faces.

04 Does the Miyano BND-51SY2 machine the back of the part?

Citizen's table lists a 530 mm stroke for an axis labelled B but gives no back-spindle speed, motor or chuck size. Ask Citizen what the B axis carries and what back-end work it supports before quoting jobs that need the cut-off end finished.

05 How does it compare with the Miyano BNA-42CY?

The Miyano BNA-42CY runs from 60 to 6,000 rpm and weighs 3,220 kg. The BND-51SY2 runs from 50 to 5,000 rpm and weighs approximately 4,500 kg, with 51 mm bar capacity and 320 mm machining length.