Sharpening- Parting Tool  

One of the best short videos I’ve seen.

I'm not a particularly good wood turner, but I am a knife maker and sharpener, so it should carry over pretty well. Hollow grinds allow the tool to be 'sharper' (more accurately, thinner, which is part of sharpness, but not the whole story), it should allow you to get a better angle on the workpiece for thinner stock (because you have clearane), the only problem you have to watch out for is toughness, if the edge is too thin out there it will dull quickly because it doesn't have enough supporting material, but HSS should do alright in that regard. In terms of edge retention, it should hold an edge better, but it's not so cut and dry. The hollow grind makes the edge thinner, and because it's a zero grind (no microbevels) it will act like a more acute angle, meaning it will retain an edge longer. However, like I said earlier about supporting material, if there isn't enough, the edge will just roll or chip. The flatter grind is more obtuse, more supporting material, tougher, stronger, but won't retain an edge quite as well. Honestly, the only way you'll know what's best for your tool is if you try it. It's not hard to change back and forth between grinds, and unless you do A LOT of wood turning, you are likely going to have the chisels last a long time, so a quick modification back and forth is not going to significantly alter their tool life. Stay safe, happy turning.

Good question. We shot that video 9 years ago 🙂. I now use CBN wheels that I buy from Woodturning Wonders.

@@woodturningwithtimyoder ok👍🏾