Silca Idea - Page 25

Copyright Silca 2004 21
Operating Manual - English IDEA
- The cutting tool is brought into contact with the bit at reduced speed to determine the size, then the tool
withdraws to the safety distance before beginning the next cut.
- The purpose of the entire procedure is to reduce the backwards and forwards movement of the cutting
tool, limiting its excursion to within a new safety measurement of 2 mm beyond the edge of the bit, thereby
accelerating the cutting process.
Fig. 22
C UTTING
- On taking the key up to the cutting tool, the rotating clamp imposes an anticlockwise angle of -30° to the
transversal axis of the bit, thus facilitating cutting by providing a single direction (+60° clockwise) for the
cutting radius after the depth for the tooth being cut has been reached.
Fig. 23
- At the end of the cutting operation on the left-hand bit, the cutting tool trims the bit up to the stem (diameter
read from the original key) thereby rectifying the diameter of the stem as the key turns simultaneously,
together with the removal of any portion of bit which exceeds the length of the original.
Fig. 24
2 mm
+60°
-30°
30°
30°
R2
R1
+180°
-60°