On 11/09/2012 09:19 PM, Wes Dean wrote:
It's funny the
information that does not seem to be readily available online
for newbies like me... I have a LMM 8.5x16
So, I have some 3/8" indexable turning bars.
What angle do I want on the tips to the material? Do you use the
pointy tip directly pointing, or use it so that one side is
almost even with the material?
If you're cutting threads, 29.5 degrees.? Cutting other items...it
depends...
Also, anyone
used these tips?
I have a different size, TCMT 2151 C5.
I'm turning mostly cold rolled and stainless. Is there any more
desirable C# for the carbide tips?
Or should I be using HSS tips?
HSS is your workhorse tip.? Cheap, easy to sharpen, hard to damage,
works well with light cuts.
With the turning kit from LMM, I seem to have chipped the tips
and worn them out pretty quickly. Am I turning to slow or fast?
Or advancing to quickly on the material?
Carbide chips easily, especially cheap carbide.? If it gets any
impact (like an interrupted cut...cutting over a groove or
something), they'll break.
I found one message board where they were saying you always want
blueish ribbons (golden for SS) when you are turning?
I doubt you'll ever get a mini-lathe to get a chip that hot.? That's
for production cutting which is where carbide excels.? Pedal to the
metal on the motor power cutting fast and hard.
What does the tip radius matter?
Larger radius is harder to break and leaves a smoother finish.?
Finer tip if you need a sharp groove.? Again, "it depends".
--
Jerry Durand, Durand Interstellar, Inc.
tel: +1 408 356-3886, USA toll free: 1 866 356-3886
Skype: jerrydurand
