Citizen Cincom B12E-V

Est. $80,000 - $140,000 Specs verified 2026-10-03 · cmj.citizen.co.jp Updated 2026-10-03

Image: cmj.citizen.co.jp, Citizen Machinery

Key Specifications

Max Spindle

12,000 rpm (R.G.B. 8,000 rpm)

maximum machining diameter

12 mm dia.

maximum machining length

135 mm/chuck(R.G.B. in use 60 mm/chuck)

maximum drilling diameter for main spindle

6 mm dia.

maximum front tapping diameter tap die

main spindle through hole diameter

20 mm dia.

How much does the Citizen Cincom B12E-V cost?

Estimated price range

Est.$80,000 - $140,000

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 B12E-V is a 12 mm sliding-headstock automatic lathe for small turned parts that need work on both ends. It pairs a 12,000 rpm main spindle with a back spindle that takes a 12 mm chuck and runs to 6,000 rpm. In Citizen's B12E/B16E table it is the back-spindle variant without gang rotary tools, and it carries 13 tool positions.

Bar work is limited to 12 mm diameter, fed through a 20 mm main spindle through-hole. Each chucking stroke covers up to 135 mm with the guide bush. With the R.G.B. in use the stroke drops to 60 mm per chucking and the main spindle runs to a lower R.G.B. limit, given in brackets beside the 12,000 rpm figure in Citizen's table. That is the price of running without a guide bush on short parts. At the front the table allows drilling to 6 mm diameter and tapping to M6 with tap or die.

The back spindle is the reason to pick this variant over a single-spindle machine. It holds work protruding up to 30 mm, and back machining is listed to 5 mm drilling and M3 tapping, enough to chamfer, face, centre-drill and tap the cut-off end of a pin or screw. Because the table gives no rotary-tool rows for this model, cross holes, flats and off-centre features are outside its scope.

Turning tools are 10 mm square at 120 mm or 60 mm length, and sleeves are 19.05 mm diameter with 20 mm as an option. Rapids are 21 m/min on X and Y and 15 m/min on Z. The main spindle motor is listed at 2.2/3.7 kW and the back spindle motor at 1.0 kW. Installation is light: a 5.2 kVA power requirement with a 4 kVA average under load, a 1,000 mm centre height and 1,150 kg on the floor.

Full Specifications

Parameter	Value
Maximum Machining Diameter	12 mm dia.
Maximum Machining Length	135 mm/chuck(R.G.B. in use 60 mm/chuck)
Maximum Drilling Diameter for Main Spindle	6 mm dia.
Maximum Front Tapping Diameter Tap Die	M6
Main Spindle Through Hole Diameter	20 mm dia.
Max Spindle Speed	12,000 rpm (R.G.B. 8,000 rpm)
Maximum Chuck Diameter of Back Spindle	12 mm dia.
Maximum Protrusion Length of The Back Spindle Workpiece	30 mm
Maximum Drilling Diameter in Back Machining Process	5 mm dia.
Maximum Tapping Diameter in Back Machining Process	M3
Sub Spindle Speed	6,000 rpm
Number of Tools to Be Mounted	13
Tool Size Turning Tool	10 Sq.×120 mm or 60 mm
Tool Size Sleeve	19.05 mm dia.(Option:20 mm dia.)
Rapid Feed Rate X Axis	21 m/min
Rapid Feed Rate Y Axis	21 m/min
Rapid Feed Rate Z Axis	15 m/min
Rapid Feed Rate A2 Axis	15 m/min
Motors for Spindle Drive	2.2/3.7 kW
Motors for Back Spindle Drive	1.0 kW
Motors for Cutting Coolant Oil	0.18 kW
Power Requirement	5.2 kVA
Load Operation Average Power	4 kVA
Center Height	1,000 mm
Machine Weight	1,150 kg

Specifications sourced from cmj.citizen.co.jp — verified 2026-10-03

Strengths & Limitations

Strengths

Back spindle with a 12 mm chuck at 6,000 rpm, so the cut-off end is faced, drilled or tapped in the same cycle
12,000 rpm main spindle suits the small diameters a 12 mm bar produces
135 mm per chucking with the guide bush, or 60 mm per chucking with the R.G.B. in use for short parts
Modest services: 5.2 kVA power requirement, 4 kVA average in operation and 1,150 kg machine weight
21 m/min rapids on X and Y keep idle moves short on small parts

Limitations

The table lists no gang rotary tools for this variant, so cross drilling and milling need the Cincom B12E-VI
Bar capacity stops at 12 mm diameter; the Cincom B16E-V takes 16 mm bar
Back machining is limited to 5 mm drilling and M3 tapping
With the R.G.B. in use the stroke falls to 60 mm per chucking and the main spindle runs below its 12,000 rpm maximum

Best For

Turned pins and shafts up to 12 mm diameter Parts that need back-end drilling to 5 mm or M3 tapping Plain turned parts without cross features Short parts run with the R.G.B. to save bar

Frequently Asked Questions

01 What is the difference between the B12E-V and the B12E-VI?

Rotary tools and tool count. The Cincom B12E-VI adds gang rotary tools rated for 5 mm drilling and M4 tapping at 4,500 rpm, driven by a 0.5 kW motor, and it mounts 16 tools against 13 on the B12E-V. Bar capacity of 12 mm, the 12,000 rpm main spindle, the 12 mm back spindle chuck and the 1,150 kg weight are the same on both.

02 How does running with the R.G.B. change the B12E-V's limits?

With the R.G.B. in use the maximum machining length falls from 135 mm per chucking to 60 mm per chucking, and the main spindle maximum drops below 12,000 rpm to the separate R.G.B. figure Citizen lists. The trade suits short parts where bar remnant matters more than length per stroke.

03 How much back-end work can the back spindle do?

The back spindle takes a 12 mm chuck, runs to 6,000 rpm on a 1.0 kW motor and allows up to 30 mm of the workpiece to protrude. Back machining is listed to 5 mm drilling and M3 tapping, which covers facing, chamfering, centre holes and small tapped holes on the cut-off end.

04 What power supply does the B12E-V need?

Citizen lists a power requirement of 5.2 kVA and an average of 4 kVA during load operation. The main spindle motor is 2.2/3.7 kW, the back spindle motor 1.0 kW and the coolant pump 0.18 kW. The machine weighs 1,150 kg with a centre height of 1,000 mm.