Another Puukko ground from an old, old file -with handmade sheath

I started this project about a month ago, from an old file that I had picked up at a yard sale for a few pennies. The handle has black leather and brass bolsters, and solid Japanese Maple from a tree I had to take down in my yard. The metal has a light polish- not a mirror finish, I decided not to take it beyond about 220 grit since I wanted a working blade.

The rest of the recipe: 4.5" handle, 5.5" blade. The sheath is 8oz leather with a light canyon eco stain. After experimenting, I used a double cross stitch, measuring at various points along the handle and wood interior sheath, cutting the the leather to fit- a bit short of the actual circumference, then stitching while damp so that there was a consistent gap. The leather stretches when wet to accommodate the gap then shrinks to fit as it dries. I think this approach makes cleaner lines than some of the videos I see where others attempt to wet form and then poke holes in leather and stitch after it has dried. This is my 2nd handmade puukko, and I learned the hard way to keep the grind angle to about 11 degrees (22 combined). Any shallower and I seem to end up with a filet knife. The most expensive item: The bolsters are from a brass plumb bob that I purchased.I could spend $12 to order brass in the right dimensions, or just cut one up. I was able to get two knives out of one plumb bob. Tools: The only electric tools I used are an angle grinder for profile and tapering and a portable belt sander turned on its back for quick wood shaping. This steel must have a fair amount of carbon- it threw deep sparks, and it heat hardened quickly when I tried to thin the blade with the belt sander. I use a hand jig for filing- which is literally nothing more than a file taped to a length of rod and propped up at the right angle.

Tempering and annealing: I used a 'soup can' forge and Map gas to get to critical temper and quenched in a jar of canola oil, then wrapped in foil and annealed in the oven at 375 for 2 1 hour cycles. It seems to have a nice balance of toughness and hardness.

Posted Feb 22, 2016, 4:18 AM UTC · edited

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