I want to follow-up on my comments from last night. I have some measurements.
First, lowering the slide bar down to the stone I get a perfect fit; if anything, the stone might be a smig concave in the middle. All blades had sides that are parallel with the opposite side. The Record and block plane blades we brand new.
Over the last two days I sharpened 4 different blade types (but a total of 5 blades); all were set for 25º. Here is some facts about the 4 different blade types:
width thickness
Veritas (for bevel up use; 2) 2 3/16th 0.182
Record (for #4) 2 0.0885
Stanley block plane 1 3/8th 0.0785
Stanley 90 1 0.121
None of these blades came out totally square but I would judge the Veritas blades to be nearly perfect. But as you can see, as the blade width and thickness decreases I observe a greater out of square result. I am not sure what the take away is. I am not able to give a measurement of how much out of square it blade is but results were very noticeable when held up to a light and that the 90 may have been as much as double the error of the block plane iron.
The Stanley 90, while a bit thicker than the next 2 thicknesses, had the worst results. It has the smallest width.
All blades were systematically moved across the stone.
The blade jig was checked and its fence to the front edge is square.
I guess my conclusion is that the thinner the blade, the less width it had there will be a tendency to have an edge that is not square. But I admit I may be drawing the wrong conclusion. Anyone care to comment?
Tim
First, lowering the slide bar down to the stone I get a perfect fit; if anything, the stone might be a smig concave in the middle. All blades had sides that are parallel with the opposite side. The Record and block plane blades we brand new.
Over the last two days I sharpened 4 different blade types (but a total of 5 blades); all were set for 25º. Here is some facts about the 4 different blade types:
width thickness
Veritas (for bevel up use; 2) 2 3/16th 0.182
Record (for #4) 2 0.0885
Stanley block plane 1 3/8th 0.0785
Stanley 90 1 0.121
None of these blades came out totally square but I would judge the Veritas blades to be nearly perfect. But as you can see, as the blade width and thickness decreases I observe a greater out of square result. I am not sure what the take away is. I am not able to give a measurement of how much out of square it blade is but results were very noticeable when held up to a light and that the 90 may have been as much as double the error of the block plane iron.
The Stanley 90, while a bit thicker than the next 2 thicknesses, had the worst results. It has the smallest width.
All blades were systematically moved across the stone.
The blade jig was checked and its fence to the front edge is square.
I guess my conclusion is that the thinner the blade, the less width it had there will be a tendency to have an edge that is not square. But I admit I may be drawing the wrong conclusion. Anyone care to comment?
Tim