Iron Profiled

I only had about an hour to spend in the shop this week, so I didn’t too much done.  That being said, the iron for my first moulding plane is profiled.  The process of profiling the iron starts with putting some machinist layout fluid on the front of the plane iron blank, inserting the blank into the plane body with the wedge in place, and scribing the profile of the plane’s sole onto the blank.

IMG_2868Next comes the grinder.  I used the grinder first to get a square edge as close to the layout line I had scribed as possible.  Then I ground a bevel on the back side of the iron.  Boy did I find out how inadequate  my hand cranked grinder is for this job; or a least the grinding wheel I have on the grinder is inadequate.  The photo above was taken after I redressed the wheel once the iron was roughly profiled.  While I was grinding, there was a U-shaped trough in the middle of the wheel that was around 3/16″ deep.This Norton 3x wheel is great for grinding plane irons and chisels, but for work like this, I really need a harder grinding wheel and I especially need a grinder with rests for holding the iron in the right position while I grind.  I’m looking into a couple of electric high-speed grinders that I can use for this work.  I’ll write a post if (when) I get one.

After the iron in roughly the right profile, I inserted it back into the plane body to check the profile.  I then reapplied the machinist layout fluid and re-scribed the profile.  Once this was done, I used a coarse diamond needle file to refine the profile so that I matches the profile of the plane.

IMG_2869

With this done, the iron is now profiled to match the plane and has a flat along the edge that is about 1/64″ wide.  This flat will be taken care of after the iron is heat-treated (hardened and then tempered).  I’m not really sure yet how I want to go about the heat treating process.  If any of you have any experience with heat-treatment and have any suggestions, please let me know.  I would like to make a full set of these planes, so a long-term solution would be preferred.

To close, here is  a photo of the profiled iron in the plane body.IMG_2871

Until next time. . .

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