- Joined
- Nov 10, 2013
- Messages
- 837
I gotta be honest, I couldn't figure out a better place to post this project. I've been making all the tools I need to try to learn how to engrave metal. I have everything done to the point that I may actually be able to put some deep scratches in steel soon. The last item I finished is referred to as a "power hone" but is actually more like a 6" record player with a diamond blade on top. The basic idea is that you use fixtures to hold carbide blanks at the proper angles to create graver bits. After using it, I started seeing where it could be useful for carbide lathe tools too.
In a nutshell, I used a sewing machine motor I got off Ebay a long time ago for about $12. I looked at the motor speed and the size of the motor pulley and calculated the diameter of my platen pulley to give me a max RPM of 1000. I have bearings above and below the platen pulley for the shaft to ride in. all the materials were made from metal laying round the shop. The 3 diamond discs also come from Ebay. I got a 240 grit, 600, and 3000 for about $12 shipped from China.
The speed control is a $19 Harbor freight router speed control that I disassembled and remounted in the end plate of the unit. The steel box is just 20 gauge sheet metal.
THe last photo is just a prop to show how the fixtures hold the carbide at the necessary angle. The fixture lets you grind 3 sides of the tip without removing the carbide tool.
In a nutshell, I used a sewing machine motor I got off Ebay a long time ago for about $12. I looked at the motor speed and the size of the motor pulley and calculated the diameter of my platen pulley to give me a max RPM of 1000. I have bearings above and below the platen pulley for the shaft to ride in. all the materials were made from metal laying round the shop. The 3 diamond discs also come from Ebay. I got a 240 grit, 600, and 3000 for about $12 shipped from China.
The speed control is a $19 Harbor freight router speed control that I disassembled and remounted in the end plate of the unit. The steel box is just 20 gauge sheet metal.
THe last photo is just a prop to show how the fixtures hold the carbide at the necessary angle. The fixture lets you grind 3 sides of the tip without removing the carbide tool.
