Citizen Cincom A20-VII

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

Key Specifications

Rapid Traverse

32 m/min

max bar capacity

20 mm (0.787 in)

max machining diameter

20 mm (0.787 in)

max machining length

200 mm (7.87 in)

main spindle speed

10,000 RPM

main spindle power

2.2 / 3.7 kW (3 / 5 HP)

Overview

The Citizen Cincom A20-VII is Citizen's seventh-generation 20mm Swiss-type automatic lathe, refining a platform that has shipped in volume to precision manufacturers worldwide. The 'A' series sits in Citizen's Swiss lineup as the versatile mid-range platform—more tooling capacity than the compact K-series and broader material capability than entry-level configurations, while stopping short of the simultaneous multi-axis complexity of the L and M series. The A20-VII delivers 20mm bar capacity with a capable axis count and tooling layout suited for medical, electronics, and automotive precision components that require thorough front and rear machining but stop short of demanding B-axis angular features.

The seventh-generation designation reflects a cumulative refinement cycle rather than a ground-up redesign—Citizen has progressively improved spindle bearings, guide bushing alignment, thermal compensation, and LFV (Low Frequency Vibration) chip-breaking integration with each generation. On the A20-VII, LFV is standard and operates across the main spindle, breaking chips during deep boring, stainless drilling, and difficult reaming operations where conventional high-pressure coolant struggles. The result is reliable unmanned operation in sticky materials that previously demanded operator intervention.

The main spindle runs to 10,000 RPM with a power envelope of 2.2/3.7 kW (continuous/30-min), while the back spindle operates at the same speed ceiling with 1.5/2.2 kW. Up to 37 tool positions accommodate comprehensive tooling layouts for complex front-work and thorough backworking on the sub-spindle. Rapid traverse reaches 32 m/min on the main linear axes. The FANUC 32i-B control handles all axis coordination with Citizen's dedicated Swiss-type software layer managing synchronized dual-spindle operation, LFV parameters, and guide bushing/guide-bushless mode selection.

At roughly 2,100 x 1,550 x 1,750 mm and under 2,400 kg, the A20-VII fits into typical Swiss cell footprints and is compatible with standard bar feeders and parts catchers. For shops producing connectors, dental components, surgical instruments, and small automotive fittings in the 1–20mm diameter range, the A20-VII delivers a well-rounded capability set without overinvesting in complexity that the part mix does not demand.

Full Specifications

Parameter	Value
Max Bar Capacity	20 mm (0.787 in)
Max Machining Diameter	20 mm (0.787 in)
Max Machining Length	200 mm (7.87 in)
Main Spindle Speed	10,000 RPM
Main Spindle Power	2.2 / 3.7 kW (3 / 5 HP)
Back Spindle Speed	10,000 RPM
Back Spindle Power	1.5 / 2.2 kW (2 / 3 HP)
Spindle Bore	26 mm (1.02 in)
Number Of Axes	7-axis
Number Of Tools	37
Lfv Chip Breaking	Yes (standard)
Guide Bushing	Yes / Guide-bushless option
Rapid Traverse Rate	32 m/min
Power Consumption	7.0 kVA rated
Machine Dimensions	2,100 x 1,550 x 1,750 mm (82.7 x 61 x 68.9 in)
Machine Weight	2,350 kg (5,181 lbs)
CNC Control	FANUC 32i-B (Citizen software)
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

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Limitations

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Best For

Medical device manufacturers producing dental components, surgical fasteners, and small implants in the 1–20mm diameter range Electronics precision shops running connectors, contacts, and housings that require comprehensive front and back machining Automotive precision parts producers making hydraulic fittings, sensors, and fuel system components Shops transitioning from older Swiss-type platforms seeking a modern LFV-equipped replacement without full multi-axis investment High-volume precision shops where the part mix does not justify B-axis capability but demands reliable unmanned operation

Frequently Asked Questions

01 What does a Citizen Cincom A20-VII cost?

A new Citizen Cincom A20-VII typically ranges from $150,000 to $230,000 depending on tooling options, bar feeder, and configuration choices. The guide-bushless option and LFV are standard on the VII generation, so the price variation is primarily driven by tooling packages and accessories. Used A20 machines in earlier generations can be found significantly cheaper, though they may lack LFV capability.

02 What is LFV and why does it matter on the A20-VII?

LFV (Low Frequency Vibration) is Citizen's patented chip-breaking technology that superimposes a controlled oscillation on the cutting feed to break chips mechanically rather than relying on coolant pressure or chip breaker geometry. On the A20-VII, LFV is standard and enables reliable drilling, boring, and reaming in stainless steel, titanium, and other materials that produce long, stringy chips. This is the primary enabler of extended unmanned production on difficult materials.

03 How does the A20-VII compare to the L20?

Both are 20mm Swiss-type platforms from Citizen, but the L20 series (particularly the XII variants) offers higher axis counts, more tooling positions, and B-axis availability for angular machining. The A20-VII is positioned as a capable production platform for parts that don't require the full multi-axis capability of the L20. The A20-VII typically costs less and suits shops whose part complexity matches its tooling layout.

04 Can the A20-VII run guide-bushless?

Yes, the A20-VII supports an optional guide-bushless configuration. Guide-bushless mode is recommended for parts shorter than roughly 3x the bar diameter, where it reduces bar remnant waste and eliminates guide bushing maintenance. For longer parts or applications requiring maximum rigidity on slender workpieces, the guide bushing configuration is preferred.

05 What bar feeder is recommended for the A20-VII?

Most major Swiss-compatible bar feeders pair well with the A20-VII, including models from LNS, Iemca, and Citizen's own recommended feeders. For lights-out operation, a 12-foot (3.6m) magazine bar feeder with remnant management is standard. Ensure the bar feeder is rated for the RPM and vibration profile of 10,000 RPM Swiss operation.