jamscal
Stainless
- Joined
- Sep 8, 2004
- Location
- Louisville, KY
I bought a Siegmund 4x8 welding table. It's awesome.
I also have a cast iron machine table...approx 4x10 that is flat and has 2 square sides. It's an inch thick at the thinnest and also webbed to about 3 inches.
Anyway I bought a 28 mm rotobroach to start drilling holes in the cast iron table to match so we can use the clamps on both.
Using a single speed mag drill.(seems too fast)
We got 6 holes and my employee says the top layer of cast iron is noticably harder to break through than what's beneath. It dulled out and won't cut anymore.
Local sharpening place wants $25 to resharpen. Bit costs $60. (by the time I make 2 trips it seems the $25 will match the $60).
I would probably want in the neighborhood of 40 holes in this.
What are my options, either bit wise or process wise?
We discussed drilling a pilot hole for the pointer on the rotobroach and die grinding through what we perceive as the hard layer.
We are using coolant.
I also have a cast iron machine table...approx 4x10 that is flat and has 2 square sides. It's an inch thick at the thinnest and also webbed to about 3 inches.
Anyway I bought a 28 mm rotobroach to start drilling holes in the cast iron table to match so we can use the clamps on both.
Using a single speed mag drill.(seems too fast)
We got 6 holes and my employee says the top layer of cast iron is noticably harder to break through than what's beneath. It dulled out and won't cut anymore.
Local sharpening place wants $25 to resharpen. Bit costs $60. (by the time I make 2 trips it seems the $25 will match the $60).
I would probably want in the neighborhood of 40 holes in this.
What are my options, either bit wise or process wise?
We discussed drilling a pilot hole for the pointer on the rotobroach and die grinding through what we perceive as the hard layer.
We are using coolant.
