Citizen Miyano BNC-42
Key Specifications
max bar capacity
max machining length
main spindle speed
spindle motor
turret stations
turret tool size
Overview
Compact fixed-headstock CNC lathe for 42mm chucking. 8-station turret with 0.2s indexing via curvic coupling. Spindle: 60-6,000 RPM, 7.5/5.5 kW. X: 135mm, Z: 235mm, 175mm max length.
Optional live tooling: up to 8 revolving tools at 50-5,000 RPM, 2.8/1.0 kW. Multiple chuck/collet options (5/6-inch power chuck, HARDINGE S20, DIN173E, B&S #22D, JPN34). 2,400 kg, 2,272x1,270mm footprint.
Full Specifications
| Parameter | Value |
|---|---|
| Max Bar Capacity | 42 mm (1.65 in) |
| Max Machining Length | 175 mm (6.89 in) |
| Main Spindle Speed | 60 - 6,000 RPM |
| Spindle Motor | 7.5/5.5 kW (10/7.5 hp) |
| Turret Stations | 8 |
| Turret Tool Size | 20 mm square |
| Turret Indexing Time | 0.2 sec/station |
| Live Tools | Up to 8 (optional) |
| Live Tool Speed | 50 - 5,000 RPM |
| Live Tool Power | 2.8/1.0 kW |
| X Axis Stroke | 135 mm |
| Z Axis Stroke | 235 mm |
| Chuck Options | 5/6 in power chuck; S20, DIN173E, B&S #22D, JPN34 |
| Floor Space | 2,272×1,270mm |
| Machine Height | 1,686 mm |
| Machine Weight | 2,400kg |
| CNC Control | Mitsubishi M80 (Citizen Miyano) |
| Items | BNC-42C7 |
| Machining Capacity And Chuck System | Maximum Machining Diameter of Bar Work |
| Power Chuck | SP1 |
| Collet Chuck Type | SP1 |
| Spindle | Spindle Nose |
| Spindle Motor15min Rating Cont | SP1 |
| Spindle Speed Range | SP1 |
| Turret | Type of Turret |
| Shank Height Of Square Turning Tool | 20mm Sq. |
| Diameter Of Drill Shank | 25mm Dia., 32mm Dia. |
| Slide Stroke | X axis |
| Z Axis | 235mm |
| Turret Indexing Clamp Method | AC Servo motor &curvic coupling |
| Indexing Time | 0.2Sec./1St. |
| Revolving Tools | Maximum Number of Revolving Tool |
| Tool Spindle Speed Range | 50 - 5,000 min-1 |
| Revolving Tool Motor | 2.8/1.0kW |
| Machine Dimensions | Floor Space |
| Sliding Headstock Type | A20 |
| Bar Work | BNC42 |
| Turning Machine | BNA42CY |
| High Precision Turning Machines | BNA42S |
| Multi Station Machining Cell | MC20 III |
| Maximum Machining Diameter Of Bar Work Sp1 | 42mm Dia. |
| Maximum Machining Length | *175mm |
| Power Chuck Sp1 | 5", 6" Hollow chuck |
| Collet Chuck Type Sp1 | HARDINGE S20, DIN173E, B&S#22D, JPN34 |
| Spindle Nose Sp1 | Special Flat Type |
| Spindle Motor15min Rating Cont Sp1 | 7.5/5.5kW |
| Spindle Speed Range Sp1 | 60 - 6,000 min-1 |
| Type Of Turret | 8St.Turret |
| Slide Stroke X Axis | 135mm |
| Slide Stroke Z Axis | 235mm |
| Maximum Number Of Revolving Tool | 8 |
| 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
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Limitations
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Best For
Frequently Asked Questions
01
A new Citizen Miyano BNC-42 typically costs between $80,000 and $120,000 depending on configuration and tooling options. Used BNC-42 machines from 2015-2020 can be found in the $40,000-$70,000 range depending on condition, hours, and included tooling.
02
The BNC-42 is a basic 2-axis chucking lathe focused on pure turning operations, while the BNE-42 adds live tooling capability and potentially a Y-axis or sub-spindle for more complex multi-operation parts. The BNE is the enhanced version for shops needing milling, drilling, and tapping in addition to turning.
03
Yes, the BNC-42 can run unattended when equipped with a bar feeder. The combination of reliable Citizen controls, thermal stability, and consistent tool life make it well-suited for lights-out production of simple turned parts.
04
The BNC-42 is built to a higher precision standard with tighter geometric tolerances and better thermal stability, but costs significantly more than the Haas ST-10. The Haas offers more turning length and a larger working envelope. Choose the BNC-42 for precision-critical parts; choose the Haas for general-purpose turning where cost matters more than micron-level accuracy.
05
The BNC-42 uses a Mitsubishi M80 CNC control customized with Citizen Miyano's proprietary software. It supports both conversational programming and standard G-code, making it accessible to operators of varying experience levels.
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