Is there a good resource somewhere for the best type of CBN wheel to get?
I have never used one, have seen a couple but not in use and not for my application.
I make broadheads, blades are 1055 carbon steel, heat treated to 54HRC. they are 1.2mm thick and ground single bevel.
I currently use alum oxide wheels, but they are hard to get in my sizing, 305mm x 150mm x 127 bore, it's a vertical wheel style, type 6A2 wheels, straight cup.
I got a norton one locally last time, it lasted 2-3 weeks, and that wasn't grinding every day or heavy, as i am only taking a thou per pass, up to 36thou, using synthetic coolant. It was, supposedly, exactly the same as the previous one that lasted around 8 months, with far more use. The worn wheel has been sent back for them to test as to why.
I do between 35 and 56 blades at a time, depending on shape, all in jigs on a 3500mm mag bed.
Now i'm looking at changing to a CBN wheel. After a bit of research, and confusion, i think i need an electroplated CBN wheel, over a resin bonded one, in probably a 150 or 180 grit. Thoughts?
The electroplated CBN look more like a diamond wheel, from what i have been able to see, whereas the resin bonded are totally different, with a much smoother looking surface.
I'm hoping to be able to get as close to a razor sharp finish as possible, sparking out for the last 8-10 passes is what i do now, so i am guessing it will be the same with CBN.
Cheers
I have never used one, have seen a couple but not in use and not for my application.
I make broadheads, blades are 1055 carbon steel, heat treated to 54HRC. they are 1.2mm thick and ground single bevel.
I currently use alum oxide wheels, but they are hard to get in my sizing, 305mm x 150mm x 127 bore, it's a vertical wheel style, type 6A2 wheels, straight cup.
I got a norton one locally last time, it lasted 2-3 weeks, and that wasn't grinding every day or heavy, as i am only taking a thou per pass, up to 36thou, using synthetic coolant. It was, supposedly, exactly the same as the previous one that lasted around 8 months, with far more use. The worn wheel has been sent back for them to test as to why.
I do between 35 and 56 blades at a time, depending on shape, all in jigs on a 3500mm mag bed.
Now i'm looking at changing to a CBN wheel. After a bit of research, and confusion, i think i need an electroplated CBN wheel, over a resin bonded one, in probably a 150 or 180 grit. Thoughts?
The electroplated CBN look more like a diamond wheel, from what i have been able to see, whereas the resin bonded are totally different, with a much smoother looking surface.
I'm hoping to be able to get as close to a razor sharp finish as possible, sparking out for the last 8-10 passes is what i do now, so i am guessing it will be the same with CBN.
Cheers