Citizen Miyano ANX-42SYY

$280,000 - $400,000 Updated 2025-03-15

Key Specifications

Max Spindle

6,000min-1

Spindle Power

11/7.5kW（10min/cont.）

Max Turn Length

430 mm (16.93 in)

max bar capacity

42 mm (1.65 in)

max turning diameter

200 mm (7.87 in)

main spindle speed

6,000 RPM

Overview

The Citizen Miyano ANX-42SYY is a dual-spindle, twin-turret fixed-headstock CNC turning center with dual Y-axes and built-in spindle motors for high-speed, high-precision mill-turn production from 42 mm bar stock. The ANX platform represents Citizen's premium approach to compact multi-tasking, with built-in motors on both spindles that eliminate belt-driven vibration and deliver faster acceleration/deceleration for improved surface finish and tighter tolerances.

Both spindles reach 6,000 RPM with 11/7.5 kW (15/10 hp) built-in motors. The built-in motor design shortens acceleration and deceleration times compared to belt-driven spindles, reducing cycle time on parts with frequent spindle speed changes and improving surface finish through reduced vibration. Both spindles accept 42 mm bar stock, ensuring full-diameter capability for backworking operations.

The twin 12-station turrets provide 24 tool positions, each accepting live tools running at 6,000 RPM with 2.2 kW (20 Nm) of rotary tool power. The dual Y-axis configuration — one per turret — adds 70 mm of off-center travel for milling and drilling features. The turrets use the same tool holders as the BNA series, enabling shops to share tooling between ANX and BNA machines. The Fanuc 31i-B control manages the twin-turret synchronization with superimposition capability.

Axis travels include Z1/X1/Y1 on the upper turret, Z2/X2 on the lower turret, and Z3/X3 on the sub-spindle, providing complete independent motion for true simultaneous machining. The maximum turning diameter is 200 mm with a maximum turning length of 430 mm. Rapid traverse rates keep repositioning time low across all axes.

At 6,250 kg with a footprint of 2,650 x 1,630 mm, the ANX-42SYY is larger than single-turret BNA variants but delivers substantially more simultaneous machining capability. The 165 mm chuck capacity on both spindles accommodates chucker work alongside bar-fed production.

The ANX-42SYY competes with the Nakamura-Tome WT-150II and Star SB-20RG in the premium compact twin-turret segment. Its built-in spindle motors and Fanuc control differentiate it from the Mitsubishi-controlled BNA/BND/BNE lineup. Typical applications include high-precision medical components, aerospace fittings, and automotive safety-critical parts where surface finish and concentricity tolerances demand the stability of built-in motor spindles.

Full Specifications

Parameter	Value
Max Bar Capacity	42 mm (1.65 in)
Max Turning Diameter	200 mm (7.87 in)
Max Turning Length	430 mm (16.93 in)
Main Spindle Speed	6,000 RPM
Main Spindle Power	11/7.5 kW (15/10 hp) built-in motor
Sub Spindle Speed	6,000 RPM
Sub Spindle Power	11/7.5 kW (15/10 hp) built-in motor
Upper Turret Stations	12
Lower Turret Stations	12
Total Tool Positions	24
Live Tool Speed	6,000 RPM
Live Tool Power	2.2 kW (20 Nm)
Y Axis Travel	70 mm
Number Of Y Axes	2 (dual Y)
Chuck Capacity	165 mm
Machine Weight	6,250kg
Floor Space	2,650 x 1,630 mm
CNC Control	Fanuc 31i-B
Model	ANX-42SYY
Max Machining Length	130mm
Standard Machining Diameter	42mm Dia.
Number Of Spindles	2
Max Spindle Speed	6,000min-1
Collet Chuck Type	DIN173E、HAINBUSH、H-S20
Power Chuck Type	5" Powerw chuck
Number Of Tool Posts	2
Type Of Tool Post	12st.Turret
Dimensions Of Tools Used	20mm Sq.
Dimensions Of Tool Post Holes	25mm Dia.
Number Of Installed Rotary Tools	Max.24
Rotating Speed Of Rotary Tools	6,000min-1
Feed Rate	X1, X2, X3 axis
Z1 Z2 Axis	24m/min
Y1 Y2 Axis	18m/min
Z3	30m/min
Spindle Motor Power	11/7.5kW（10min/cont.）
Rotary Tools Motor	2.2kW
Rated Power Consumption	34kVA
Load Operation Average Power	18.4kVA
Required Floor Surface Area	W2,650×D1,645mm
Sliding Headstock Type	A20
Bar Work	BNC42
Turning Machine	BNA42CY
High Precision Turning Machines	BNA42SY
Multi Station Machining Cell	MC20 III
Maximum Machining Length	130mm
Feed Rate X1 X2 X3 Axis	24m/min
Feed Rate Z1 Z2 Axis	24m/min
Feed Rate Y1 Y2 Axis	18m/min
Feed Rate Z3	30m/min
Inquiries	Feel free to get in touch with us by phone or online if you have any questions or need advice about any of our products or services.

Specifications sourced from cmj.citizen.co.jp — verified 2026-03-28

Strengths & Limitations

Strengths

Built-in spindle motors on both spindles eliminate belt vibration and reduce acceleration/deceleration time, delivering superior surface finish and tighter tolerances versus belt-driven competitors
Twin 12-station turrets with 24 total live tool positions at 6,000 RPM provide class-leading tooling density with true simultaneous independent machining on both spindles
Dual Y-axes — one per turret — enable complex off-center machining on both front and back of the part simultaneously, a capability rare in the 42 mm class
6,000 RPM matched spindles on both main and sub-spindle deliver balanced performance for front and back operations without spindle speed limitations on either end
Fanuc 31i-B control offers broad compatibility with existing shop CAM systems and post processors, unlike the Mitsubishi controls on other Miyano platforms
Tool holders are compatible with BNA series machines, allowing shops to share tooling inventory between ANX and BNA platforms

Limitations

Premium pricing of $280,000+ makes it one of the most expensive options in the 42 mm fixed-headstock class, approaching the cost of 51 mm and 65 mm platforms
6,250 kg weight and 2,650 x 1,630 mm footprint is substantially larger than single-turret BNA variants, requiring more floor space and foundation work
Dual Y-axis twin-turret programming is complex and requires experienced multi-path CNC programmers to optimize simultaneous machining sequences
2.2 kW (20 Nm) live tool power is adequate but not exceptional for heavy milling operations; shops doing extensive cross-milling may want more torque
Fanuc 31i-B control is different from the Mitsubishi controls used on other Miyano machines, potentially complicating training in shops running mixed Miyano platforms

Best For

High-precision medical implant manufacturers where built-in motor spindles deliver the surface finish and concentricity tolerances that belt-driven machines struggle to hold Aerospace connector and fitting production requiring true simultaneous dual-turret machining with dual Y-axes for complex angular features Automotive safety-critical component production where surface finish quality and dimensional consistency are paramount Shops standardized on Fanuc controls that want Miyano precision without adopting the Mitsubishi CNC platform used on BNA/BND/BNE machines High-volume production where the 24 live tool positions and dual-turret simultaneous cutting minimize cycle time on complex parts Contract manufacturers producing premium parts where the built-in motor advantage justifies the cost premium over belt-driven alternatives

Frequently Asked Questions

01 What does a new Citizen Miyano ANX-42SYY cost?

New ANX-42SYY machines typically range from $280,000 to $400,000 depending on tooling, high-pressure coolant, bar feeder, and automation options. The built-in spindle motors and twin 12-station turrets command a significant premium over belt-driven BNA variants. Used ANX machines are relatively scarce on the secondary market.

02 Why are built-in spindle motors better than belt-driven?

Built-in motors eliminate the mechanical connection between motor and spindle, removing belt-induced vibration that affects surface finish. They also provide faster acceleration and deceleration since there's no belt inertia to overcome. The practical benefit is better surface finish (especially at high RPM), improved concentricity, and reduced cycle time on parts with frequent speed changes.

03 How does the ANX-42SYY compare to the BNA-42GTY?

The GTY offers more total tool positions (up to 45 vs 24) and 3-tool simultaneous cutting via turret plus gang tools. The ANX provides twin 12-station turrets with dual Y-axes and built-in spindle motors. Choose the GTY for maximum tool count and 3-tool cutting; choose the ANX for built-in motor precision, dual Y-axis flexibility, and Fanuc control compatibility.

04 Does the ANX-42SYY use Fanuc or Mitsubishi control?

The ANX-42SYY uses a Fanuc 31i-B control, distinguishing it from most other Miyano machines that run Mitsubishi CNC. The Fanuc control offers broader CAM post processor compatibility and is more familiar to the majority of CNC programmers. This can be a significant advantage for shops already standardized on Fanuc.

05 Can the ANX-42SYY handle chucker work as well as bar stock?

Yes. The 165 mm chuck capacity on both spindles accommodates castings, forgings, and pre-cut blanks for chucker-style machining. The machine is equally capable as a bar-fed production center with a 42 mm bar feeder or as a chucker for second-operation work on larger blanks.

06 What is the maximum turning length on the ANX-42SYY?

The maximum turning length is 430 mm, which is substantially longer than the 100 mm on most BNA-42 variants. This extended length opens the machine to shaft-type components and longer fittings that would require a BND-51SY or larger on other Miyano platforms.