Citizen Cincom B12E-V
Key Specifications
Max Spindle
max bar capacity
max machining diameter
max machining length
main spindle speed
main spindle power
Overview
The Citizen Cincom B12E-V is a compact dual-spindle Swiss-type automatic lathe with 12mm bar capacity, occupying the middle position in the B12E family. The V designation adds a back spindle, transforming it into a complete part production platform capable of front and back machining in a single cycle, eliminating secondary operations for the majority of 12mm-class Swiss parts.
The main spindle reaches 12,000 RPM (8,000 RPM in R.G.B. mode) with 2.2/3.7 kW, while the back spindle operates at 6,000 RPM for back-turning, back-facing, back-drilling, and back-tapping. Maximum machining length is 135mm per chucking. The back spindle chuck accepts up to 12mm. With 13 tool positions, the B12E-V supports both front and back machining programs.
The R.G.B. feature allows operation with or without a guide bushing. At 1,150 kg and 5.2 kVA rated power (4 kVA average), the B12E-V is only marginally larger than the B12E-II but delivers substantially more capability.
For shops needing complete 12mm Swiss parts in a single operation without the rotary tool capability of the B12E-VI, the B12E-V offers the optimal balance of capability, cost, and simplicity in the B12E family.
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 (8,000 RPM in R.G.B. mode) |
| Main Spindle Power | 2.2 / 3.7 kW (3 / 5 HP) |
| Back Spindle Speed | 6,000 RPM |
| Back Spindle Chuck | 12 mm (0.472 in) |
| Number Of Tools | 13 |
| 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 rated / 4 kVA average |
| Machine Weight | 1,150kg |
| CNC Control | Mitsubishi Meldas (Citizen software) |
| Item | B12E II |
| 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 |
| Tool Size | Turning tool |
| Sleeve | 19.05mm Dia.(Option:20mm Dia.) |
| Rapid Feed Rate | X axis |
| Y Axis | 21m/min |
| Z Axis | 15m/min |
| Motors | For spindle drive |
| 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 |
| Sliding Headstock Type | A20 |
| Bar Work | BNC42 |
| Turning Machine | BNA42CY |
| High Precision Turning Machines | BNA42SY |
| Multi Station Machining Cell | MC20 III |
| 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 |
| Inquiries | Feel free to get in touch with us by phone or online if you have any questions or need advice about any of our products or services. |
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
Frequently Asked Questions
01
New B12E-V runs $80,000-$140,000, between B12E-II and B12E-VI.
02
B12E-VI adds 3 more tools (16 vs 13) and 4,500 RPM rotary tools for cross-milling.
03
Yes, machines 304/316 effectively. Without LFV, chip control requires tooling geometry attention.
04
Yes with bar feeder in free-machining materials. Back spindle enables complete part ejection.
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