Nexturn BN-206
Key Specifications
Rapid Traverse
max bar capacity
max machining length
number of axes
main spindle speed
main spindle power
Overview
The Nexturn BN-206 is a 20mm bar capacity CNC Swiss-type automatic lathe from Nexturn, the South Korean precision machine tool manufacturer that has built one of the most competitive Swiss-type product lines in Asia outside Japan. The BN-206 occupies the entry tier of Nexturn's BN series — a 20mm Swiss-type designed for the high-volume production of small precision parts in medical, electronics, and automotive connector markets. At 20mm, the BN-206 competes in the most densely contested segment of the Swiss-type market, where Citizen, Star, Tsugami, and Hanwha all offer well-established platforms. Nexturn's positioning is competitive pricing with Fanuc control compatibility and a growing North American support infrastructure.
The BN-206 features a main spindle rated at up to 10,000 RPM with 3.7 kW of power, appropriate for the small-diameter bar work this machine targets. A sub-spindle rated at the same speed provides complete backworking capability, enabling parts to be fully finished in a single cycle without manual intervention. The machine offers C-axis on both main and sub-spindle for angular milling and drilling, and Y-axis enables off-center operations on both sides. With up to 20 tool positions across gang and turret-style tool slides, the BN-206 has sufficient tool density for most commercial small-precision parts.
The guide bushing system on the BN-206 is designed to the Swiss-type standard — the guide bushing supports the bar stock at the cutting zone, providing rigid workpiece support regardless of the part's length-to-diameter ratio. This is the fundamental advantage of Swiss-type machining: the ability to produce slender parts with diameters as small as 2mm to the full 20mm with consistent dimensional accuracy and surface finish throughout the machining zone. The BN-206 also supports a removable guide bushing configuration for non-guide-bushing mode, reducing material remnant waste on shorter part families.
Nexturn offers the BN-206 with Fanuc 32i-B CNC control, which aligns with the standard control ecosystem most contract shops in North America already program against. This control compatibility reduces the learning curve for shops adding the BN-206 as an additional Swiss-type machine to an existing Fanuc-based Swiss fleet. New BN-206 machines typically price between $130,000 and $200,000 fully configured with bar feeder, competing favorably against Citizen L20 and Star SR-20J configurations at equivalent specification. For shops entering the Swiss-type market or adding 20mm capacity, the BN-206 offers a cost-effective entry point with capable specifications.
Full Specifications
| Parameter | Value |
|---|---|
| Max Bar Capacity | 20 mm (0.787 in) |
| Max Machining Length | 200 mm (7.87 in) |
| Number Of Axes | 6-axis simultaneous (X1, Z1, Y1, X2, Z2, C1/C2) |
| Main Spindle Speed | 10,000 RPM |
| Main Spindle Power | 3.7 kW (5 hp) |
| Sub Spindle Speed | 10,000 RPM |
| Sub Spindle Power | 2.2 kW (3 hp) |
| C Axis | Both main and sub-spindle |
| Y Axis | Yes |
| Tool Positions | Up to 20 |
| Driven Tool Speed | 8,000 RPM |
| Guide Bushing | Yes (removable for non-guide bushing mode) |
| Rapid Traverse Rate | 30 m/min (1,181 ipm) |
| CNC Control | Fanuc 32i-B |
| Machine Weight | 1,800 kg (3,968 lb) |
Strengths & Limitations
Strengths
- Competitive pricing against Citizen L20 and Star SR-20J at comparable specification — typically 10-15% below Japanese equivalent machines — making the BN-206 accessible for shops with tighter capital budgets
- Fanuc 32i-B control ensures programming compatibility with the broader Swiss-type CAM ecosystem and easy integration into shops already running Fanuc-based CNC equipment
- Y-axis capability on both spindle sides enables off-center milling and drilling without secondary setups, supporting complex connector, medical, and automotive part geometries
- Removable guide bushing allows conversion to non-guide-bushing mode for shorter parts, reducing material waste per bar — particularly valuable with expensive titanium and stainless stock
- 10,000 RPM main and sub-spindle speeds provide adequate surface speed for stainless, brass, and aluminum small-diameter turning with good surface finish results
Limitations
- Nexturn's North American service and support network, while growing, is not yet as dense as Citizen's (Marubeni) or Star's (Methods Machine Tools) dealer networks — shops in some regions may experience longer on-site service response times
- 20 tool positions is on the lower end for complex parts — shops running parts with extensive milling, threading, and drilling requirements may find tool count limiting without frequent changeover
- Brand recognition in medical and aerospace qualification processes may require additional documentation compared to established Japanese Swiss brands
Best For
Frequently Asked Questions
01
Both are 20mm Swiss-type lathes targeting similar markets. The Citizen L20 has the advantage of Citizen's proprietary LFV (Low Frequency Vibration) chip-breaking technology, which is particularly beneficial for stringy stainless steels and titanium. The BN-206 is typically priced 10-15% below the Citizen L20 at comparable configuration and uses Fanuc 32i-B control vs Citizen's proprietary CINCOM control. Shops with existing Fanuc programming expertise may prefer the BN-206's control environment.
02
The BN-206 can machine parts up to 200mm (7.87 in) in length in a single cycle. For longer parts, bar pulling techniques or part reversal on the sub-spindle can extend effective machined length. The Z1 travel for the main spindle determines the maximum single-pass length, and parts requiring longer total machining length can be completed across main and sub-spindle operations.
03
Yes. The BN-206 supports a removable guide bushing configuration. Non-guide-bushing mode (also called fixed headstock mode) is advantageous for shorter parts where the guide bushing would waste material in the bar remnant. At 20mm bar diameter, the material waste difference between guide bushing and non-guide-bushing mode adds up in expensive materials, so the flexibility to switch modes is a practical production advantage.
04
The BN-206 is compatible with standard Swiss-type bar feeders rated for 20mm stock from LNS, IEMCA, and FMB Maschinenbau. LNS Sprint 120, IEMCA Boss 332, and similar magazine bar feeders are commonly paired with this machine. A 12-foot bar feeder is standard for production work, adding approximately $15,000-$25,000 to the total machine investment.
05
The BN-206 handles a full range of bar stock materials common in Swiss-type production: free-machining steels, austenitic stainless (303, 304, 316L), titanium alloys (Ti-6Al-4V), brass, aluminum alloys, and engineering plastics including PEEK, Delrin, and PTFE. For titanium and difficult alloys, high-pressure coolant (optional) significantly improves tool life and chip evacuation.
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