A Simple Hollow Grinding Jig
Intro: A Simple Hollow Grinding Jig
This is a jig I threw together from things in my shop that makes it easy to create hollow-ground knife bevels. I would have made an instructable out of it, but I don't have any pictures of the process and it's pretty easy to see how the thing goes together any way. The metal widget with the springs is there just to make sure the work rest (the piece of cherry with the c-clamp on top) doesn't move around and change the distance of the knife to the wheel. The c-clamp itself is cut down so I have a better view and control of the knife while grinding. I can also move it around to accommodate blades of different widths and thicknesses.
This jig could also work for with a bench grinder with a hard wheel. The roller that makes my hollow edge only has a 4-inch diameter, which is a little small for single edges...but it's the best I've got right now. And the blades end up devilishly sharp.
The last few images are of a knife I recently made with this jig, what I'm calling a "camp seax." Straight edges are easier. If you've seen my knifemaking Instructable, you can tell that I've greatly improved in a couple years.
This jig could also work for with a bench grinder with a hard wheel. The roller that makes my hollow edge only has a 4-inch diameter, which is a little small for single edges...but it's the best I've got right now. And the blades end up devilishly sharp.
The last few images are of a knife I recently made with this jig, what I'm calling a "camp seax." Straight edges are easier. If you've seen my knifemaking Instructable, you can tell that I've greatly improved in a couple years.
15 Comments
bruce5000 10 years ago
check your messages like idea thanks
bruce5000 10 years ago
look down some show how to use a grinder
pfred2
jetboy 10 years ago
Basta 10 years ago
ripit 12 years ago
Basta 12 years ago
reedje777 12 years ago
fishcake27 13 years ago
Basta 13 years ago
fishcake27 13 years ago
pfred2 13 years ago
Basta 13 years ago
pfred2 13 years ago
http://img37.imageshack.us/img37/1992/pict0241.jpg
For hollow grinding chisel and plane blades mostly.
I made this other one first though sort of a proof of concept before I committed to doing it in steel:
pfred2 13 years ago
I just found another picture of that tool rest more recent:
https://www.instructables.com/files/orig/F39/HOKU/GKGL5JHO/F39HOKUGKGL5JHO.jpg
I didn't know I could get the original resolution on this website of uploaded images.
caarntedd 13 years ago