Citizen Cincom L20 Swiss-Type Lathe

$150,000 - $230,000 Updated 2026-03-16

Key Specifications

Max Bar Capacity

20 mm (0.787 in)

Headstock Type

Sliding headstock with guide bushing

Max Turning Length

200 mm

Front Spindle Speed

Up to 10,000 RPM

Back Spindle Speed

Up to 8,000 RPM

Front Gang Tools

Up to 20 positions

Overview

The Citizen Cincom L20 is one of the most widely installed Swiss-type CNC automatic lathes in the world, designed for high-volume production of precision turned parts up to 20mm diameter. The sliding headstock with guide bushing system provides exceptional rigidity at the cutting point regardless of workpiece length, enabling tight tolerances on long slender parts that would deflect on a conventional lathe. The L20 features simultaneous front and back machining with overlapping operations — while one gang tool is cutting the front face, the back-work spindle can be drilling, threading, or turning the opposite end. Citizen's LFV (Low Frequency Vibration) cutting technology interrupts the chip automatically to prevent stringy chip problems on difficult materials like stainless steel and titanium. The L20 is a dominant machine in medical device, dental, electronic connector, and precision fastener production.

Full Specifications

Parameter	Value
Max Bar Capacity	20 mm (0.787 in)
Headstock Type	Sliding headstock with guide bushing
Max Turning Length	200 mm
Front Spindle Speed	Up to 10,000 RPM
Back Spindle Speed	Up to 8,000 RPM
Front Gang Tools	Up to 20 positions
Back-Work Spindle	Yes (full contouring)
LFV Vibration Cutting	Standard
Control	Citizen CINCOM OSP-P300S
Machine Footprint	Approx. 1800 x 1200 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

Guide bushing provides exceptional rigidity for long slender parts
LFV chip breaking prevents stringy chips in stainless and titanium
Simultaneous front/back machining for very short cycle times
One of the most supported Swiss lathe platforms globally
Large aftermarket tooling ecosystem and application support

Limitations

Guide bushing requires bar stock tolerance within tight limits
20mm bar capacity limits to small part families
Higher tooling complexity than conventional lathes

Best For

Medical device, dental implant, electronic connector, and precision fastener manufacturers requiring high-volume production of complex turned parts up to 20mm diameter with tight tolerances.

Frequently Asked Questions

01 What is LFV cutting technology on the Citizen L20?

LFV (Low Frequency Vibration) is a Citizen-patented cutting technology that oscillates the cutting tool with a controlled vibration synchronized to the spindle rotation. This interrupts the chip at regular intervals, breaking it into short chips instead of the long stringy chips that cause problems in stainless steel and other difficult materials.

02 Does the Citizen L20 require a guide bushing?

The standard L20 uses a guide bushing, which requires bar stock within ±0.02mm tolerance. Citizen also offers the L20 in a guide bushing-less (GB-less) configuration for short parts, reducing material waste from bar remnants.