Общий каталог Yamawa 2022 - 2023 - страница 724

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Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools JIS ⑦ Special Thread Taps / Simple Inspection Tools Drill Overall Shank Thread + Neckdia.lengthdia.lengthDcLDsℓn JIS ① ITRD Broken Tap Removal Tools ② Specification Coating ③ ④ ■Product Features ●The unique cutting edge shape is adopted so that a broken high-hardness cutting tap can be removed. The tap can be removed by drilling a hole in its center. ●Wear resistance of the tool is improved by special coating and ultra micro grain cemented carbide resistant to machining the high-hardness HSS tap. ■Machining case 1 (for spiral fluted taps) ⑤ Machining conditions Tool condition Tap SP　M12×1.75 Machining Depth 15mm Workpiece Material S50C Machine MC BT40, vertical type Tool ITRD Dc8.5 Cutting Fluid Water soluble cutting fluid, (x20) Revolution Speed 450min-1 Internal Thread Accuracy Gauge OK (after retapping) ⑥ Feed Speed 3mm/min（in 0.3 mm steps） Before removal During removal After removal Fragments of removed tap Fragment of ⑦ internal threadon far side Hard to break For a tap with spiral flutes, such as a spiral fluted tap, since lands of the tap are coiled around the internal thread, the tap does not move easily even during ⑧ removal and its fragments does not come out easily on the way. Therefore, ITRD is most suitable for the removal of spiral fluted taps (35°or more of helix angle). ■Machining case 2 (for hand taps or spiral pointed taps) TTooooll ccoonnddiittiioonn Machining conditions　ITRD Dc-8.5 Tap HT　M12×1.5 Machining Depth 12mm Workpiece Material SCM440 Machine MC, vertical type ⑨ Revolution Speed 460min-1 Cutting Fluid Water soluble cutting fluid, (x20) Feed Speed 3mm/min（in 0.3 mm steps） BBeeffoorree rreemmoovvaall DDuurriinngg rreemmoovvaall AAfftteerr rreemmoovvaall FFrraaggmmeennttss ooff rreemmoovveedd ttaapp ⑩ FFrraaggmmeenntt ooffiinntteerrnnaall tthhrreeaadd oonn eennttrraannccee ssiiddee EEaassyy ttoo bbrreeaakk ⑪ Remarks: F or a tap with straight flutes, such as a hand tap or a spiral pointed tap, deeper machining causes lands ofthe tap to bend more easily, and its fragments to come out easily. Therefore, if any tap fragments come out with unusual sound during removal, stop machining and remove the fragments with a scriber or the like. While doing so, proceed with machining carefully. JIS ⑦-79