Description
All countersinks have 3 cutting edges, radially relieved.
Flutes are ground from solid.
Three drive flats on the shank for use in a 3-jaw chuck.
Exact machining results in manual and machine use.
Chatter-free running through extremely unequal spacing of the cutting edges for high-quality surfaces.
Optimum tool life thanks to TiAlN high-performance coating.
High process reliability due to optimised chip evacuation.
Attractive cost/benefit ratio.

Product Data
Product type: High-precision countersink with unequal spacing and 3 drive flats
Countersink angle: 90deg
Tool material: HSS
Coating: TiAlN
Number of cutting edges: 3
External Dia. Dc: 8 mm
Smallest countersink Dia. for holes from: 2 mm
L: 50 mm
Dia. Ds: 6 mm
For countersunk screws ISO 2009, 2010, 7046, 7047: M4
For countersunk screws DIN 7991: -
Feed (f), Steel <500 N: 0.09 mm/rev

Cutting Data
Alu plastics: 75
Alu: 70
Alu cast >10% Si: 50
Steel <500 N: 40
Steel <750 N: 20
Steel <900 N: 15
Steel <1100 N: 8
INOX <900 N: 18
INOX >900 N: 15
Ti >850 N: 12
GG(G): 20
CuZn: 20

Application
High-precision countersink for chatter-free 90deg countersinking.