PRAD system PRAD system S o l u t i o n t o o l PRoduct Version of special tap According to Demand manufacturing Case No.9 I need a M8 × 1 tap for tapping through holes in hardened materials! Tapping Condition Standard blank Workpiece Materials S55C tempered steel(30HRC) Machine MC Feed Synchronous feed Cutting Fluid Water soluble cutting fluid Bore Hole Size φ7.1 Bored Hole Length 15mm(through hole) Tapping Length 15mm Tapping Speed 12.5m/min Step 1 is grinding the flute. ◦ Original flute design ◦ Add a coating A completed left hand spiral fluted tap PRAD SYSTEM for through holes to tap medium-hard carbon steels! Case No.10 I need an oversize thread inspection tool for a M20 × 2.5 (GB) GO gage. Intended use Standard blank Workpiece Materials SCM440 Effective thread 20mm(through hole) length Classes of Class II+30(μm) Internal Threads Since the internal threads can shrink during the hardening Reason for process, we produce oversize taps oversize for this application. This simple inspection tool is for checking II+30 oversize internal thread. Step 1 is grinding the flute. ◦ Specifications for a simple thread inspection tool A completed simple inspection tool for a M20 × 2.5 (GB) GO gage! PRAD-6