What is the difference bewteen c2,c3,c4,c5,c6 cutters bits.

The higher the number, the harder mtrl. it's designed to cut. C-2 is fine for cast-iron. C-5 & C-6 should be used on stainless and tool steel. I believe it has to do with grain structure and size of the carbide grain and it's ability to hold a keen edge. If all you're cutting is wood, it doesn't make any difference.
 
KJ Cues said:
The higher the number, the harder mtrl. it's designed to cut. C-2 is fine for cast-iron. C-5 & C-6 should be used on stainless and tool steel. I believe it has to do with grain structure and size of the carbide grain and it's ability to hold a keen edge. If all you're cutting is wood, it doesn't make any difference.
Click to expand...

That's a better answer than what I wrote in the other thread ... now I have to append a couple of :o :o

Dave
 
KJ Cues said:
The higher the number, the harder mtrl. it's designed to cut. C-2 is fine for cast-iron. C-5 & C-6 should be used on stainless and tool steel. I believe it has to do with grain structure and size of the carbide grain and it's ability to hold a keen edge. If all you're cutting is wood, it doesn't make any difference.
Click to expand...
thanks for the info KJ
this thread could have been part of the one i posted
if i got this right, the number indicates the hardness
the letter a, b, c and so on is the style/shape of the tool and
the other letter is left or right
correct???????????
 
BHQ said:
thanks for the info KJ
this thread could have been part of the one i posted
if i got this right, the number indicates the hardness
the letter a, b, c and so on is the style/shape of the tool and
the other letter is left or right
correct???????????
Click to expand...

By George, I think he's got it. Very glad I was able to help. Thanx, KJ
 
carbide

Carbide is graded from C2 (soft) to C7 (hard). At the bottom of the scale, C2, the carbide is used to machine short-chip type materials like cast-iron and some stainless. The softer grades of carbide generally have what they call a higher "transverse rupture strength". This means that it can take a pounding without chipping. Every time the work piece throws off a chip, it acts like a mini hammer blow to the carbide. The lower the C number, the tougher the carbide. The higher C5-C7 numbers are used on continuous (birdsnest) materials. Now the shapes of tool bits are C (square nose), AR (no lead angle right hand), AL (no lead angle left hand) BR (lead angle right hand) BL (lead angle left hand) D (80? point) E (60? point). Then, after the C,AR,AL,BR,BL,D, or E, there is a number 4,5,6,8 etc. that stands for the number of 1/16ths of an inch for the shank size. C4= square nose, 1/4" shank. So an E6 C5 is a 60?, 3/8 shank turning tool in the C5 grade. I hope this confuses you sufficiently. Wolf
 
wolfgun said:
Carbide is graded from C2 (soft) to C7 (hard). At the bottom of the scale, C2, the carbide is used to machine short-chip type materials like cast-iron and some stainless. The softer grades of carbide generally have what they call a higher "transverse rupture strength". This means that it can take a pounding without chipping. Every time the work piece throws off a chip, it acts like a mini hammer blow to the carbide. The lower the C number, the tougher the carbide. The higher C5-C7 numbers are used on continuous (birdsnest) materials. Now the shapes of tool bits are C (square nose), AR (no lead angle right hand), AL (no lead angle left hand) BR (lead angle right hand) BL (lead angle left hand) D (80? point) E (60? point). Then, after the C,AR,AL,BR,BL,D, or E, there is a number 4,5,6,8 etc. that stands for the number of 1/16ths of an inch for the shank size. C4= square nose, 1/4" shank. So an E6 C5 is a 60?, 3/8 shank turning tool in the C5 grade. I hope this confuses you sufficiently. Wolf
Click to expand...

Not confusing at all. Very informative Wolf.

Thanks, Ray
 
Last edited:
You must log in or register to reply here.
Back
Top