YAMA SEIKI

PLUNGE CNC CYLINDRICAL GRINDER

The grinding wheel spindle designs by high rigidity, low temperature raise and non-contact hydro-static bearing which makes accuracy less than 0.001 mm ( 0.0000393" ).
Spindle Head :
  • Spindle head is driven by servo motor which provides variable speed change.
  • Both fixed type and non fixed type spindles are available to meet various applications.
  • Optional I.D. grinding wheel provides more flexible applications.
Plunge Grinding Examples
The wheel spindle can be quickly set up for plunge grinding.
Machine Specifications
CAPACITY GRU-2040 GRU-2060
Distance between centers 420 mm ( 16.53" ) 620 mm ( 24.40" )
Max. swing over table Ø 200 mm ( 7.87" )
Max. load between centers 80 kg ( 176 lb )
Max. external grinding diameter Ø 190 mm ( 7.48" )
Roundness 0.8 μm
Machine positioning accuracy 1 μm
WHEEL SPINDLE
Swivel angle ± 30°
Wheel O.D. x width x I.D. Ø 405 x Max. 80 x Ø 127 mm ( Ø 15.94" x Max. 3.14" x Ø 5" )
Wheel spindle travel 180 mm ( 7.08" )
Max. travel 180 mm ( 7.08" )
Min. setting unit 0.001 mm ( 0.0000393" )
Max. rapid traverse speed 8 m/min. ( 314 IPM )
Grinding feed rate 0.0001 - 6,000 mm/min. ( 0.0001 - 236 IPM )
WORK TABLE
Swivel angle -3˚ ~ +12˚
Max. travel 420 mm ( 16.53" ) 620 mm ( 24.40" )
Max. rapid traverse speed 10 m/min. ( 394 IPM )
Min. setting unit 0.001 mm ( 0.0000393" )
Grinding feed rate 0.0001 - 8,000 mm/min. ( 0.0001 - 315 IPM )
WORK-PIECE SPINDLE
Spindle motor Servo Motor
Swivel angle +90˚ ~ -30˚
Center taper MT#3
TAILSTOCK
Travel 20 mm ( 0.78" )
Center taper MT#3
MOTOR
Axes drive motor X-axis 1 kW ( 1.34 HP )
Z-axis 1.5 kW ( 2 HP )
Wheel spindle motor 5 HP
Work-piece spindle servo motor 0.75 kW ( 1 HP )
Hydraulic pump 2 HP
Coolant pump 1/4 HP
GENERAL
Dimensions 2,500 x 1,900 x 1,800 mm ( 98.5" x 74.8" x 70.9" )
Net weight 3,150 kg ( 6,950 lb ) 3,500 kg ( 7,720 lb )

Specifications are subject to change without notice.