Precision Cylindrical Grinding Machine By J. R. Rao & Co.

With
our years of experience and market knowledge, we are capable of
offering our clients a wide range of Precision Cylindrical
Grinding Machine. Provided
machine is used to achieve high accuracies of roundness and
cylindricity of jobs. Designed as per international quality
standards, this machine has separate internal and external grinding
heads that is suitable for both production as well as toolroom
applications. Clients can avail offered Precision
Cylindrical Grinding Machine
from us in several designs and specifications at negotiable price.
Features:

Robust construction

optimum performance

Thermal stability

Vibration resistance

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






SPECIFICATIONS


U/M


GC-12




CAPACITIES












Centre Height


mm


125




Admit between centre


mm


600




Grinding Length


mm


400




Max. Weight between center


kg


25




LONGITUDINAL SLIDE




Table Speed


Mtr/Min


0.1-5




Max. Travel


mm


400




Min. Automatic Travel (appx.)


mm


2.5




Max. Swivel of Table


deg.


30




IN-FEED SYSTEM












Rapid Approach


mm


40




Infeed with hand wheel


mm


20




Max.plunge depth on Dia#


mm


1.7




Infeed on Dia(coarse)#


mm/min


0.0 I 5-6




Infeed on Dia(fine)#


mmlmin


0.015-3




Spark off time#


sec


0-60




Min incremental infeed on Dia


mm


0.001




WHEELHEAD












Grinding Wheel(OD x width x Bore)


mm


300X40XI27




Min Wheel With Zero Job


mm


220




Power


kW


2.2




Grinding Speed


Mtr. / Sec


30/45*




WORK HEAD












Spnidle Speeds(8steps)


rpm


56-630




Spnidle Nose Taper


MT


4




Power


kW


0.16/0.32




Swivel range


Deg.


0-90




TAIL STOCK












Quil Travel


mm


20




Spindle Nose Taper


MT


3




INTERNAL GRINDING HEAD












Spindle Housing Bore Dia


mm


60/80*




Spindle Speed(Std)


RPM


18000




Power


KW


I.1




GUARANTEED ACCURACY




Roundness on live spindle(on standard piece
Dia.80mm)




Standard


mm


0.002




Special Equipment


mm


0.001




Cylindricity over 400mm


mm


0.002




GENERAL












Total power requirement


KW


4.5




Total Weight appx


Kg


1800