03-29-2015, 04:12 PM
I've done a fair amount of work on manual horizontal boring mills myself, and plenty of power tapping. That one you posted in the thread with the straight tap kind of surprised me because it appears to be a 4-flute hand tap. Fortunately the material is a short-chipping one, so it didn't pack chips and the material also seems soft.
In both videos I notice the large facing head rotating with the quill. On the machines I ran (Wotan and a Kearney & Trecker), I could (and did) disengage that head for 90% of the work I did. Too much mass rotating around unnecessarily.
Stay tuned, I'm editing and uploading photos and a video I took today. I went back to the shop for an hour (or less) and milled off 1/2 that block I tapped to see what it really looked like.
In both videos I notice the large facing head rotating with the quill. On the machines I ran (Wotan and a Kearney & Trecker), I could (and did) disengage that head for 90% of the work I did. Too much mass rotating around unnecessarily.
Stay tuned, I'm editing and uploading photos and a video I took today. I went back to the shop for an hour (or less) and milled off 1/2 that block I tapped to see what it really looked like.