Citizen Miyano BNA-42S

$120,000 - $180,000 Updated 2026-03-19

Key Specifications

X Travel

135 mm (5.31 in)

max bar capacity sp1

42 mm (1.65 in)

max bar capacity sp2

34 mm (1.34 in)

max machining length

100 mm (3.94 in)

main spindle speed

60 - 6,000 RPM

main spindle power

7.5/5.5 kW (10/7.5 hp)

Overview

The Citizen Miyano BNA-42S is a dual-spindle, single-turret fixed-headstock CNC lathe built for complete front-and-back machining of bar stock up to 42 mm diameter. The S designation indicates a sub-spindle configuration without Y-axis, making this the most straightforward dual-spindle machine in the BNA-42 lineup — ideal for shops that need done-in-one turning without the added complexity of milling interpolation.

The main spindle (SP1) runs from 60 to 6,000 RPM with 7.5/5.5 kW (10/7.5 hp) of power, while the sub-spindle (SP2) reaches 5,000 RPM with 5.5/3.7 kW (7.5/5 hp). The sub-spindle accepts parts up to 34 mm diameter and travels independently on a B-axis (Z2) with 310 mm of stroke, enabling synchronized part pickup and backworking operations without manual intervention.

The 8-station turret with half-indexing mechanism effectively doubles tool positions to 16, with all 8 stations accepting driven tools running at up to 5,000 RPM with 2.8/1.0 kW of rotary tool power. While there is no Y-axis for off-center milling, the driven tools handle on-center cross-drilling, tapping, and simple milling operations. Superimposition control synchronizes sub-spindle movement with turret positioning to overlap front and back operations.

Axis travels measure 135 mm on X and 235 mm on Z1, with 310 mm on the sub-spindle B-axis (Z2). Maximum machining length is 100 mm per chucking. The machine weighs just 2,800 kg with a floor space requirement of 2,150 x 1,290 mm — the most compact footprint in the BNA-42 family, making it the go-to choice for shops with tight floor plans.

The BNA-42S fills the role of a high-productivity dual-spindle turning center for parts that primarily need turning, facing, grooving, threading, and on-center drilling from both ends. Automotive fittings, hydraulic connectors, plumbing components, and threaded fasteners that require front-and-back operations but minimal milling are the sweet spot. For shops that later need Y-axis capability, the step up to the BNA-42SY adds off-center machining without changing platform.

Full Specifications

Parameter	Value
Max Bar Capacity Sp1	42 mm (1.65 in)
Max Bar Capacity Sp2	34 mm (1.34 in)
Max Machining Length	100 mm (3.94 in)
Main Spindle Speed	60 - 6,000 RPM
Main Spindle Power	7.5/5.5 kW (10/7.5 hp)
Sub Spindle Speed	50 - 5,000 RPM
Sub Spindle Power	5.5/3.7 kW (7.5/5 hp)
Turret Stations	8 (half-indexing for 16 effective positions)
Live Tool Stations	8
Live Tool Speed	5,000 RPM
Live Tool Power	2.8/1.0 kW
X-Axis Travel	135 mm (5.31 in)
Travel Z1	235 mm (9.25 in)
Travel Z2	310 mm (12.20 in)
Rapid Traverse Xz	20 m/min (787 ipm)
Power Chuck Sp1	5 inch
Machine Weight	2,800 kg (6,173 lb)
Floor Space	2,150 x 1,290 mm
Machine Height	1,660 mm
CNC Control	Mitsubishi CNC
Maximum Machining Diameter Of Bar Work	SP1/SP2
Power Chuck	SP1/SP2
Spindle Motor	SP1
Sp2	50 – 5,000min-1
Spindle Speed Range	SP1
Slide Stroke	X axis
Z Axis	235mm
B Axis	310mm

Specifications sourced from citizenmachinery.co.uk — verified 2026-03-28

Strengths & Limitations

Strengths

Most compact footprint in the BNA-42 family at 2,150 x 1,290 mm, fitting into tight shop layouts where larger dual-spindle machines simply will not go
Dual-spindle architecture with independent Z2 axis enables complete front-and-back machining from bar stock in a single cycle, eliminating second-operation handling
Half-indexing turret mechanism effectively doubles the 8 physical stations to 16 tool positions, providing strong tooling density for a compact machine
All 8 turret stations accept driven tools at 5,000 RPM for on-center cross-drilling, tapping, and simple milling without Y-axis complexity
Lightest machine in the BNA-42 lineup at 2,800 kg, reducing foundation requirements and simplifying installation
Superimposition control overlaps front and back operations on the single turret, reducing cycle times on parts with significant backworking

Limitations

No Y-axis capability limits the machine to on-center drilling and milling only — flats, keyways, and hexagonal profiles require stepping up to the SY variant
34 mm sub-spindle capacity is smaller than the 42 mm main spindle, restricting full-diameter backworking on larger parts
100 mm maximum machining length restricts the machine to short, compact parts only
7.5/5.5 kW main spindle power is the lowest in the BNA-42 range, limiting aggressive roughing on harder materials at full bar diameter

Best For

Shops needing a compact dual-spindle turning center for high-volume production of simple turned parts from 42 mm bar stock Automotive fitting and connector manufacturers producing threaded components with front-and-back features that are primarily turning operations Hydraulic and plumbing component production where cross-drilling is on-center and Y-axis milling is not required Job shops adding their first dual-spindle bar-fed machine where the simpler no-Y-axis configuration reduces the programming learning curve High-volume fastener and fitting production where cycle time benefits from dual-spindle overlap outweigh the need for off-center milling

Frequently Asked Questions

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

New BNA-42S machines typically range from $120,000 to $180,000 depending on tooling configuration, bar feeder, and parts catcher. This is the most affordable machine in the BNA-42 dual-spindle lineup, positioned below the SY, MSY, and DHY variants. Used BNA-42S machines from 2014-2020 sell for $50,000-$100,000 depending on hours and condition.

02 How does the BNA-42S differ from the BNA-42SY?

The SY adds Y-axis travel of 70 mm for off-center milling, drilling, and tapping. The BNA-42S has no Y-axis and is limited to on-center driven tool operations. The SY also has a 12-station turret versus the S model's 8-station half-indexing turret. Choose the S for primarily turning work; choose the SY when parts require flats, keyways, or off-center features.

03 Can the BNA-42S do milling operations?

Yes, but only on-center. All 8 turret stations accept driven tools at 5,000 RPM for cross-drilling, tapping, and simple on-center milling. Without a Y-axis, the machine cannot produce off-center features like flats or keyways. For most turned parts with basic cross-holes, the on-center driven tools are sufficient.

04 What bar feeder works with the BNA-42S?

The BNA-42S is compatible with magazine-style bar feeders from Edge Technologies, LNS, and Iemca in the 42 mm capacity class. The Edge M-542 and LNS Quick Load Servo 80 are common pairings for lights-out production.