March 28, 2025
Interesting facts
Review of the Fisch Forstner Bits
The production of precision files developed from the watch industry based in Switzerland. Today, Swiss precision files are essential in almost all areas where manufacturing or repair takes place due to their shape accuracy and cutting performance. In Germany, they carry the brand Fr. Dick. The precision files have a hardness of 66 - 67 HRC.
Habilis files are files with handle and cut made from a single piece. They are characterized by high maneuverability. The cut length is 100 mm.
| Cut scale for precision files with a length of 100 to 200 mm (4" to 8"): | ||||||||
|---|---|---|---|---|---|---|---|---|
| Number of cuts/teeth per cm: | 16 | 20 | 25 | 31 | 38 | 46 | 56 | 68 |
| General designation: | coarse |
medium |
fine |
|||||
| File with 100 mm length (4") | 1 | 2 | 3 | 4 | 5 | 6 | ||
| File with 125 mm length (5") | 1 | 2 | 3 | 4 | 5 | 6 | ||
| File with 150 mm length (6") | 1 | 2 | 3 | 4 | 5 | 6 | 8 | |
| File with 200 mm length (8") | 1 | 2 | 3 | 4 | 5 | 6 | 8 | |
| Cut scale for precision files with a length of 250 to 300 mm (10" to 12"): | ||||||
|---|---|---|---|---|---|---|
| Number of cuts/teeth per cm: | 12 | 16 | 20 | 25 | 31 | 38 |
| General designation: | coarse |
medium |
fine |
|||
| File with 250 mm length (10") | 1 | 2 | 3 | 4 | 5 | |
| File with 300 mm length (12") | 2 | 3 | 4 | 5 | ||
| Swiss cut scale for habilis files: | ||
|---|---|---|
| Number of cuts/teeth per cm: | 25 | |
| General designation: | fine | |
| Habilis file total length 215 mm (8 1/2 in.) | 1 | |