FIELD: forestry industry. SUBSTANCE: outside surface of the entering part of the cutting head of the borer is made according to the radius whose value is given in the description. A cam with one or more tops is made on the cutting head. The cam tops are disposed between the thread turns, and their height is equal to the of the thread. The tubular case of the borer consists of three parts. The cutting head and the stem are made of more expensive cutting steels. The middle part is made of cheaper steels. EFFECT: simpler design. 1 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| CORE CYLINDRICAL BORE FOR WOOD | 0 |
|
SU1762151A1 |
| BORER FOR EXTRACTION OF WOOD CORE | 1999 |
|
RU2163865C1 |
| DRILL FOR WOOD CORE RECOVERY | 2014 |
|
RU2633791C2 |
| CUTTING PART OF DRILL FOR WOOD CORE EXTRACTION | 1998 |
|
RU2158676C2 |
| AUGER FOR TAKING WOOD CORES | 0 |
|
SU1708617A1 |
| 0 |
|
SU146590A1 | |
| DEVICE FOR INSTALLATION OF INCREMENTAL INDICATOR IN FORM OF ROD WITH POINTED END IN OPERATING POINT | 2007 |
|
RU2370022C2 |
| SELF-CUTTING SCREW | 0 |
|
SU651721A3 |
| COMBINED EXTRACTOR FOR DAMAGED BONE SCREWS | 2015 |
|
RU2642382C2 |
| CONSTRUCTIVE SOLUTION OF MULTI-HEIGHT CONTOUR OF GROOVE WITH VARIABLE DULLED EDGES FOR ENDODONTIC FILES | 2006 |
|
RU2375986C2 |
