Citizen Cincom B12
This model was not found in Citizen Machinery's current lineup when we checked on 2026-10-03 (lineup page). It may be a superseded or older model; the specifications below are as we last recorded them.
Image: cmj.citizen.co.jp, Citizen Machinery
Key Specifications
Max Spindle
max bar capacity
max machining diameter
max machining length
main spindle speed
main spindle power
How much does the Citizen Cincom B12 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 B12 is a sliding-headstock automatic lathe for 12 mm (0.472 in) bar, with a 20 mm (0.787 in) spindle bore and a Mitsubishi Meldas control running Citizen software. It is not in Citizen's current lineup, so a B12 will be a used machine. For reference, the Cincom B12E-II weighs 1,100 kg against 1,150 kg for the B12.
With the guide bushing the B12 machines 135 mm per chucking. A removable guide bushing (R.G.B.) is an option; with it in use the stroke falls to 60 mm per chucking. That trade makes sense for short parts, where running without the bushing leaves less bar behind and accepts bar that is not ground to guide-bush tolerance, but long slender work stays on the guide bushing.
Hole-making is modest. The main spindle drills 6 mm and taps M6. Gang rotary tools drill 5 mm and tap M4 at 4,500 rpm on a 0.5 kW motor, enough for cross holes and small threads but not for milling. Turning tools are 10 Sq. with a length of 120 mm or 60 mm, and sleeves are 19.05 mm, with 20 mm as an option. Rapid feed is 21 m/min on X and Y and 15 m/min on Z.
The B12 is rated at 5.2 kVA, averages 4 kVA under load and has a 1,000 mm centre height. Its table gives two different values for the top spindle speed, the tool count and the machining diameter, so read those from the machine and its documentation rather than from a listing.
Full Specifications
| Parameter | Value |
|---|---|
| Max Bar Capacity | 12 mm (0.472 in) |
| Max Machining Diameter | 12 mm (0.472 in) |
| Max Machining Length | 135 mm (5.31 in) |
| Main Spindle Speed | 12,000 RPM |
| Main Spindle Power | 2.2 kW (3 HP) |
| Spindle Bore | 20 mm (0.787 in) |
| Rotary Tool Speed | 4,500 RPM |
| Number of Tools | 12 |
| Rapid Feed Rate X Y | 21 m/min |
| Rapid Feed Rate Z | 15 m/min |
| Guide Bushing | Yes (Removable Guide Bushing option) |
| Power Consumption | 5.2 kVA |
| Machine Weight | 1,150kg |
| CNC Control | Mitsubishi Meldas (Citizen software) |
| Maximum Machining Diameter | 16mm Dia. |
| Maximum Machining Length | 135mm/chuck(R.G.B. in use 60mm/chuck) |
| Maximum Drilling Diameter for Main Spindle | 6mm Dia. |
| Maximum Front Tapping Diameter | M6 |
| Main Spindle Through Hole Diameter | 20mm Dia. |
| Max Spindle Speed | 10,000min-1(R.G.B.8,000min-1) |
| Maximum Drilling Diameter for Rotary Tool | 5mm Dia. |
| Maximum Tapping Diameter for Rotary Tool | M4 |
| Spindle Speed of The Gang Rotary Tool | 4,500min-1 |
| Number of Tools to Be Mounted | 16 |
| Sleeve | 19.05mm Dia.(Option:20mm Dia.) |
| Y Axis | 21m/min |
| Z Axis | 15m/min |
| For Tool Spindle Drive | 0.5kW |
| For Cutting Coolant Oil | 0.18kW |
| Rated Power Consumption | 5.2kVA |
| Load Operation Average Power | 4kVA |
| Center Height | 1,000mm |
| Tool Size Turning Tool | 10 Sq.×120mm or 60mm |
| Tool Size Sleeve | 19.05mm Dia.(Option:20mm Dia.) |
| Rapid Feed Rate X Axis | 21m/min |
| Rapid Feed Rate Y Axis | 21m/min |
| Rapid Feed Rate Z Axis | 15m/min |
| Motors for Spindle Drive | 2.2/3.7kW |
| Motors for Tool Spindle Drive | 0.5kW |
| Motors for Cutting Coolant Oil | 0.18kW |
| Maximum Chuck Diameter of Back Spindle | 16mm Dia. |
| Maximum Protrusion Length of The Back Spindle Workpiece | 30mm |
| Maximum Drilling Diameter in Back Machining Process | 5mm Dia. |
| Maximum Tapping Diameter in Back Machining Process | M3 |
| Rapid Feed Rate A2 Axis | 15m/min |
| Motors for Back Spindle Drive | 1.0kW |
Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.
Strengths & Limitations
Strengths
- Removable guide bushing option for short parts, at 60 mm per chucking against 135 mm with the guide bushing
- Main spindle drills 6 mm and taps M6
- Rotary tools drill 5 mm and tap M4 at 4,500 rpm
- 21 m/min rapids on X and Y
- Light at 1,150 kg, with a 5.2 kVA rated power requirement
Limitations
- Not in Citizen's current lineup, and the table gives conflicting spindle speed and tool count; confirm on the machine
- Rotary tools have a 0.5 kW motor at 4,500 rpm, suited to light cross work only
- Z rapid is 15 m/min, against 21 m/min on X and Y
- Bar capacity of 12 mm (0.472 in) limits the part size
Best For
Frequently Asked Questions
01
12 mm (0.472 in), through a 20 mm (0.787 in) spindle bore. With the guide bushing the machining length is 135 mm per chucking; with the removable guide bushing in use it is 60 mm per chucking.
02
The R.G.B. option lets the B12 run without a guide bushing for short parts. The per-chucking stroke drops from 135 mm to 60 mm, so it suits short, stubby work rather than long slender parts.
03
The main spindle drills to 6 mm and taps to M6. Gang rotary tools drill to 5 mm and tap to M4, running at 4,500 rpm on a 0.5 kW tool-spindle motor.
04
Confirm the top spindle speed, the number of tools and the machining diameter on the machine, since the table gives two values for each. The control is a Mitsubishi Meldas with Citizen software; power is 5.2 kVA rated and the weight 1,150 kg.
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