Citizen Miyano BNA-42SY5

$155,000 - $230,000 Updated 2026-03-19

Key Specifications

X Travel

140 mm (5.51 in)

max bar capacity sp1

42 mm (1.65 in)

max bar capacity sp2

34 mm (1.34 in), 42 mm optional

max machining length

100 mm (3.94 in)

main spindle speed

60 - 6,000 RPM

main spindle power

11 kW (15 hp)

Overview

The Citizen Miyano BNA-42SY5 is the fifth-generation dual-spindle, single-turret fixed-headstock CNC lathe with Y-axis, representing the current production model of the proven BNA-42SY platform. The SY5 designation confirms sub-spindle, Y-axis, and generation 5 refinements including updated control software, improved thermal management, and enhanced superimposition algorithms over earlier SY generations.

The main spindle (SP1) delivers 11 kW from 60 to 6,000 RPM, while the sub-spindle (SP2) reaches 5,000 RPM with 5.5 kW. The sub-spindle accepts bar up to 34 mm (42 mm optional) and provides independent Z2 travel for part pickup and backworking. The 12-station Y-axis turret accepts live tools at all positions running at 5,000 RPM with 2.8/1.0 kW of rotary tool power via independent clutch mechanisms.

Y-axis travel of 70 mm (+/-35 mm) enables off-center machining. Rapid traverse rates of 20 m/min on X, Z, and B axes with 12 m/min on Y keep repositioning time low. The 5-inch power chuck on SP1 handles both bar and chucker work. Maximum machining length is 100 mm per chucking. A tailstock option with MT2 Morse taper and 200 mm travel extends the machine to shaft-type components when needed.

At 3,650 kg with a floor space of 2,350 x 1,433 mm, the BNA-42SY5 is slightly lighter than earlier SY generations while maintaining the same compact footprint. Tank capacities of 235L coolant, 18L hydraulic, and 2L way lube support extended unattended operation.

The BNA-42SY5 is the natural choice for shops standardizing on the current-generation Miyano platform. The generation 5 improvements are incremental but meaningful for shops running lights-out production where thermal stability and superimposition precision directly impact part quality over long unattended runs. Medical, automotive, hydraulic, and electronic component manufacturers represent the core user base.

Full Specifications

Parameter	Value
Max Bar Capacity Sp1	42 mm (1.65 in)
Max Bar Capacity Sp2	34 mm (1.34 in), 42 mm optional
Max Machining Length	100 mm (3.94 in)
Main Spindle Speed	60 - 6,000 RPM
Main Spindle Power	11 kW (15 hp)
Sub Spindle Speed	50 - 5,000 RPM
Sub Spindle Power	5.5 kW (7.5 hp)
Turret Stations	12 (Y-axis turret)
Live Tool Stations	12 (independent clutch)
Live Tool Speed	5,000 RPM
Live Tool Power	2.8/1.0 kW
X-Axis Travel	140 mm (5.51 in)
Travel Z1	285 mm (11.22 in)
Travel Z2	360 mm (14.17 in)
Y Axis Travel	70 mm (+/-35 mm)
Rapid Traverse Xzb	20 m/min (787 ipm)
Rapid Traverse Y	12 m/min (472 ipm)
Power Chuck Sp1	5 inch
Power Chuck Sp2	4 inch
Tailstock Travel	200 mm (MT2)
Machine Weight	3,650 kg
Floor Space	2,350 Ã 1,433 mm
Coolant Capacity	235 L
CNC Control	Mitsubishi CNC
Item	BNA-42SY5
Max Bar Diameter	â42 mm / â34 mm (â42 opt.)
Standard Machining Length	100 mm
Spindle Speed	6,000 / 5,000 minâ»Â¹
Power Chuck Size	5" / 4"
Turret Type Stations	12 Station Y-Axis Turret
Max Installed Rotary Tools	12 Tools (Independent Clutch)
Rotary Tool Speed	5,000 minâ»Â¹
Dimensions Of Tools	20 mm sq. / 25 mm dia.
Drilling Tapping Capacity	Max 10 dia. / Max M8 x 1.25
Rapid Feed Rate	20 m/min / 12 m/min
Slide Thrust	4.3 kN / 0.57 kN
Max Travel Morse Taper	200 mm / MT2
Spindle Motor Sp1 Sp2	11 kW / 5.5 kW
Rotary Tool Motor	2.8 / 1.0 kW
High Pressure Coolant Motor	1.1 kW (60Hz)
Tank Capacities	235L / 18L / 2L

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

Strengths & Limitations

Strengths

Current fifth-generation design brings refined thermal management and superimposition algorithms for improved accuracy over long unattended production runs
12-station turret with independent clutch live tools at all positions provides maximum tooling density and flexibility for complex part programs
Y-axis travel of 70 mm enables off-center milling, drilling, and tapping for complex features including flats, keyways, and hexagonal profiles
Optional 42 mm sub-spindle eliminates the standard 34 mm limitation for full-diameter backworking on all parts within the bar capacity range
Tailstock option with MT2 Morse taper and 200 mm travel extends capability to shaft-type components beyond the standard 100 mm machining length
235L coolant tank capacity supports extended lights-out operation without coolant level concerns

Limitations

34 mm standard sub-spindle capacity requires the optional upgrade to machine full 42 mm diameter on the back end
100 mm maximum machining length limits the machine to compact parts unless the tailstock option is fitted
Single turret shared between two spindles means tool allocation must be carefully optimized between front and back operations
5,000 RPM live tool speed is adequate but below the 6,000 RPM available on the MSY variant for more demanding cross-milling work

Best For

Medical device manufacturers producing implant components, bone screws, and instrument fittings requiring complete front-and-back machining from 42 mm bar Automotive precision fitting production where the current-generation platform ensures consistent quality across high-volume lights-out runs Hydraulic connector and coupling manufacturers needing Y-axis milling capability for cross-holes and flats in a compact production cell Shops standardizing on current-generation Miyano equipment for warranty coverage, spare parts availability, and control software support Contract manufacturers needing a proven, current-production dual-spindle bar machine for mixed-part production

Frequently Asked Questions

01 What does a new Citizen Miyano BNA-42SY5 cost?

New BNA-42SY5 machines typically range from $155,000 to $230,000 depending on tooling, bar feeder, high-pressure coolant, and parts catcher configuration. The SY5 carries a modest premium over remaining SY3/SY4 inventory for the latest-generation improvements.

02 What changed from the BNA-42SY3 to the SY5?

The SY5 generation brings improved thermal management, updated superimposition control algorithms, refined turret indexing, and updated control software. The core mechanical platform is evolutionary rather than revolutionary. Shops upgrading from SY3 or SY4 machines will find the programming and operation nearly identical.

03 Can the BNA-42SY5 run with a tailstock for shaft work?

Yes, an optional tailstock with MT2 Morse taper and 200 mm travel is available. This extends the machine beyond its standard 100 mm bar machining length for between-centers shaft work. Most shops order the tailstock as insurance even if their primary work is short bar parts.

04 What bar feeders are compatible with the BNA-42SY5?

The BNA-42SY5 works with standard magazine-style bar feeders in the 42 mm class including the Edge M-542, LNS Quick Load Servo 80, and Iemca Boss 542. The bar feeder interface is consistent across BNA-42 generations.