Общий каталог Yamawa 2022 - 2023 - страница 1225

―Carbon steel ― fz （mm/t） ■Comparison of internal threads cut by helical cutter and by PT tap 0.15 ■Pipe thread cutting by tap When PT tap cuts internal threads, the tap cuts the threads with all cutting edges and the 0.10 tap reverses from the position where each cutting edge on lands sticks into the material Possible cutting range wall of internal threads. This results in the stop line due to a step caused by this sticking. Recommended 0.05 cutting range ■Pipe thread cutting by helical cutter Due to the thread cutting of 3 axis movement without reversing, the internal thread has no stop line. 0.00

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Selection of tool diameter against the size of the internal threads Vc （m/min） When cutting internal threads with MC-HLC, please choose the tool which diameter is ―Alloy steel ― smaller than 70% of internal threads diameter. The cutter having larger outside diameter is preferable due to its high rigidity. fz （mm/t）

Thread milling cutters do not have screw lead. Please select thread milling cutters by referring to product specification table to avoid poor threads 0.15 caused by interference. ■Cutting conditions 0.10 ○For MC-CSLC Possible cutting range ―Stainless steel ― Recommended Recommended 0.05 cutting rangecutting range

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Vc （m/min） ―Tool steel ― fz （mm/t） 0.15

0.10 Possible cutting range 0.05 RecommendedRecommended cutting rangecutting range 0.00

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Vc （m/min） ―Cast iron― fz （mm/t） 0.15

MC-ヘリカルカッタを使用する場合の切り込み量は、一般的にねじ山 Possible cutting range の高さの分を1回で加工するように機械を設定しますが、設定の基準 は内径で（下穴）基準と工具基準が考えられます。MC-ヘリカルカッタ 0.10 は、工具の谷部では切削しないようになっています（管用のRc、Rp は Recommended 除く）ので、下穴径はタップと同じにします。 cutting range 0.05 Technical Inf 0.00 Vc（m/min）