Wow, that didn’t take long! Really nice work and I like the printed components. Very glad you are getting good results.This was worth doing, best finish I've gotten on ebonite ever. Takes a little experimentation to set lathe and feed speeds, but having an independent feed control is great! Also, can confirm that even a poorly made HSS cutter produces a better finish than a carbide insert.
I have a couple of bags of HSS tool blanks from Little Machine Shop, but this was the only cutter I've ground yet, and was specifically designed for cleaning up the small space behind the threading on kitless pen bodies; it has a cutting area that is about 1 mm in length oriented flat against the work piece. I'll have to grind a better tool with a full length cutting surface, but this tiny tool actually worked pretty well.
Great article Bill. To give folks a sense of hardness the article is referring. The rubber on the spindle of an oscillating sander is typically about 80 durometer.Here's a good series of articles on grinding your own HSS tools on a belt grinder. Note that it is Part 3; however it links back to parts 1 and 2. Worth a read IMHO.
This is the last article in Mikey's series about grinding lathe tool bits. In part 1 he discussed his experiences with grinding bits, why he uses a belt sanderwww.machinistblog.com
If you're interested in grinding a tool for Alumilite (and possibly other plastics as well) take a look here:
I made 2 tools, right hand and left hand. Sorry for the confusion. For some reason when turning toward the headstock, the finish isn’t as good. Of course the first tool I made was that one.Danny, I'm confused by the pictures of the shear tool. You state that the tool is ground to cut going left to right (headstock to tailstock) but the picture with the tool mounted on the lathe looks like it is oriented for cutting tailstock to headstock. What am I missing? (My spatial-geometric abilities seem to have gotten worse with age.... )
Thanks Mal, this was a one time thing, I don’t make many pens for sale. My cousin owns a quilt shop and wanted these for a class she teaches.OK .... I get it now !!! . Now I can see the reasons behind a lot of your activities !!!
Very well done, Danny !!!