| 摘要 |
<p>The screw (1) has a cylindrical core (5) with a central longitudinal axis (7). A cutting screw thread (8) extends along a cutting screw thread portion (Asg) and formed with the cylindrical core for cutting a bore hole screw thread in a material and provided with cutting screw thread diameter (Dsg). Cutting edge is located at leading ends of cutting elements (11, 12) along pivoting direction (2). The cutting edge is supported at the cutting screw thread by a supporting portion against the pivoting direction. A screw-in unit (18) acts on the screw with screw-in rotational torque.</p> |
