- Joined
- Jun 22, 2006
- Messages
- 814
Recently, I came into a large quantity of used Nicholson mill files (double-cut bastards and single-cut smooths). After some testing with different heat-treat methods and grinds, I've knocked out the first one for sale, hopefully the first of many.
Leatherwork and sharpening for this one are still in the works, but I figured I would let everyone have a sneak peek and see what everyone thinks. I would also be very interested to hear what type of sheath you would prefer for this blade.
Heat-treatment & grinding process:
-file annealed in my evenheat kiln (held at 1475F for 2 hours and allowed to slow cool for 12 hours)
-profiled and rough ground to 60 grit (bevels hollow ground on an 8" wheel)
-brought up to temp in the forge (just slightly above curie point),edge-quenched in oil (fenso 150 - similar to a parks 50, except made by esso)
-tempered in two, one hour cycles at 400F (in the evenheat)
With this procedure, I was able to get the results I was looking for, a flexible and tough blade which, combined with a deep hollow grind, will make a very versatile cutter suitable for everything from dressing game to general camp chores. I tried a few different quenching mediums, using the kiln instead of the forge, and even grinding a blade from a full-hard file (and another with a spine draw after snapping the first blade like a twig) and finally settled on this method 5-6 files and a few hours later.
Specs:
-10.25" overall with a 5.5" blade
-approx. 3/16" thick at spine
-deep hollow ground, clip point blade, unsharpened swedge
-handled in black canvas micarta secured with 1 stainless corby fastener and 3/8" stainless tube for a thong loop
-satin finished bevels (fine grit scotchbrite finish)
Thanks for looking, let me know what you think,
Nathan
Leatherwork and sharpening for this one are still in the works, but I figured I would let everyone have a sneak peek and see what everyone thinks. I would also be very interested to hear what type of sheath you would prefer for this blade.
Heat-treatment & grinding process:
-file annealed in my evenheat kiln (held at 1475F for 2 hours and allowed to slow cool for 12 hours)
-profiled and rough ground to 60 grit (bevels hollow ground on an 8" wheel)
-brought up to temp in the forge (just slightly above curie point),edge-quenched in oil (fenso 150 - similar to a parks 50, except made by esso)
-tempered in two, one hour cycles at 400F (in the evenheat)
With this procedure, I was able to get the results I was looking for, a flexible and tough blade which, combined with a deep hollow grind, will make a very versatile cutter suitable for everything from dressing game to general camp chores. I tried a few different quenching mediums, using the kiln instead of the forge, and even grinding a blade from a full-hard file (and another with a spine draw after snapping the first blade like a twig) and finally settled on this method 5-6 files and a few hours later.
Specs:
-10.25" overall with a 5.5" blade
-approx. 3/16" thick at spine
-deep hollow ground, clip point blade, unsharpened swedge
-handled in black canvas micarta secured with 1 stainless corby fastener and 3/8" stainless tube for a thong loop
-satin finished bevels (fine grit scotchbrite finish)
Thanks for looking, let me know what you think,
Nathan