FIELD: mechanical engineering, in particular, cutting of thread in difficult-to-work materials. SUBSTANCE: tap borer has gaging part and threading part with teeth having heights reducing in staggered arrangement. Reduction value of teeth of threading part exceeds cut thickness and less than or equal to 1/3 the height of each tooth having reducing height. EFFECT: increased efficiency, simplified method and improved quality of cut thread. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SCREW TAP | 1998 |
|
RU2151672C1 |
| SCREW TAP | 1998 |
|
RU2151673C1 |
| COMPOSITE THREADING DIE | 1992 |
|
RU2043883C1 |
| TAP | 0 |
|
SU1804379A3 |
| MACHINE TAP | 2014 |
|
RU2566094C1 |
| TAP | 2010 |
|
RU2451581C2 |
| TAP | 0 |
|
SU1148735A1 |
| TAP FOR CUTTING PRECISE THREADS | 0 |
|
SU753568A1 |
| A SET OF TAPS FOR CUTTING THREAD IN METALS HARD TO MACHINE | 0 |
|
SU1085719A1 |
| TAPPING DIE | 0 |
|
SU1152733A1 |
