Knuth CNC Vertical Machining X.mill 640 SI inkl. 4. Achse

83.054,50 EURplus 16 % tax, excl. Shipping costs

Product No.:
No longer available (abroad may vary)
Weight per unit:
4200 kg

Knuth CNC Vertical Machining Center X.mill 640 SI inkl. 4. Achse


Powerful package with 4th axis = compact, powerful, precise and very economical

  • 16-station dual-arm tool changer, change time 1.6 sec
  • rapid feed 30 m/min
  • premium linear guideways on all axes
  • powerful axis servo drives
  • solid cast-iron machine body serves as foundation for high precision at high travel speeds, and powerful chip removal
  • totally enclosed work space with side doors ensures maximum safety and flexibility
  • quick tool changes and pneumatic clamping for reduced cost

Specifications - X.mill 640 SI incl. 4th axis - CNC Vertical Machining Center

working area  
travel X-axis 640 mm
travel Y-axis 400 mm
travel Z-axis 500 mm
table dimensions 750x360 mm
table load capacity 300 kg
table height 850 mm
number of T-slots 3 Pieces
T-slots, width 18 mm
T-slots, spacing 100 mm
spindle nose-to-table surface distance 50 - 550 mm
speed range 60 - 8000 rpm
spindle thoat 430 mm
spindle mount MAS BT 40
rapid feed X-axis 30000 mm/min
rapid feed Y-axis 30000 mm/min
rapid feed Z-axis 30000 mm/min
work feed 10 - 5000 mm/min
4th axis (vertical and horizontal setup, incl. tailstock)  
manual lathe chuck 160 mm
positioning accuracy ± 40 s
repeatability 4 s
braking torque 230 Nm
gear ratio 90:1
4th axis spindle mount A-6
4th axis dimensions 185x90x175 mm
weight (with motor) 70 kg
tool head  
number of tool stations 16 Pieces
tool size Ø x L (max.) 78x250 mm
tool weight max. 8 kg
tool-change time tool/tool 1,6 s
positioning accuracies ± 0,003 mm / ± 0,0001"
repeatabilities ± 0,0025 mm / ± 0,00001"
drive capacity  
motor rating main drive (cont./30 min) 7/10 kW / 9/13 Hp
measures and weights  
overall dimensions 2240x1800x2400 mm
weight 4200 kg

Control - X.mill 640 SI incl. 4th axis - CNC Vertical Machining Center

Siemens Sinumerik 828 D Fräsen

the top specialist for demanding milling operations



  • compact, robust, maintenance-free control panel-based CNC
  • comfortable program and parameter input via QWERTY keyboard
  • maximum machining precision
  • intelligent kinematic transformations for machining of cylindrical parts, and for angled workpiece levels
  • SINUMERIK MDynamics with the new Advanced Surface feature: for perfect part surfaces and shortest machining times in mold making applications
  • ShopMill: shortest programming time for single parts and small batch productions
  • programGUIDE: fastest machining time and maximum flexibility for large series productions
  • unique spectrum of technology cycles - from milling contours with residual material recognition to process measurements
  • Animated Elements: unique operation and programming assistance with animated sequences
  • modern data transfer options via USB stick, CF card and network (Ethernet)
  • Easy Message: maximum machine availability due to process monitoring per texting (SMS)

CNC hardware

  • control-panel based high-performance CNC Control
  • robust front control panel made of magnesium die-casting
  • integreated full-size QWERTY keyboard
  • 10.4“ TFT color monitor
  • maintenance-free design (no buffer battery required)

CNC performance data and functions

  • SINUMERIK MDynamics package with Advanced Surface for mold making applications
  • tool changing time: ~2 ms (PPU 260/261) /~1 ms (PPU 280/281)
  • number of Look Ahead sets: 100 (PPU 260/261) / 150 (PPU 280/281)
  • Jerk-limited acceleration
  • dynamic feed-forward control
  • 4-axis simultaneous interpolation (X, Y, Z and rotary axis)
  • linear, circular and helical interpolation
  • tapping without compensating chuck, plus thread cutting
  • oriented spindle holder
  • toggle between inch and metric units
  • FRAME concept for individual coordinate transformations, rotations, scaling and mirroring
  • 100 adjustable zero offsets
  • synchronous actions and quick help function output

CNC technology cycles

  • technology cycles for programGUIDE and ShopMill work step programming are available
  • large selection of drilling cycles
  • large selection of milling cycles for standard geometries
  • large selection of position patterns for drilling and milling operations
  • High-speed settings for mold making applications
  • geometrie calculator for free contour input
  • machining cycle for contour pockets / contour spigots with isolated contours

Graphic features

  • Animated Elements: input help for machining parameters with animated sequences
  • graphical online help system, similar to PC system
  • graphical CNC simulation with level display

CNC tool management

  • display of tool and magazine data on one screen
  • tool management with plain-text tool names
  • loading/unloading feature for easy magazine assignment
  • number of tool edges: 256 (PPU 260/261) / 512 (PPU 280/281)
  • tool management with tool life monitoring

Standard equipment - X.mill 640 SI incl. 4th axis - CNC Vertical Machining Center

Siemens 828 D control, electronic hand-wheel, spiral chip conveyor, 4. axis, servo drive for all 3 axes, 16-station tool changer with dual-arm, pneumatic tool clamping, spindle oil cooler, totally enclosed work space, work lamp, Ethernet, USB interface, tilted chip tray, automatic central lubrication, operating tools, operator manual


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