Citizen Cincom B20

$180,000 - $240,000 Updated 2026-03-17

Key Specifications

Max Bar Diameter

20 mm

Main Spindle Speed

10,000 RPM

Sub-Spindle Speed

10,000 RPM

Number of Axes

Tool Stations

Driven Tool Speed

6,000 RPM

Overview

The Citizen Cincom B20 is a high-performance 20mm Swiss-type sliding headstock automatic lathe designed for high-volume precision bar work. Built around Citizen's proven guide-bushing architecture, the B20 delivers exceptional surface finish and dimensional accuracy on slender workpieces in medical, dental, and electronics applications where tolerances measured in microns are non-negotiable.

The machine features a compact footprint that belies its production capability. With a main spindle capable of reaching 10,000 RPM and a fully capable sub-spindle for complete back-working, the B20 eliminates secondary operations and reduces part cycle times. The LFV (Low Frequency Vibration) cutting technology, a Citizen hallmark, breaks chips into manageable pieces during difficult materials like stainless steel, titanium, and superalloys, preventing bird-nesting and reducing coolant consumption.

Citizen's OSP-P300S control system provides an intuitive operating environment with conversational programming and full G-code compatibility. The control integrates seamlessly with Citizen's CINCOM ASSISTANT software for offline programming and process simulation, reducing machine downtime during changeovers. Tool capacity includes up to 38 tools in the standard configuration, with driven tools available on multiple positions for complete machining in a single setup.

As part of the Cincom family, the B20 benefits from Citizen's decades of refinement in Swiss-type technology. The machine is well-supported globally with a broad network of applications engineers and spare parts availability, making it a reliable choice for production environments where uptime is critical.

Full Specifications

Parameter	Value
Max Bar Diameter	20 mm
Main Spindle Speed	10,000 RPM
Sub-Spindle Speed	10,000 RPM
Number Of Axes	7
Tool Stations	38
Driven Tool Speed	6,000 RPM
Max Part Length	200 mm
Collet Chuck Type	5C equivalent
Control	Citizen OSP-P300S
Machine Weight	Approx. 1,800 kg
Footprint (W X D)	1,350 x 1,450 mm
Cnc	CNC自動旋盤がどんな機能や特徴を持っているか解説。
Creation	当社の情報誌「CREATION」のバックナンバーを掲載。

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

Strengths & Limitations

Strengths

LFV chip-breaking technology excels in difficult materials like titanium and stainless steel
7-axis simultaneous machining enables complex parts in a single setup
38-tool capacity reduces changeover frequency in high-mix production
Proven OSP-P300S control with conversational programming reduces setup time
Strong global support network with fast spare parts availability

Limitations

20mm bar capacity limits applicability to smaller diameter workpieces
Higher purchase price compared to some Asian-market Swiss-type competitors
LFV programming adds a learning curve for shops new to Citizen technology

Best For

Medical implant and instrument components in titanium and stainless steel Electronics connectors and precision pins in copper and brass alloys Dental components requiring sub-micron tolerances High-volume hydraulic and pneumatic fittings in 20mm and under

Frequently Asked Questions

01 What is LFV technology on the Citizen Cincom B20?

LFV (Low Frequency Vibration) is Citizen's patented chip-breaking technology that oscillates the cutting tool at a programmed frequency and amplitude during turning, mechanically breaking chips into short segments. This is especially valuable when machining titanium, Inconel, and other stringy materials where conventional chip-breaking is unreliable.

02 Can the Cincom B20 run without a guide bushing?

Yes. Citizen offers a guide-bushing-less (GBL) option for the B20, which reduces bar remnant length and lowers material waste. GBL mode is particularly useful for short parts or expensive materials, though it may reduce rigidity on longer, slender workpieces.

03 How does the B20 compare to the Cincom L20?

The B20 and L20 share the same 20mm bar capacity but differ in configuration. The L20 is a larger, more tooling-intensive platform suited to complex parts requiring more tool stations. The B20 offers a more compact footprint and is optimized for high-volume simpler geometries where floor space is at a premium.

04 What materials is the Cincom B20 best suited for?

The B20 handles a broad range of bar stock materials including free-machining steels, stainless steels (303, 304, 316), titanium alloys (Ti-6Al-4V), brass, aluminum, and engineering plastics. LFV is particularly valuable for titanium and austenitic stainless.

05 What is the typical lead time for a new Citizen Cincom B20?

Lead times vary by configuration and region but typically range from 12 to 24 weeks from order placement. Shops with urgent requirements should consult Citizen's regional distributor for demonstrator or used-machine availability.