Close grained Graded casting (GR 25) having Box structured adequately Ribbed design,provides very high Rigidity and thermal stability in long Run.
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 center 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.
|Spindle Speeds (8 Steps)||rpm||90-1000||63-630|
|Spindle Nose Taper||MT||4||5|
The wheel head has a very rigid Spindle running in Hydrodynamic Multi-point Bearings . The Spindle is made of alloy steel, specially heat treated to achieve high accuracy and stability for long life, Spindle cartridge unit is easily interchangeable.
|Grinding wheel (OD x width x Bore)||mm||300x40x127||400x40x127/|
|Min. Wheel with Zero job||mm||220||280|
Internal Grinding Head
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 operation can be done after removing External wheel.
|INTERNAL GRINDING HEAD|
|Spindle Housing Bore Dia.||mm||80||80|
The Quill is carried in precision pre-loaded antifriction sleeve and is kept under adjustable spring load.Dresser block is also mounted on the Tailstock body.
The infeed system moves on pre-loaded Linear Guideways. This guarantees high repetitive accuracy and stick-slip free fine movement of the slide. Infeed is give throughs an hardened and precision ground cam.Grinding allowance and the requied steplessly versions.The automatic grinding cycle operates as follows.
Rapid Aprroch-Coarse Feed-Fine Feed-Spark Off-Rapid Retrection of the Wheel Head 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 inprocess gauging unites as options.
|Infeed with hand wheel||mm||20||20|
|Max plunge depth on Dia.#||mm||1.7||1.7|
|Infeed on Dia. (coarse)#||mm/min.||0.015-3||0.015-6|
|Infeed on Dia (fine)#||mm/min.||0.015-3`||0.015-3|
|Spark – off time#||sec||0-60||0-60|
|Min Incremental infeed on Dia||mm||0.001||0.001|
The infeed slide is grease-packed for life.The table slide with Trucite is provided with automatic lubrication from Hydraulic system.
Variety of coolant filtration sysems are available.From Baffle tray (standard) to mangetic,paper cum magetic type filtration system as optional.
“S” Models with Hydraulic Rapid Table movement & Msnual infeed alos available.