Tapping screws form mating threads in materials they are driven into. There are two basic types: thread forming and thread cutting. The thread-forming screw displaced material around the pilot hole so ...

Single Profile Thread Mills (SPTM) thread small holes with coarse threads in tough materials — a common mold and valve-industry problem. The tools have a solid-carbide-micrograin substrate with a ...

A technique to manage an unusual presentation of an implant abutment screw fracture is presented. Causes of abutment screw loosening and fracture are reviewed. Design features that improve the ...