Общий каталог Yamawa 2021 - страница 405

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Carbide Taps Intro UH-CT MS Material Specific Series SP Carbide Taps for Ultra Hard Materials (<63HRC), Coated FEATURES SL HF COATINGCARBIDE SYNCHRO 5P Carbide taps for high hardness steel (55 ÷ 63HRC).Specific design, ultra fine micrograin, suitable coating forTHCHTlong and stable tool life. 5P chamfer length. PO Recommended Tapping Speeds Depending On Materials ISO Vc (m/min) H1 ≤5 H H2 ≤5 H ST H 1st choice I suitable ROLL DIN-UH-CT Process Data CARBIDE Work-material tool steel, heat-treated (60HRC) DIN Hardness 50HRC UH-CT 60 holes Size M8x1.25 LONG Tapping length 16mm, through hole Machine CNC rigid tapping machine Competitor 8 holes Tapping speed 1.5m/min (60rpm) Lubricant non-soluble oil HAND Number of tapped holes TAPS The graph above shows comparison data in tapping heat-treated tool steel by conventional carbide tap and UH-CT. Chipping occurred after 8th threads with conventional carbide tap. UH-CT can work efficiently even after 60 threads. EG (STI) The graph on the right shows the relation between the number of tapped holes and the load meter data of the machine on the tapping test up to 60 holes with UH-CT tap. SPECIAL THREADS, Percentage of load meter figure tends to increase after tapping GAUGES 50 holes. This is due to the damage on the tool’s cutting edge. Then, tap breakage will happen if the load meter figure increases more and more. Thus for safety purposes, it is better to limit the THREAD number of tapping holes (tool life) when tapping high hardnesssteel materials. MILLS Number of holes DIES CENTER DRILLS Technical info 406 Load meter (%)