Countersink Bit Series Material Chart
Cu,Ni, Ms,Zn
Plastics PVC
A
B
C
MATERIAL
Non- Ferrous Metal*
Alloy Steel
Stainless Steel
Description
Made of
Type
Shank
Wood Plastic
Cast Iron
7 cutting edge
AA AA AA AA
–
–
1/4” Hex
3 cutting edge
1/4” Hex (C-form)
AA AA AA AA AA
–
5 cutting edge
Straight shank
AA AA AA AA AA
–
3 cutting edge
Straight shank
AA AA AA AA AA
–
Slanting hole
Straight shank
–
AA AA AA AA
A
AA : Recommended A : Acceptable
A MADE OF
High speed steel (Cobalt content 5%) For higher heat and abrasion resistance. Suitable for drilling tough metal.
High speed steel
Alloy steel
B SURFACE
Shallow sinking Suitable for flat countersinking especially in thin metal sheets.
Shallow sinking Suitable for flat countersinking.
Deep sinking Suitable for deep countersinking.
C SHANK
1/4” Hex (C-Form)
1/4” Hex
Straight
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