Its a K3 Keen Kutter plane. This plane is of a friend of mine, Ciro, known luthier and skilled user of hand tools. Ciro, knowing my passion for planes, asked me for transforming the K3 in a super smoother , by changing the original blade with a thicker one. In this choice he would be able of planing harder and figured woods. A good occasion for taking some pictures.
I can say the K plane is very well made with good finish work. Handles are rosewood and all mechanical parts work precisely. Knowing Ciros preferences, I did only a functional recovery, leaving the plane with its lived aspect. The job was easier thank to the very good conditions of this plane. The blade is a "Two Cherries" tapered blade, having a 4 mm of thickness at cutting edge, far more than an ordinary Stanley type blade.In order to permit to yoke of engaging correctly the chipbreaker hole, I had to elongate its tip by adding sealing material (arc welding) and reshaping.Sometimes it is necessary to enlarge the plane mouth and/or substitute the chipbreaker screw, but was not the case of this model.
The bed, like Stanley Bedrock planes, slopes toward the mouth; this allows to support the blade at cutting edge in all frog positions and permit the thicker blade insertion without have to file the plane mouth (this was necessary when I had to upgrade Bailey or Record planes).
A bevel (red point in the drawing) was filed on the mouth front inner edge. With a very close mouth (0,2-0,3 mm), this allows to create more room to shavings.
I prefer to hone a smoother plane blade straight with rounded corners.
In this case, following Ciros instructions, I added a 10° back bevel, for having a final cutting angle of 55° (45+10). The result was fine. The blade thickness and quality make the difference and I hope this first shavings can satisfy my customer.