Citizen Cincom B12E-II

Specs verified 2026-10-03 · cmj.citizen.co.jp Updated 2026-10-03

Image: marucit.com, 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-II cost?

Price estimate

Uncertain

We do not have a price for the Citizen Cincom B12E-II that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.

Overview

The Citizen Cincom B12E-II is a compact sliding-headstock lathe for parts up to 12 mm in diameter. Its main spindle is rated 12,000 rpm (R.G.B.8,000 rpm), the lower figure applying with the removable guide bushing (R.G.B.) in use, and it holds 12 tools. At 1,100 kg and a 3.3 kVA power requirement it is a small machine to install.

The R.G.B. decides how the machine is used. With the guide bushing in place it machines 135 mm per chucking, and the bushing supports long, slender work close to the tool. With the R.G.B. in use the stroke drops to 60 mm per chucking and the spindle to its lower R.G.B. limit, a trade that suits short parts and bar that has not been ground for a guide bushing.

Tooling is sized for small work. Turning tools are 10 Sq. at 120 mm or 60 mm long, and sleeves are 19.05 mm dia., with 20 mm dia. as an option. The main spindle drills 6 mm dia. and taps M6; gang rotary tools drill 5 mm dia. and tap M4 at 4,500 rpm, driven by a 0.5 kW motor. The main spindle has a 20 mm dia. through hole and a 2.2/3.7 kW drive.

Rapid feed is 21 m/min on X and Y and 15 m/min on Z. Average power during load operation is 2.5 kVA, the coolant pump is 0.18 kW and the centre height 1,000 mm. Citizen's table for this model has no back-spindle rows, so plan on finishing parts from the front and ask Citizen if back-end work is needed. The Cincom B16 is listed at 10,000min-1 (R.G.B.8,000min-1) and 1,150kg.

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 Drilling Diameter for Rotary Tool	5 mm dia.
Maximum Tapping Diameter for Rotary Tool	M4
Spindle Speed of The Gang Rotary Tool	4,500 rpm
Number of Tools to Be Mounted	12
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
Motors for Spindle Drive	2.2/3.7 kW
Motors for Tool Spindle Drive	0.5 kW
Motors for Cutting Coolant Oil	0.18 kW
Power Requirement	3.3 kVA
Load Operation Average Power	2.5 kVA
Center Height	1,000 mm
Machine Weight	1,100 kg

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

Strengths & Limitations

Strengths

Main spindle rated 12,000 rpm (R.G.B.8,000 rpm) for small-diameter turning
Removable guide bushing allows short parts at 60 mm per chucking
Low power demand: 3.3 kVA requirement and 2.5 kVA average under load
Rotary tools at 4,500 rpm drill 5 mm dia. and tap M4
Light 1,100 kg machine with a 1,000 mm centre height

Limitations

No back-spindle rows in the table, so back-end machining must be confirmed with Citizen
12 tool positions limit the number of operations per part
Rotary-tool motor is 0.5 kW, enough for small holes but not for milling
Spindle speed falls to the R.G.B. limit (R.G.B.8,000 rpm) when the removable guide bushing is in use

Best For

Small precision parts up to 12 mm diameter Short parts using the removable guide bushing Simple turned parts with small cross holes and M4 threads Shops with a limited electrical supply, at 3.3 kVA

Frequently Asked Questions

01 What does the R.G.B. change on the Cincom B12E-II?

With the removable guide bushing in use, the machining length drops from 135 mm to 60 mm per chucking and the spindle limit from 12,000 rpm to the figure Citizen gives as R.G.B.8,000 rpm. It suits short parts; long slender work stays on the guide bushing.

02 What drilling and tapping can the B12E-II do?

The main spindle drills to 6 mm dia. and taps to M6. Gang rotary tools drill to 5 mm dia. and tap to M4 at 4,500 rpm on a 0.5 kW motor. Turning tools are 10 Sq. at 120 mm or 60 mm long.

03 Does the B12E-II have a back spindle?

Citizen's table for the B12E-II has no back-spindle rows: no back chuck size, speed or motor. Plan on parts being finished from the front and confirm with Citizen if any back-end operation is needed.

04 How does the B12E-II compare with the Cincom B16?

The Cincom B16 is listed at 10,000min-1 (R.G.B.8,000min-1), 1,150kg and a 20 mm (0.787 in) spindle bore. The B12E-II runs to 12,000 rpm (R.G.B.8,000 rpm), weighs 1,100 kg and has a 20 mm dia. through hole.

05 What does the B12E-II need to install?

A 3.3 kVA power supply, with 2.5 kVA average during load operation, and floor for 1,100 kg. The centre height is 1,000 mm, which the bar feeder must be set to.