Cutting device for manual ceramic-cutting machines

A cutting device for manual ceramic-cutting machines, comprising:

• a support provided with a horizontal hole with one threaded rear section on which a handle is mounted and a vertical hole that receives a cutting tool, the cutting tool comprising a bar provided with:
• a first end accommodated through the vertical hole of the support, a second end carrying a cutting wheel for marking a break line in ceramic pieces to be cut and a front face facing the horizontal hole of the support;
• a stem housed in the horizontal hole of the support capable of longitudinal movement between:
• a front position for locking the cutting tool and a rear position for releasing the cutting tool;
• a front face of the bar of the cutting tool comprises at least one row of adjacent recesses spaced apart vertically, and a front end of the stem comprises at least one projection which, in the front position for locking the cutting tool by means of the stem, the at least one projection is accommodated in one of the recesses of the front face of the bar of the cutting tool;
• wherein the stem comprises an intermediate thickening arranged between a front stop of the support and an annular stop, the annular stop being threadedly mounted into the threaded rear section of the support to adjust the position of the annular stop;
• and
• wherein the cutting device further comprises a spring, the spring arranged inside the horizontal hole of the support and configured to push the stem towards the front position to lock the cutting tool and to push the stem towards the rear position to release the cutting tool;
• wherein a height position of the cutting tool is configured to be adjusted by the handle moving towards the rear section such that the cutting tool moves vertically, as the spring maintains pressure of the at least one projection of the front end of the stem against the bar, and the stem undergoes alternating forward and backward movements as the at least one projection jumps over successive front recesses of the cutting tool bar when subjected to pushing.