* On request.

The Grinding Machine is composed of :
BASE
Structure in normalised and stabilised cast iron with large ground guides. In the middle of the base, there is positioned the re-circulating ball screw with double preloaded nut for the table longitudinal movement. On all the lower part of the perimeter are situated the recesses for machine levelling. Considering the base structure, usually a foundation is not required.
TABLE
The table is manufactured in one piece in normalised and stabilised cast iron. The lower part is lubricated by means of a constant oil flow distributed over the complete length.
WORKHEAD
The structure in normalised, stabilised and well ribbed cast iron, allows to support the workpiece weight and the force generated by the grinding operation. It is equipped with dead and live spindle. The spindle rotates on high precision ball bearings, guaranteeing restricted tolerance and maximum rigidity in the working. The spindle rotation is by means of a a.c. motor and the r.p.m. adjustment is programmable. The spindle rotation may be intermittently manual or automatic. The workhead positioning on the table is facilitated by an air flow.
WHEELHEAD
The wheelhead where the hydrodynamic spindle is located, is constructed in cast iron. The lower carriage slides by means of a re-circulating ball screw with double preloaded nut, on guides covered with anti-friction material. The lubrication of the guides and nut is by means of a timer. The brushless motor which moves the screw, is controlled with a closed ring by the incremental optic rule, which guarantees a positioning precision on the complete stroke of 0,001 mm.
WHEELHEAD SPINDLE
Hydrodynamic type, rotates on anti-friction metal bushes, which guarantees an high finish degree. The rotation is by means of an a.c. motor. On request, the speed may be regulated by an inverter. The transmission is by means of pulleys and Poly-V belt. Also, on on request, the machine may be equipped with a hydrostatic spindle, instead of hydrodynamic, allowing to obtain very fine working surface finishes and higher wheel speed rotations.
TAILSTOCK
Together with the workhead the tailstock supports the workpiece weight and the force generated by the grinding operation. The structure in normalised and stabilised cast iron, is in two parts, so as to permit the cylindrical manual correction. Equipped with hydraulic treadle drive tailstock and safety deviceagainst accidental opening. The spindle opening is possible only when the grinding wheel is in the back position. The workhead positioning on the table is facilitated by an air flow.
HANDWHEELS (N. 2) MANUAL WHEEL AND TABLE FEED
Electronic type. A selector switch is available to change the division from 0.1 to 0.001 mm.
DIAMOND DRESSER
The external diamond dressing device is very strong and is positioned on the tailstock. With this device it is possible to dress the grinding wheel; in linear and with radius on the edges with the interpolation between 'X' and 'Z'.
EQUIPMENT AND ELECTRICAL PLANT
In a cabinet, separate from the machine. This cabinet is degree of protection IP 55.
Complete with: CNC unit, power circuites, starts for the axis motors and various electronic components.
HYDRAULIC PLANT
The hydraulic power pack, is separate from the machine and activates the hydraulic cylinder of the tailstock. Supplied with hydraulic oil.
LUBRICATION PLANT
The lubrication power pack, is separate from the machine and supplies continuous oil to the wheelhead guides and to the re-circulating ball screw nuts, for the working feeds. The recovered oil is filtered and then returned to the power pack.
PNEUMATIC PLANT
Has the function to make lighter, during the manual movements: wheelhead, tailstock and wheelhead over-slide.
COOLANT PLANT
Large capacity tank for the coolant water, complete with electric equipment and coolant paper roll cleaner. Extra outfit, on request coolant magnet cleaner and/or combined system.
PROTECTIONS
For the protection of the operator all movable parts are covered with suitable guards. Precisely: protection casing for belts, protection casing for grinding wheel and bellows for guides. The front protections are sheet sliding doors with poly-carbonate shields. A movable shield in sheet, controlled by a pneumatic cylinder, protects the operator, when the grinding wheel is in rotation and the front sliding doors are open. A safety device, does not permit the automatic cycle to start if the front sliding doors are open.