Replacement blade for our No. 40-1/2 Scrub Plane. Comes ground with a 3" radius.
The Scrub Plane blade comes with a 3" radius. The exact radius is not important, and the curve of the blade does not have to be perfectly symmetrical to do a good job. It just has to be sharp.
After preparing the back of a new blade like any other plane blade, you are ready to tackle the bevel. One easy way is to hold the blade vertically in a vise and start with the coarsest stone necessary. Hold the stone flat against the bevel, and stroke the stone upward as you move it across the bevel.
To hone with finer grits, you may find it easier to work at the bench. Register the bevel firmly on the stone, and roll the blade from one side to the other as you move down the length of the stone. Go all the way up through the grits as you would on any blade, and roll the blade from one side to the other as you move down the length of the stone. When the edge is sharp, stone the back of the blade to remove the wire edge. The finished edge should be consistently sharp from one side of the blade to the other.
Made from A2 Tool Steel, cryogenically treated, hardened to Rockwell 60-62 and double tempered. Our heat treating technique ensures that the blade will take and hold a very fine edge for a long time. After heat treating, the blade is fully surface ground on the top, back, and cutting edge, giving a smooth, flat surface that will take a mirror finish very quickly.
Blades should be kept lightly oiled or waxed to prevent rust. We recommend Jojoba Oil, a plant based oil product that is non-toxic, odor-free and easy to use. Also, in our shop, we use a fine abrasive handblock to remove any light surface oxide from tool bodies and blades. Jojoba Oil and abrasive handblocks are available from us.