On this machine, valves are not centerlined by any collet, but by means driving rollers; the same system used on centeriess grinding. One rest supports the stem of the valve maintaining it exactly in position.
GREATEST WORKING SPEED
Through an automatic device it is possible to insert and to remove the valve form the rest and driving rollers with no need to switch off the machine, so reducing the machining time.
By a setting micrometric device can be obtained the dressing of the wheel, and the grinding of the head of the valve.
|Diameter of valve stem||5-16 mm|
|Grinding wheel diameter||215 mm|
|Grinding wheel speed||2800 RPM|
|Installed horsepower||1 HP|
|Max Valve stem diameter||40 mm|
|Minimum valve head diameter at 45° with steady rest||15 mm|
|Minimum valve head diameter at 45°||200 mm|
|Minimum valve head diameter at 30°||200 mm|
|Grinding wheel motor stroke||95 mm|
|Graduated quadrant stroke||150 mm|
|Minimum length with steady rest 45°||180 mm|
|Minimum length without steady rest 45°||95mm (Valve head diameter 30mm)|
|Minimum length with steady rest 30°||230 mm|
|Minimum length without steady rest 30°||120mm (Valve head diameter 45mm)|
|Grinding angle||20°÷ 60°|