CNC Cylindrical Grinder, CNC Cylindrical Grinders

CYLINDRICAL GRINDER
CNC CYLINDRICAL GRINDER (ANGULAR TYPE)
G25A CNC Series

 

 

  • Machine Base

The heavily ribbed box-type base is made of Meehanite casting, providing excellent rigidity to ensure machine stability. Optimum distance between the guideways offers excellent table support to increase Z axis positioning accuracy and repeatability.

  • Work head

The sturdy rigid-designed workhead equipped with precision bearings is electronically controlled giving variable spindle speeds. Workhead swivels 90°counterclockwise to 30°clockwise for various grinding operations. A combination live and dead-type spindle allows for quick changeover from center to chuck operation or vice versa. A dual oil seal and cover prevent coolant seepage into the workhead. 

  • Tailstock

The design of the tailstock is both rigid and robust. Housed in a Meehanite case body, the hardened nitralloy steel sleeve is designed to carry a MT3 center for G25A. Movement of the sleeve is adjusted by a knob to give a light or heavy load. An optional hydraulic tailstock with foot pedal is available for easy loading and unloading of parts.

  • Wheel spindle

A combination of hydrostatic and hydrodynamic bearings, surrounded by a high pressure oil film, eliminates metal-to-metal contact to provide high rigidity as well as high vibration damping performance. A pressure switch interlock prevents spindle start-up until oil pressure is established. The pressure switch interlock also stops the spindle if oil pressure fails. Both features ensure high accuracy and longer spindle life.

  • Saddle

Both the double V and flat guideways are hand scraped and Turcite coated, and utilize an automatic lubrication system, precision ballscrew, AC servo motor and a 0.001mm (0.000020”) linear feedback system. This combination allows for a smooth movement of the wheelhead which delivers a longer way life with superior positioning accuracy and repeatability. The enlarged and properly sloped drainage troughs under the wheelhead base help to control thermal growth and provides the rapid coolant drainage needed during heavy grinding cycles.

  • Work Table

The rigid table with box-type construction travels on a cushion of oil with no metal to metal contact. An automatic lubrication system operates continuously to ensure smooth movement and consistent accuracy. Z-axis positioning accuracy and repeatability is assured with an AC servo motor and high precision, pre-tensioned ballscrews. A swiveling table dial indicator enables rapid cylindrical corrections and taper grinding applications. The table is fully supported over the full travel to avoid any overhang.

  • Automatic Lubrication System

Slideways, ballscrews and spindle are continuously lubricated by an auto-lube system to ensure long service life and maintain maximum accuracy. Hydraulics coolant and lubrication systems are separated from machine to eliminate vibration and dissipate heat.

  • System for Automation

A highly-automated grinding system can be customized with a wide selection of optional equipment including an automatic OD sizing device, gap control, crash control and touch probe for axial positioning.

1. BALANCE SYSTEM 9.5C COLLETS 17.Z-AXIS DIGITAL READOUT
2. CRASH CONTROL 10.3-JAW SCROLL CHUCK 18.SPARE GRINDING WHEEL
3. GAP CONTROL 11.-JAW CHUCK 19.SPARE WHEEL FLANGE
4. TOUCH PROBE 12.4-JAW SCROLL CHUCK 20.LUBE OIL TEMPERATURE REGULATOR
5.AUTO SIZING DEVIC 13.FIXED BACK PLATE 21.OIL-MIST SEPARATOR
6.I.D ATTACHMENT(VARIABLE) 14.ADJUSTABLE BACK PLATE 22.FULL-ENCLOSURE SPLASH GUARD
7.SHAFT 15.2-POINT STEADY REST  
8. 5C COLLET CLOSER 16.3-POINT STEADY REST  
 
    G25A-35CNC
General Capacity Swing over Tabel (mm) Ø250
Distance between Centers  (mm) 350
Max. Grinding Diameter  (mm) Ø250
Max. Load Held between Cenetrs   (kg) 80
Grinding Wheel Diameter x Width x Bore  (mm) Ø455 x 50 x Ø127
Wheel Speed (rpm) 1650
Max. peripheral Speed (M/min) 1800
Wheelhead Sliding Angle Deg 60°
Max. increment Speed  (M/min) 4
Infeed Travel  (mm) 160
Min. Increment Infeed  (mm) Ø0.001
Workhead Spindle Speed (Variable)  (rpm) 50~500
Center Taper (MT) MT 3
Spindle Type  Fixed & Rottary
Diameter of Bore (mm) Ø20
Tailstock Quill Travel (mm) 25
Center Taper (MT) MT 3
Table Rapid Feedrate(M/min) 8
Min. Increment Feed  (mm) 0.001
Swivelling Angle C.C.W
Motor Wheel Spindle Motor  (HP) 7.5
Workhead Motor  (HP) 1/2
Lubrication Pump  (HP) 1/4
Hydraulic Pump (HP) 1
Coolant Pump  (HP) 1/8
Wheel (X-axis) Motor  KW(Fanuc) 1.2
Wheel (Z-axis) Motor  KW(Fanuc) 1.2
Machine Net Weight (semi enclosed) (kg) 3100
Cross Weight (kg) 3500
Packing Dimension (L x W x H) (mm) 2970x2250x2250
 Remark:We reserve the right to modify the specification relating to any of the above machines wirhout  
               notice.