CNC lathe Roturn 400 C
horizontal2-axisslant bed

CNC lathe - Roturn 400 C - Knuth Machine Tools - horizontal / 2-axis / slant bed
CNC lathe - Roturn 400 C - Knuth Machine Tools - horizontal / 2-axis / slant bed
CNC lathe - Roturn 400 C - Knuth Machine Tools - horizontal / 2-axis / slant bed - image - 2
CNC lathe - Roturn 400 C - Knuth Machine Tools - horizontal / 2-axis / slant bed - image - 3
CNC lathe - Roturn 400 C - Knuth Machine Tools - horizontal / 2-axis / slant bed - image - 4
CNC lathe - Roturn 400 C - Knuth Machine Tools - horizontal / 2-axis / slant bed - image - 5
CNC lathe - Roturn 400 C - Knuth Machine Tools - horizontal / 2-axis / slant bed - image - 6
CNC lathe - Roturn 400 C - Knuth Machine Tools - horizontal / 2-axis / slant bed - image - 7
CNC lathe - Roturn 400 C - Knuth Machine Tools - horizontal / 2-axis / slant bed - image - 8
CNC lathe - Roturn 400 C - Knuth Machine Tools - horizontal / 2-axis / slant bed - image - 9
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Characteristics

Control type
CNC
Spindle orientation
horizontal
Number of axes
2-axis
Structure
slant bed
Spindle mount
A2-6
Number of tool stations
8 tools
Applications
for production
Diameter

400 mm
(15.75 in)

Spindle speed

Max.: 3,000 rpm
(18,849.556 rad.min-1)

Min.: 50 rpm
(314.159 rad.min-1)

Maximum part length

430 mm
(17 in)

Axe X

200 mm
(8 in)

Axe Z

450 mm
(18 in)

Rapids on X

16,000 mm/min
(10 in/s)

Rapids on Z

20,000 mm/min
(13 in/s)

Nominal power

15 kW
(20.4 hp)

Overall lenght

3,800 mm
(150 in)

Overall width

1,870 mm
(74 in)

Overall height

1,910 mm
(75 in)

Weight

3,340 kg
(7,363 lb)

Description

Product overview
The ROTURN 400 C is an inclined-bed CNC production lathe equipped with Siemens 828 D Basic control. It features an 8-station tool turret, a 15 kW (20 hp) main spindle motor, a hydraulic 3-jaw chuck with through-hole and a hydraulically operated tailstock quill with 85 mm stroke. A hinged flat-top chip conveyor and a high-performance coolant system are supplied as standard.

Highlights
  • 15 kW main spindle motor
  • 8-station tool turret
  • Hydraulic 3-jaw chuck with through-hole (200 mm)
  • Siemens 828 D Basic control
  • Flat-top chip conveyor and coolant system included


Machine design
  • Heavy inclined-bed frame for high rigidity and effective chip evacuation
  • Precision linear guides on X and Z axes for stability and accuracy under load
  • Enclosed workspace with large sliding door for easy access
  • Automatic central lubrication for reliable guideway lubrication


Spindle
  • Max spindle speed: 3,000 min⁻¹ (Roturn 400 C)
  • Motor power: 15 / 11 kW (15 kW noted as main spindle motor)
  • Spindle mount: A2-6
  • Spindle bore: 62 mm (46 mm with draw tube)


Tooling & Turret
  • 8-station turret for fast, precise tool indexing
  • Tool shank size: 25 x 25 mm
  • Boring bar mount diameter: 40 mm


Tailstock
  • Tailstock taper: 5 MT
  • Quill diameter: 88 mm
  • Hydraulically operated quill stroke: 85 mm


Standard equipment (selected)
  • Siemens 828 D Basic control
  • Hydraulic 3-jaw chuck Ø 200 mm with through-hole
  • Hydraulic tailstock
  • Automatic central lubrication
  • Hinged flat-top chip conveyor and trolley
  • Coolant system with flush gun
  • LED work lamp, operator manual and operating tools


Other functional features
  • Rapid feed X-axis: 16,000 mm/min
  • Rapid feed Z-axis: 20,000 mm/min
  • Coolant pump motor: 0.18 kW


Dimensions / Mass
  • Overall (L x W x H): 3.8 m x 1.87 m x 1.91 m
  • Weight: 3,340 kg


Technical specifications (extract)
Working area
Max. workpiece length: 430 mm
Center height: 200 mm
Turning diameter over bed: 400 mm
Turning diameter over support: 250 mm

Travels
Travel X-axis: 200 mm
Travel Z-axis: 450 mm

Headstock / Spindle
Chuck diameter: 200 mm
Speed range: 50 min⁻¹ - 3,000 min⁻¹
Spindle mount: A2-6
Spindle bore: 62 mm (46 mm with draw tube)

Tooling
Number of tool stations: 8
Tool shank: 25 x 25 mm
Boring bar mount Ø: 40 mm

Tailstock
Taper: 5 MT
Quill diameter: 88 mm
Quill stroke: 85 mm

Drive ratings
Main motor rating: 15 / 11 kW
Coolant pump: 0.18 kW

Catalogs

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Exhibitions

Meet this supplier at the following exhibition(s):

IMTS 2026
IMTS 2026

14-19 Sep 2026 Chicago (USA - Illinois) Hall South Level 3 - Stand 338012

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