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Precision Cylindrical Grinding Machine SRB Precision Cylindrical Grinding Machines are designed and manufactured to achieve high accuracies of roundness and Cylindricity of jobs. It has separate Internal and External grinding heads, suitable for both production as well as Toolroom applications.
MACHINE BED
Close grained Graded casting (FC 25) having Box structured adequately Ribbed design, provides very high Rigidity and Thermal stability in Long Run.
WORK HEAD
The machine has Rigid Universal Work Head. It has an alloy steel Spindle running in unique Hydrodynamic Bearings having self-alignment of clearance for different speeds. During Dead centre grinding a simple adjustment completely eliminates the clearance in the bearing thus providing rigid support to the jobs. The bearing arrangement gives wear free operation.
WHEEL HEAD
The wheel head has' a very rigid Spindle running in Hydrodynamic Multi-point Bearings. The Spindle is made of alloy steel, specially heat treated (sub-zero) to achieve high accuracy and stability for long life. Spindle cartridge unit is easily interchangeable.
INTERNAL GRINDINGHEAD
Internal Grinding Head is mounted separately on the Infeed slide thus providing a Rigid support to the
Spindle giving better Surface finish in grinding. Internal grinding operations can be done after removing External wheel.
TAIL STOCK
The Quill is carried in precision preloaded antifriction sleeve and is kept under adjustable spring load. A Dresser block is also mounted on the Tailstock body.
INFEED SYSTEM
The infeed system moves on pre-loaded Linear Guideways. This guarantees high repetitive accuracy and stick-slip tree fine movement ofthe slide. Infeed is given through an hardened and precision ground cam. Grinding allowance and the required steplessly variable coarse and fine infeed rates can be pre-selected on Automatic versions. The automatic grinding cycle operates as follows.
RAPID APPROACH - COARSE FEED - FINE FEED - SPARK OFF - RAPID RETRACTION OF THE WHEEL HEAD AND THE INFEED HAND WHEEL TO THE PRE-SELECTED POSITION. This cycle also starts/stops the work head motor and the coolant motor automatically. The machine is also capable of interfacing with in-process gauging units as options.
LUBRICATION
The infeed slide is grease-packed for life. The table slide with Turcite is provided with automatic lubrication trom Hydraulic system.
COOLANT SYSTEMS
Variety of coolant filtration systems are available. From Bame tray (standard) to magnetic, paper cum magnetic type filtration systems as optional.
"S" Models with Hydraulic Rapid and Table movement & Manual infeed also available.
IN FEED THROUGH STEPPER MOTOR
(ONLY FOR "E" MODELS)
Wheel infeed is controlled by an electronic control system through a stepper motor drive.
TECHNICAL SPECIFICATIONS :- GC-125 A/S
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SPECIFICATIONS
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U/M
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GC-12
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CAPACITIES
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Centre Height
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mm
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125
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Admit between centre
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mm
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600
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Grinding Length
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mm
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400
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Max. Weight between center
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kg
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25
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LONGITUDINAL SLIDE
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Table Speed
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Mtr/Min
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0.1-5
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Max. Travel
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mm
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400
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Min. Automatic Travel (appx.)
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mm
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2.5
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Max. Swivel of Table
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deg.
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30
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IN-FEED SYSTEM
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Rapid Approach
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mm
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40
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Infeed with hand wheel
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mm
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20
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Max.plunge depth on Dia#
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mm
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1.7
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Infeed on Dia(coarse)#
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mm/min
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0.0 I 5-6
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Infeed on Dia(fine)#
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mmlmin
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0.015-3
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Spark off time#
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sec
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0-60
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Min incremental infeed on Dia
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mm
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0.001
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WHEELHEAD
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Grinding Wheel(OD x width x Bore)
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mm
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300X40XI27
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Min Wheel With Zero Job
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mm
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220
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Power
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kW
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2.2
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Grinding Speed
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Mtr. / Sec
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30/45*
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WORK HEAD
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Spnidle Speeds(8steps)
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rpm
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56-630
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Spnidle Nose Taper
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MT
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4
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Power
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kW
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0.16/0.32
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Swivel range
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Deg.
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0-90
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TAIL STOCK
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Quil Travel
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mm
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20
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Spindle Nose Taper
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MT
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3
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INTERNAL GRINDING HEAD
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Spindle Housing Bore Dia
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mm
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60/80*
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Spindle Speed(Std)
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RPM
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18000
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Power
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KW
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I.1
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GUARANTEED ACCURACY
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Roundness on live spindle(on standard piece Dia.80mm)
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Standard
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mm
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0.002
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Special Equipment
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mm
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0.001
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Cylindricity over 400mm
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mm
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0.002
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GENERAL
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Total power requirement
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KW
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4.5
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Total Weight appx
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Kg
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1800
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