Threading Technology – Clamping Technology 520

235 UNC UNF UN M MF NPSF Rp (BSPP) G BGF W BSW, BSF NPT NPTF Rc (BSPT) STI SELF-LOCK Accessories Tech. Info v c / f z ZBGF GSF (Aero) GSF-Z GF(I), GF-Z GF-Vario-Z GF-H GF(I)-KEG ZGF(I) CIRC-GF Gigant FPC, FMC MoSys Product Finder Drill Thread Mills BGF With 2 Flutes With 3 Flutes BGF-Z2 BGF-Z3 Metric Shank Metric Shank Page 236 UNC 237 UNF 238 239 M 240 MF 241 STI-M Possible modifications Face chamfer on the drill part AZR/AZ (alternating teeth) Remove incomplete thread Coolant grooves along the shank For a description of these modifications, see page 357 Thread milling cycle 1 / 2 P 1 P 1 / 2 P 1 / 3 P