[請益] SUS304攻牙
請問各位版友
是否知道SUS304
在攻深孔牙的時候要放多少轉速
工件孔深21MM牙深19MM
規格M6x0.75
目前轉速有500 400 300 100
但都很容易斷
感謝幫忙
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