The SOLO tool system allows front or back or only back spotfacing and countersinking with high process reliability. It enables the production of countersinks at the back of the work piece without requiring the work piece to be turned, without right-hand / left-hand rotation of the spindle, without torque bracket, without stopping mechanism, without coolant pressure or other aids. The SOLO tool system can immediately be used on any machine (CNC, transfer, multi-spindle or conventional).

The SOLO blade, which can be radially retracted and extended, rules out jamming of chips. The carbide blade can be changed by hand directly on the machine without requiring additional tools. The control unit is completely sealed to keep out dirt and coolant. Carbide blades with material-specific cutting geometries and coatings as well as the inner coolant supply directly onto the blade behind the work piece ensure a long service life. All this guarantees a high level of process reliability and optimal availability for large production runs.

Typical applications include screw head countersinks or faces on fork parts, planet carriers, flanges, general work pieces with subsequent bores or hard-to-reach points.

Each SOLO tool system is specified to suit the particular application. It can be used for bore diameters (d) from about 6 mm to about 25 mm; for the maximum countersink diameter (D), the following applies: 2xd-1.

Countersinking is carried out from the same side as previous drilled. A control unit that is sealed to keep out contaminants and coolant incorporates two centrifugal weights. When the spindle is stopped, the centrifugal weights are located in the center. When the spindle is started for the activation RPM, the centrifugal weights move outwards until they meet a stop. When the spindle stops, return springs draw the centrifugal weights back to their home position. A gearing transforms this radial motion into a rotary motion and transmits it to the blade control. An eccentrically positioned bolt in the blade control engages in a groove on the blade. As soon as the blade control rotates, the blade held by the blade housing so that it can be moved is radially retracted or extended. Retraction and extension of the blade at the activation RPM or spindle stop are abrupt and without delay. The fixed positions of the retracted and extended blades are pre-defined and cannot be modified by any force acting on the blade from the outside. The blade can only be moved out of the two fixed positions by activation RPM or spindle stop.

1. Tool head
2. Shank
3. Blade housing
4. Blade control
5. Blade

The SOLO tool head is available in stock in two versions. The SOLO for machining materials with high cutting speeds. The SOLO2 for machining materials with low cutting speeds. 

The blade housing, blade control and blades are specified to suit each particular application.