✅ Stress Relief: Prevents stress concentration at the end of the threaded portion. ✅ Assembly: Ensures the mating part (nut or shoulder) seats perfectly against the abutment. ✅ Grinding: Provides the necessary space for thread grinding wheels to exit.
On technical drawings, the undercut is often indicated with a simplified callout: tabella gola uni iso 4755
: Senza la gola, la "fuga" del filetto impedisce al dado o alla flangia di toccare la spalla del bullone. Riduzione delle tensioni ✅ Stress Relief: Prevents stress concentration at the
There are typically two types of ends defined: On technical drawings, the undercut is often indicated
La è la norma tecnica di riferimento che stabilisce la geometria e le dimensioni delle gole di scarico per la bulloneria e altri elementi con filettatura metrica ISO esterna. Questa lavorazione è fondamentale nella meccanica di precisione per permettere il corretto accoppiamento a battuta tra componenti filettati e per facilitare l'uscita dell'utensile durante la tornitura. Cos'è la Gola di Scarico UNI ISO 4755?
: It provides clearance for the assembly of mating parts (like a nut or a flange) to sit flush against the fastener's shoulder, as threads cannot be cut perfectly to the very edge of a solid wall. : The undercut dimensions are determined by the thread pitch ( Diameter ( : Typically at least smaller than the thread's minor diameter. : Generally recommended to be between for normal applications. Transition : It often includes a radius or chamfer (e.g., 45 raised to the composed with power
In conclusion, the significance of the UNI ISO 4755 standard cannot be overstated. It not only serves as a guide for current practices but also paves the way for future innovations and collaborations on a global scale.
