Homemade duplicator

[eastendlu]

Originally Posted by Mugz

Gotcha......I see what you mean now. I will look for one. Know the technical name?

Indexable carbide insert with a chipbreaker.

[Mugz]

Like this? I couldn't find a triangle shaped bit that was cupped. I can find some triangle cutters that have 11 or 15 degree clearance though but not cupped.

[Charleston]

Originally Posted by Mugz

Like this? I couldn't find a triangle shaped bit that was cupped. I can find some triangle cutters that have 11 or 15 degree clearance though but not cupped.

These inserts are for Milling operations. Look for Turning operations
They are exactly what you need.......or simply ask eastendlu He knows all about that stuff!

[Mugz]

I have these........with a chip breaker. Not sure if they are negative or positive chipbreakers......

[Charleston]

Originally Posted by Mugz

I have these........with a chip breaker. Not sure if they are negative or positive chipbreakers......

That looks promising. Try to find one with a sharper angle so you can turn closer to the end of the blank. Looking good