07-02-2023, 12:40 PM
I'm now ready to grind the knives and set up the moulding head. Because this set of knives will only be used to run a very few feet, I am going to cheat just a little bit. There are two knives in the head, one will be ground to perfectly match the original trim, the other will be ground a slight bit loose. This makes the whole process so very much simpler. One knife will do the cutting, the other will act as a counter balance. By using a slightly slower feed rate, the cut will still be excellent.
I used the pattern to draw the profile on the knife blank. Using an angle grinder, mounted on a board, I slowly and carefully grind the knives. After grinding, I use a tapered stone to hone the cutting edge.
Checking to make sure knife matches the original trim.
Knives are weighed on a gram scale and material removed as necessary to achieve balance.
I used the pattern to draw the profile on the knife blank. Using an angle grinder, mounted on a board, I slowly and carefully grind the knives. After grinding, I use a tapered stone to hone the cutting edge.
Checking to make sure knife matches the original trim.
Knives are weighed on a gram scale and material removed as necessary to achieve balance.
M R Radios C M Tubes
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
