> Message: 10 > Date: Tue, 20 May 2008 12:37:40 +0200 > From: "Svenne Larsson" <[EMAIL PROTECTED]> > Subject: Re: [Emc-users] Thread Milling > To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="iso-8859-1" > > Trying to wrap my mind around this tool. One of the bullet points says that >> only one tool needed for right or left hand threads. Howdeydodat? >> >> Mark >> >> <https://lists.sourceforge.net/lists/listinfo/emc-users> >> >> > > The rotation direction of the threading pattern. Same tool goes either left > or right turns. > > Sven Gentlemen, A thread mill cutter doesn't have a helical pitch. The pitch is the distance between cutter points the same as if you loaded a gang of cutters on a mill arbor. The helical mill cycle moves the axis of the cutter one pitch for every full circle of interpolation. You can sharpen a woodruff style cutter with a thread shape and then cut any pitch you want with the helical cycle of the mill. In the same vein as Jon E. I used a lathe ID threading bar to cut a deep nonstandard thread on some parts. The feed was slow because not only was there one row of cutting points - there was only one cutting point. This was about 2 inch diameter ID thread, 6 inches deep, 24 pitch. I had six parts to do. No time nor budget to have a tap made. Worked great. You can cut ID or OD threads with a thread mill and a helical cycle. thanks Stuart
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