DIN 1897
CLASSIC SERIES
HSS
Type N
3 X Ø
STANDARD STUB DRILLS
STRAIGHT SHANK DRILLS
Design and technical specifications
Helix angle
Standard (DIN1414 type N)
Point angle
118º
Point grinding
Relieved cone
Web thickness
Normal
Web taper
Normal
Flute form
Normal
Tolerance 
h8
Other specifications
Under DIN 1414
Finish
Tratamiento superficial Nitrurado (Brillante)
Details and applications
This drill offers the maximum stiffness when working with hand drilling machines in the drilling of thin sections, sheet metal and in general in machining with automatic and capstan lathes: SHORT HOLES DRILLING. Excellent production drill for a wide range of applications. In this sizes this is our most economic family. For a higher performance we suggest our Optimus families 185.43 and 185.44. Use to drill: Steel and cast steel, alloyed and non-alloyed, up to 900 N/mm²- Grey cast iron- Malleable cast iron-Pressure casting- German silver- Graphite- Phosphor bronze for bearings- Bronze alloys of aluminium, lead, magnesium or silicon-Soft brass (=60% Cu) continuous swarf- Electrolytic copper-Zinc alloys- Light alloys with thin broken swarf (alloys of silicon).