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      MK250 CNC internal grinding machine Main

      Home - Product - NC internal grinding machine series

      Main characteristics of this machine tools

      ● This machine is a two axis (X-axis, Z-axis) CNC Internal Grinder, which is mainly used to grind the inner hole, step hole, inner end face and outer end face of the work piece. The grinding cycle is completed automatically (with automatic feed, withdrawal, rough grinding and fine grinding); Automatic dressing of grinding wheel, automatic compensation, etc.).
      ● The machine tool is fixed by the work piece box, the worktable moves left and right, and the grinding wheel frame do the back and forth feeding movement. The movement of the worktable and grinding wheel frame is driven by the servo motor through the ball screw, both of which adopt linear guide rails.
      ● The rotation speed of work piece spindle and grinding wheel spindle are controlled by frequency converter to realize stepless speed regulation.
      ● The machine tool adopts a front movable operation box and an independent electrical cabinet. The protective cover shell has two different styles of semi closed or fully closed for users optional.

      Specification parameter list

      Model of machine tools MK250
      The range of grinding diameter of hole (mm) 100-500
      Maximum grinding depth (mm) 500
      Swing diameter of work piece (mm) Inside the shell (mm) 510
      Outside the shell (mm) 720
      The maximum stroke of feeding slide (mm) 200
      The maximum stroke of workbench(mm) 730
      Maximum rotation angle of lather head(° ) 30°
      Rotating speed of work piece (r/min) 30-500 stepless speed regulation
      Rotating speed of grinding wheel (r/min) 2000-10000 stepless speed regulation
      Motor power of workpiece(kw) 4
      Motor power of grinding wheel(kw) 5.5
      Motor power of X-axis servo motor(kw) 2
      Motor power of Z-axis servo motor(kw) 4
      The power of oil pressure motor (kw) 0.55
      Cooling motor power (kw) 0.09×2
      Rated power(kw) 17.8
      Maximum speed of workbench m/min 6
      Grinding speed m/min 0-4
      Feed speed of grinding wheel m/min 5
      X-axis minimum resolution mm 0.001
      Z-axis minimum resolution mm 0.001
      Maximum load capacity of workpiece (kg) 300
      Flow of cooling pump(L/min)
      200
      The pressure of hydraulic system (MPa) 0.4
      Flow of oil pump(L/min) 25
      The weight of machine tools(kg)
      5600
      Machine overall dimension(mm)
      4000×1900×2000
      Machining precision Roundness of internal hole(μm) 3
      Cylindricity of internal hole(μm) 5
      Surface roughness of internal hole(μm) Ra0.63
      Roughness of end face(μm) Ra0.8

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