Was not hard to find:
https://paulsellers.com/2017/02/pain...tise-clearout/
A sloppy mortise.
Isn't it a bit surprising Mr. Sellers has never heard of a swan neck, lock mortise chisel or the Japanese Sokozarai (?)
If one reads the comments he does address a question about this:
If one wants to save a little money, why not just bend and shape a piece of scrap metal to ladle out the chips?Not too useful for smaller holes but great for cutting deeper in door mortises. Also cost and size, they don’t do what the can levers do, but thanks for the suggestion.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)
Someone offered this explanation ("defense?")
"This is a demonstration mortise — he didn’t make any layout lines and the walls are unequal in thickness, also. Clearly it was created just for teaching. The right edge is bruised to show you what could happen."
If that really was the case, Paul really needed to add a disclaimer like "Do as I say, not as I do!"
But why? If you were demonstrating something as a teacher, why did a half-baked job, regardless of whether you were using a mortise chisel or a bench chisel as a mortise chisel?
I forgot which episode in which Roy Underhill made a similar mistake with smear of blood on his hand or work due to a chisel (plane?) cut (and he was not lecturing about hand tool safety!).
Simon
Simon; Roy was born in the USA. Paul Sellers was born in the U.K. There lies your difference in critique from this forum site.I forgot which episode in which Roy Underhill made a similar mistake with smear of blood on his hand or work due to a chisel (plane?) cut (and he was not lecturing about hand tool safety!).
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)
If not done for the initial grind or major repair, I think a lot of people do it because it's an easy way to avoid removing a bunch of steel. Steel that doesn't touch honing media because of the the hollow. People are lazy and want "quick".
I prefer a flat bevel or as flat as I can get free hand. If I get something horribly convexed over time I may go to the grinder to remove the "hump" and then finish on coarse stones to get my flat bevel back.
Hollow grind as a general sharpening technique bears no attraction for me. I only do it because I own a Tormek. If I knew then what I know now, I'd have bought the Sorby Pro-Edge for whipping things into shape. As it stands now I understand Tormek have a diamond wheel out that has diamond on the side you can use to get a flat grind. I may go that direction if I ever wear out my current wheel which at the rate of about 4 uses a year is going to take quite some time.
Quicker than stones if the grinder is set up and ready to go. Two dropped chisels this week...one student and one 'in a hurry' assistant...both chipped corners, but the CBN wheel made quick work of it. Don't see a reason to rush if it's a hobby, but pros have to worry about overhead in terms of both time and money. We have an SG wheel on one of the grinders, but seldom used.
Last edited by Todd Stock; 03-18-2018 at 8:11 PM.