Range of application:
5% cobalt-alloyed jobber drills with an extremely sturdy construction (re-inforced web) for drilling under difficult conditions e. g. poor chipremoval and deep holes, for use in steel and cast-iron with tensile strength up to 1.300 N/mm².
Strengths
Self-centering
Special point shape
Harder
Nitro-oxidised chamfer
Deep hole twist drill
Big chip spaces (6 to 8 x D)
Faster by special drill geometry
Highly accurate centering
