not done it yet
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What do you mean use it properly?
What bit of that did you not understand? I gave all the possibilities. I suppose it was too late if the end mill was good but you blunted it by improper use.
I don’t know your capabilities or the machine/tool combination in use, so several possible ways to blunt an end mill (speed, feed rate, cooling/lubrication, machine rigidity are typical reasons for short cutter life). I’m guessing it was not a carbide end mill or an insert type?
edited to add I didn’t read the rest of the thread before responding. BTW, that cutter looks, to me, like a facing cutter, not for plunge/hole cutting?
What bit of that did you not understand? I gave all the possibilities. I suppose it was too late if the end mill was good but you blunted it by improper use.
I don’t know your capabilities or the machine/tool combination in use, so several possible ways to blunt an end mill (speed, feed rate, cooling/lubrication, machine rigidity are typical reasons for short cutter life). I’m guessing it was not a carbide end mill or an insert type?
edited to add I didn’t read the rest of the thread before responding. BTW, that cutter looks, to me, like a facing cutter, not for plunge/hole cutting?
