Originally Posted by
Christian Setla
Spear point, afaik, refers to a type of scraper used by someone, possibly Richard Raffen? I think there is one tool manufacturer who offers this scraper, but it is not a common tool and would not be included in a basic set of turning tools.
A typical set of turning tools would include a parting tool, which, if you turn it so you look at the wide flat side, will have a 60ish degree point. It is meant to be used vertically and for parting off something you have turned. There are several types of parting tools, some of quite thin steel so there is minimal waste when parting. The flat sided parting tools can start to bind if doing a fairly deep cut so some of these tools do not have flat sides but rather are thicker in the center where the tip is ground and they taper off to both sides which reduces the binding.
A standard parting tools is ground as you hold it for parting against a grinding wheel. There is really only one way to grind them and thus, there's not much out there for videos.
There are scrapers made for 90 degree corners, or to match dovetail jaws on a chuck.... Again, these would be more specialized tools and something you would purchase if you really have a need for one.
The point scraper is really just a round steel rod with three facets ground with a grinding wheel. As others have said, it's a dismal tool and the tool steel is often better used for something else.
Regards
Christian