Thread: Lathe tool video

This video is somewhat long winded but is interesting. The grinding wheel he is using is a rough looking grey wheel !

https://www.youtube.com/watch?v=2R0l6I1yrrk

One observation Ive made with grinding/sharpening HSS blanks or touching up old tools is: the metallurgy in the tools varies , they are not all the same. Seems that different brands have different elements .. cobalt or tungsten or whatever. Can be frustrating because you use a method with good results , try another piece of HSS with the same method and get a crap result

I watched this video last night. Interesting. Couple of things that he did not address were re-sharpening and using the tool on steel. (Remarks in the comments suggest that it is used for machining steel). I guess that an angled holder could be used to give top rake for steel. No chip breaker with a longish cut at 0.5mm doc could produce an unruly steel thread.
If I understand the geometry correctly, this is very similar to a tangential tool.

Thanks for posting the link,

Findlay.

Noticed he doesn't grind a radius on the tool nose which just about everybody in the lathe world recommends for a decent finish .

Because the tool is presented to the work at an angle, the cutting is being done along the flank of the tool. The only time that the point is cutting is in the root of a shoulder.


Findlay.

In many of the utube instructional lathe videos the instructor uses either free machining brass or aluminium as the example job, it all looks very easy it would be closer to the real world if they used black steel or something more challenging as the job piece

Originally Posted by morrisman

This video is somewhat long winded but is interesting. The grinding wheel he is using is a rough looking grey wheel !

https://www.youtube.com/watch?v=2R0l6I1yrrk

I only scanned the video to see the wheel. Industrial aluminium oxide wheels usually come in grey. The important component is the grit and bond the wheel has. If we were to take the wheel off and look at the code you would likely find it is the right wheel for HSS even though it looks just like a junky wheel on a cheap grinder.

Pete