Citizen Cincom L20 Type XII B5
Image: cmj.citizen.co.jp, Citizen Machinery
Key Specifications
Max Spindle
Tool Capacity
max machining diameter
max machining length
max machining length gb 25mm dia spec
max machining length gbl
How much does the Citizen Cincom L20 Type XII B5 cost?
Estimated price range
Our best estimate for a swiss-type lathe in this class — not a quote from Citizen Machinery. Configuration moves it a long way.
Overview
The Citizen Cincom L20 Type XII B5 is the top of the third-generation L20 range: Citizen's series page names the type XIIB5 as the model in the five-model lineup that allows simultaneous 5-axis control. Underneath that capability it is a 20 mm Swiss-type lathe (25 mm optional) with 10,000 rpm on both spindles, a Y2 axis, back rotary tools and space for 41 tools.
A buyer should know that Citizen's published column for the type XII B5 carries exactly the same figures as the standard Cincom L20-XII. Nothing in the table, not the tool counts, motors, strokes or the 2,680 kg weight, describes the 5-axis equipment itself. The axis configuration, the tools it can hold and the control functions involved have to come from Citizen directly, and they are the reason to choose this type over the L20-XII.
What the table does give is the base machine. The main spindle passes 26.4 mm through its bore and is driven at 2.2 kW continuous, 3.7 kW for 15 minutes and 5.5 kW at 10%ED. One chucking covers 200 mm with the guide bush, 188 mm with 25 mm bar, or 50 mm guide-bushless. The gang tool post holds 6 turning tools and 21 rotary tools; those rotary tools drill 8 mm and tap M6 at up to 6,000 rpm (rated 4,500 rpm), or 9,000 rpm with the 2.2 kW S3 high-power motor.
Behind the cut-off, the back spindle drills 8 mm and taps M8 with 40 mm of protrusion, and back rotary tools add 5 mm drilling and M4 tapping at up to 7,500 rpm. There are 6 front and 8 back drilling tools. Plan for AC 200V ±10%, 8.3 kVA, a 60 A breaker, 0.5 MPa air and a W2,222 × D1,265 × H1,835 mm footprint.
Full Specifications
| Parameter | Value |
|---|---|
| Max Machining Diameter | 20 mm dia.(25 mm dia.OP.) |
| Max Machining Length | 200 mm per chucking |
| Max Machining Length Gb 25mm Dia Spec | 188 mm per chucking |
| Max Machining Length Gbl | max. 50 mm per chucking (GBL) |
| Max Drilling Diameter | 10 mm dia. |
| Max Tapping Diameter | M8 (cutting tap) |
| Spindle Bore | 26.4 mm dia. |
| Max Spindle Speed | max. 10,000 rpm |
| Sub Spindle Chuck Diameter | dia. 20 mm, dia. 25 mm[1”]option |
| Max Part Ejection Length | 130 mm |
| Max Workpiece Protrusion Length of Back Spindle | 40 mm |
| Back Machining Max Drilling Diameter | 8 mm dia. |
| Back Machining Max Tapping Diameter | M8 (cutting tap) |
| Sub Spindle Speed | max. 10,000 rpm |
| Gang Tool Post Rotary Tool Max Drilling Diameter | 8 mm dia. |
| Gang Tool Post Rotary Tool Max Tapping Diameter | M6 (cutting tap) |
| Gang Tool Post Rotary Tool Spindle Rotation | max. 6,000 rpm (rated speed: 4,500 rpm) |
| Gang Tool Post Rotary Tool | S3 high-power motor specifications: max. 9,000 rpm (rated speed: 9,000 rpm) |
| Rotary Tools on The Opposite Tool Post | max. 6,000 rpm (rated speed:4,500 rpm) |
| Rotary Tools on The Opposite Tool Post Max Drilling Diameter | 5 mm dia. |
| Rotary Tools on The Opposite Tool Post Max Tapping Diameter | M4 (cutting tap) |
| Rotary Tools on The Opposite Tool Post Spindle Rotation | max. 7,500 rpm (rated speed:6,000 rpm) |
| Back Rotary Tool Max Drilling Diameter | 5 mm dia. |
| Back Rotary Tool Max Tapping Diameter | M4 (cutting tap) |
| Back Rotary Tool Spindle Rotation | max. 7,500 rpm (rated speed:6,000 rpm) |
| Tool Capacity | 41 |
| Number of Mountable Tools Turning Tools on The Gang Tool Pos | 6 |
| Number of Mountable Tools Rotary Tools on The Gang Tool Post | 21 |
| Number of Mountable Tools Front Drilling Tools | 6 |
| Number of Mountable Tools Back Drilling Tools | 8 |
| Tool Size Turning Tools | 12 mm Sq. (13 mm Sq., 16 mm Sq.) |
| Tool Size Sleeve | 25 mm dia.(GDS107, 210) 19.05 mm dia. |
| Chuck Bushing Front Spindle Collet Chuck | FC034-M, FC071-M(φ 25 mm [1”]) |
| Chuck Bushing Back Spindle Collet Chuck | FC034-M-K, FC071-M-K(φ 25 mm [1”]) |
| Chuck Bushing Rotary Tool Collet Chuck | ER11, ER16 |
| Chuck Bushing Chuck for Drill Sleeve | ER11, ER16 |
| Chuck Bushing Guide Bushing | WFG206-M, DFG206-M, FG521-M(φ25 mm [1"]) |
| Rapid Feed Rate X1 Y1 Z1 X2 Z2 Axis | 32 m/min |
| Rapid Feed Rate Y2 Axis | 8 m/min |
| Motor for Front Spindle Drive | 2.2/3.7/5.5 kW (continuous/15 minute/10%ED ratings) |
| Motor for Back Spindle Drive | 1.5/2.2/3.7 kW (continuous/40%ED/10%ED ratings) |
| Motor for Driving Rotary Tools on The Gang Tool Post | 1.0 kW(2.2 kW with S3 high-power motor specifications) |
| Motor for Front Rotary Tool Drive | 0.75 kW |
| Motor for Back Rotary Tool Drive | 0.75 kW |
| For Coolant | 0.4 kW |
| Rated Power Consumption | 8.3 kVA |
| Load Operation Average Power Consumption | 4.5 kVA |
| Total Load Current | 37 A(41 A with S3 high-power motor specifications) |
| Main Breaker Capacity | 60 A |
| Power Supply Voltage | AC 200V ± 10% |
| Pneumatic Device Required Pressure | 0.5 MPa |
| Pneumatic Device Required Flow Rate | 52/ 55/ 177 L/min (Power ON/Normal/ With air blow) |
| Floor Space Required | W2,222 × D1,265 × H1,835 mm |
| Center Height | 1,050 mm |
| Machine Weight | 2,680 kg |
Specifications sourced from cmj.citizen.co.jp — verified 2026-10-03
Strengths & Limitations
Strengths
- The L20 type Citizen names as allowing simultaneous 5-axis control
- 41 tools with 21 gang rotary positions, 6 front and 8 back drilling tools
- Back rotary tools on a Y2 axis: 5 mm drilling and M4 tapping at up to 7,500 rpm
- 20 mm bar as standard, 25 mm (1 in) with the option, through a 26.4 mm spindle bore
- Guide-bush and guide-bushless modes: 200 mm or 50 mm per chucking
Limitations
- The published table gives no figures for the 5-axis equipment; every row matches the Cincom L20-XII
- Gang rotary tools run at 6,000 rpm (rated 4,500 rpm) unless the S3 high-power motor is ordered
- Front spindle drive of 2.2 kW continuous limits heavy cuts at 25 mm
- Y2 axis rapids at 8 m/min against 32 m/min on the main axes
Best For
Frequently Asked Questions
01
Citizen describes the type XIIB5 as the L20 model that allows simultaneous 5-axis control. The spec columns of the two are otherwise identical: 41 tools, 21 gang rotary tools, the same Y2 axis and back rotary tools, 10,000 rpm spindles and 2,680 kg. Ask Citizen for the details of the 5-axis equipment, because the table does not list them.
02
20 mm as standard and 25 mm (1 in) as an option, through a 26.4 mm spindle bore. The 25 mm specification uses FC071-M collets and the FG521-M guide bushing. In that specification the guide-bush stroke is 188 mm per chucking instead of 200 mm.
03
The front spindle drive is rated 2.2/3.7/5.5 kW (continuous/15 minute/10%ED). The back spindle drive is rated 1.5/2.2/3.7 kW (continuous/40%ED/10%ED). Both spindles reach 10,000 rpm. Gang rotary tools use a 1.0 kW motor, or 2.2 kW with the S3 high-power specification.
04
AC 200V ±10% with a 60 A main breaker; rated consumption is 8.3 kVA and total load current 37 A, or 41 A with the S3 motor. Air must be supplied at 0.5 MPa. The machine weighs 2,680 kg and measures W2,222 × D1,265 × H1,835 mm, with a 1,050 mm centre height.
Videos
Swiss CNC
Sy Tech Macchine Utensili Fabio Caravello
Community Discussions
Troubleshooting and problem-solving
Options and configuration advice
Links to community discussions. Summaries are editorial — visit the original thread for full context.
Comparisons
More from Citizen Machinery
Other Swiss-Type Lathes
Tsugami SS207-II-5AX
Star Micronics SA-20R Type B
Mazak SYNCREX 20/7
Tsugami BM165-VR
Tajmac-ZPS MANURHIN K'MX 520
