FIELD: metal working, namely, structures of screw taps for threading hard-to-work materials. SUBSTANCE: screw tap has sizing portion including at least one full-profile tooth and teeth whose profiles are lowered at lateral sides. Teeth with lowered lateral sides have at both sides of thread contour non-lowered portions and near roots of teeth - non-lowered portions at side of stem. EFFECT: enhanced strength of tool, especially at threading hard-to-work materials. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SCREW TAP | 1998 |
|
RU2151672C1 |
| TAP BORER | 1996 |
|
RU2103121C1 |
| COMPOSITE THREADING DIE | 1992 |
|
RU2043883C1 |
| MACHINE TAP | 2014 |
|
RU2566094C1 |
| TAP | 1992 |
|
RU2087271C1 |
| TAP | 0 |
|
SU1804379A3 |
| TAP | 0 |
|
SU1763113A1 |
| TAP DIE | 0 |
|
SU1215245A2 |
| METHOD OF MAKING TAPS FOR CUTTING PRECISION THREAD | 0 |
|
SU872081A2 |
| TAP | 0 |
|
SU1703314A1 |
