10841| 17
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201的角鋼打孔,鉆頭打不進(jìn)去,氧氣燒紅以后再打,也還是打不進(jìn) |
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點(diǎn)評(píng)
普碳鉆頭硬度淬火后也難以鉆不銹鋼吧,我以前用普碳鉆頭鉆1.5厚的304板,基本鉆幾個(gè)孔就得磨鉆頭,有的同事一個(gè)孔都鉆不了,哈哈
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點(diǎn)評(píng)
如果你要買打孔的角鋼都是特別提醒采購(gòu)員:拜托!一點(diǎn)要買正品呀!傷不起?
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