CNC Cylindrical Grinders

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CRG CNC

CRG, CRG-AW & CRG-A Series High Precision CNC Cylindrical Grinder

KAAST Machine Tools introduces CRG, CRG-AW & CRG-A series CNC cylindrical grinders with superb grinding capabilities and choice of control options. The customers’ requirements can be met with a choice of many machine options such as a touch probe, automatic sizing device, or swing down ID grinding attachment. The complete product line offers a wide range of between center distances and center heights in both plunge and angular wheel head designs. Automation and turnkey solutions are available upon request.

CRG, CRG-AW & CRG-A Series grinders are designed for high precision, high efficiency, and ease of operation. They are suitable for various applications including but not limited automotive, aerospace, medical instrument, tooling, job shop, and mold and roll grind industries.

A selection of CNC control systems including Fanuc, Mitsubishi, and Siemens are available. For small and medium size workpiece grinding operations, e-tech incorporates the iGrind graphic conversational programing software. Advanced machine concept, innovative design and cutting-edge components from reputable manufacturers are key elements which characterize these CNC cylindrical grinding machines.

Standard grinding cycles include dressing of the wheel, as well as grinding cycles of concave and convex surfaces. Specially designed fine feeds allow grinding results with mirrored surfaces, to an accuracy of 0.1 micron. A heavy Meehanite cast frame, heat treated and stress relieved, provides a solid foundation for the CRG CNC cylindrical grinding machines.

All guideways are hardened and precision ground to ensure permanent accuracy and wear resistance. Another highlight of this series is the special table design, which uses a hydrostatic system for extremely smooth motion and precision. The grinding spindle is made of high-quality steel and uses a high-precision hydrostatic spindle bearing that excludes metal-to-metal contact and thus guarantees a true running accuracy of 0.5 microns. A wide range of options for your special applications are available on request.

CRG CNC • Plunge-type Cylindrical Grinder
CRG-AW • Angular-type Cylindrical Grinder
CRG-A • Plunge-type Cylindrical Grinder with Angular head

Standard Configuration

  • Fanuc CNC control (2 axles)
  • Including grinding wheel flange (Balanced and mounted)
  • Precision glass scale in the X-axis
  • Diamond dresser (can be mounted on the table)
  • Separate hydraulic unit with oil/air cooling
  • Coolant system
  • Work zone halogen lighting
  • Fixed centers (2 pcs)
  • Operating tools
  • Manual

Optional Configuration

  • Internal grinding unit
  • Coolant system with paper filter or magnetic separator
  • Driving dog (various)
  • 2-point steady rest
  • 3-point steady rest
  • Touch probe for axial positioning of work pieces
  • Automatic grinding wheel balance counter system
  • Grinding wheel Balancing stand and balancing shaft (manually)
  • Automatic IN PROCESS work piece measurement
  • Oil / coolant mist extraction
  • Hydraulic tailstock
  • Headstock with bore Ø80mm
  • Complete enclosure of the working space
  • Precision glass scale in the Z-axis
  • Automatic loading and unloading
CRG CNC • Plunge-type Cylindrical Grinder
CRG-AW • Angular-type Cylindrical Grinder
CRG-A • Plunge-type Cylindrical Grinder with Angular head

Specifications250/500
9 x 20"
320/600
12 x 24"
320/1000
12” x 39”
320/1500
12” x 59”
320/2000
12” x 78”
320/2500
12” x 98”
320/3000
12” x 118”
-
-
380/600
14 x 24"
380/1000
14 x 39"
380/1500
14 x 59"
380/2000
14 x 78"
380/2500
14 x 98"
380/3000
14 x 118"
-
-
500/600
19 x 24"
500/1000
19 x 39"
500/1500
19 x 59"
500/2000
19 x 78"
500/2500
19 x 98"
500/3000
19 x 118"
Swing over tableCRG CNC 250Ø250 mm (Ø9.8")-
CRG CNC 320-Ø320 mm (Ø12.6")
CRG CNC 380-Ø380 mm (15")
CRG CNC 500-Ø500 mm (20")
Max grinding diameterCRG CNC 250Ø250 mm (Ø9")-
CRG CNC 320-Ø300 mm (Ø11.8")
CRG CNC 380-Ø360 mm (14")
CRG CNC 500-Ø480 mm (19")
CAPACITY
Distance between centers500 mm (19.6")600 mm (23.6")1000 mm (39")1500 mm (59")2000 mm (78")2500 mm (98")3000 mm (118")
Max. load between centers80 kg (175 lbs)150 kg (330 lbs)250 kg (550 lbs)
GRINDING WHEEL
Diameter x Width x Bore455x50x127 mm (180x2x5")Ø510x50-100xØ152.4 mm (Ø20x2-4xØ6")
Motor rated power / max. torque3.75kw (5 hp)7.5kW (Opt.11 kW) (10 hp (opt. 15 hp)
Wheel speed1400 rpm1250 (Opt.1650) rpm
WORKHEAD
Swiveling angle90°
Spindle speed (infinite variable)10 ~ 600 rpm
Motor rated power0.75 kw (1 hp)
Center taperMT3 (Opt.MT4)MT4 (Opt. MT5)
TAILSTOCK
Quill travel25 mm (1")25 (Opt.50/75) mm (1" (opt. 0.96/2.95"))
Center taperMT3 (Opt.MT4)MT4 (Opt. MT5)
X-AXIS
Travel200 mm (7.8")270 mm (10.6")
Max rapid feedrate6 m/min (236"/min)
Min. increment0.0001 mm (0.000004")
Z-AXIS
Travel750 mm (29.5")850 mm (33.4")1250 mm (49")1850 mm (73")2450 mm (96")3050 mm (120")3650 mm (144")
Swiveling angle±7°±9°±7°±5°±3°±2°
Max. rapid feedrate8 m/min (26 '/min)10 m/min (33'/min)
Min. increment0.0001 mm (0.000004")
MACHINE
WeightCRG CNC 2503100 kg (6820 lbs)-
CRG CNC 320-5600 kg (12320 lbs)5900 kg (12900 lbs)6300 kg (13860 lbs)6700 kg (14740 lbs)7100 kg (15620 lbs)7500 kg (16500 lbs)
CRG CNC 380-5700 kg (12540 lbs)6000 kg (13200 lbs)6400 kg (14080 lbs)6800 kg (14960 lbs)7200 kg (15840 lbs)7600 kg (16720 lbs)
CRG CNC 500-5800 kg (12320 lbs)6100 kg (12900 lbs)6500 kg (13860 lbs)6900 kg (14740 lbs)7300 kg (15620 lbs)7700 kg (16500 lbs)

Specifications250/500
9 x 20"
320/600
12 x 24"
320/1000
12” x 39”
320/1500
12” x 59”
320/2000
12” x 78”
-
-
380/600
14 x 24"
380/1000
14 x 39"
380/1500
14 x 59"
380/2000
14 x 78"
-
-
500/600
19 x 24"
500/1000
19 x 39"
500/1500
19 x 59"
500/2000
19 x 78"
Swing over tableCRG CNC 250Ø250 mm (Ø9.8")-
CRG CNC 320-Ø320 mm (Ø12.6")
CRG CNC 380-Ø380 mm (15")
CRG CNC 500-Ø500 mm (20")
Max grinding diameterCRG CNC 250Ø250 mm (Ø9")-
CRG CNC 320-Ø300 mm (Ø11.8")
CRG CNC 380-Ø360 mm (14")
CRG CNC 500-Ø480 mm (19")
Infeed angle60°
CAPACITY
Distance between centers500 mm (19.6")600 mm (23.6")1000 mm (39")1500 mm (59")2000 mm (78")
Max. load between centers80 kg (175 lbs)150 kg (330 lbs)250 kg (550 lbs)
GRINDING WHEEL
Diameter x Width x BoreØ510x50xØ127 mm (5")Ø510x50-100xØ152.4 mm (6")
Motor rated power / max. torque3.75kw (5 hp)7.5kW (Opt.11 kW) (10 hp (opt. 15 hp)
Wheel speed1400 rpm1250 (Opt.1650) rpm
WORKHEAD
Swiveling angle90°
Spindle speed (infinite variable)10 ~ 600 rpm
Motor rated power0.75 kw (1 hp)1.5 kw (2 hp)
Center taperMT3MT4 (Opt. MT5)
TAILSTOCK
Quill travel25 mm (1")25 (Opt.50/75) mm (1" (opt. 0.96/2.95"))
Center taperMT3 (Opt.MT4)MT4 (Opt. MT5)
X-AXIS
Travel200 mm (7.8")270 mm (10.6")
Max rapid feedrate6 m/min (236"/min)
Min. increment0.0001 mm (0.000004")
Z-AXIS
Travel750 mm (29.5")850 mm (33.4")1250 mm (49")1850 mm (73")2450 mm (96")
Swiveling angle±7°±9°±7°±5°
Max. rapid feedrate8 m/min (26 '/min)10 m/min (33'/min)
Min. increment0.0001 mm (0.000004")
MACHINE
Weight3100 kg (6820 lbs)5600 kg (12320 lbs)5800 kg (12760 lbs)6300 kg (13860 lbs)6700 kg (14740 lbs)
Specifications380/600A
15 x 24"
380/1000A
15 x 39"
380/1500A
15 x 59"
380/2000A
15 x 78"
500/600A
19 x 24"
500/1000A
19 x 39"
500/1500A
19 x 59"
500/2000A
19 x 78"
SWING OVER TABLE
CRA-A 380Ø380 mm (15")
CRG-A 500Ø500 mm (19.5")
MAX GRINDING DIAMETER
CRA-A 380Ø380 mm (15")
CRG-A 500Ø480 mm (19")
Distance between centers600 mm (23.6")1000 mm (39")1500 mm (59")2000 mm (78")
Max. load between centers150 kg (330 lbs)250 kg (550 lbs)
GRINDING WHEEL
Diameter x Width x BoreØ510x50-100xØ152.4 mm (6")
Motor rated power / max. torque7.5kW (Opt.11 kW) (10 hp (opt. 15 hp)
Wheel speed1250 (Opt.1650) rpm
Swiveling angle90°
WORKHEAD
Spindle speed (infinite variable)10 ~ 600 rpm
Motor rated power1.5 kw (2 hp)
Center taperMT4 (Opt. MT5)
TAILSTOCK
Quill travel25 (Opt.50/75) mm (1" (opt 2"/3")
Center taperMT4 (Opt. MT5)
X-AXIS
Travel270 mm (10.6")
Max rapid feedrate6 m/min (19 '/min)
Min. increment0.0001 mm (0.000004")
Z-AXIS
Travel850 mm (33.4")1250 mm (49")1850 mm (73")2450 mm (96")
Swiveling angle±9°±7°±5°
Max. rapid feedrate10 m/min (33'/min)
Min. increment0.0001 mm (0.000004")
WEIGHT
CRA-A 3805600 kg (12,320 lbs)6000 kg (13,200 lbs)6400 kg (14,080 lbs)6800 kg (14,960 lbs)
CRG-A 5005800 kg (12,760 lbs)6100 kg (13,420 lbs)6500 kg (14,300 lbs)6900 kg (15,180 lbs)

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*The above specifications are subject to change without prior notice. No liability for printing mistakes. Machine may be shown with optional equipment.

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