1. Worked material

ISO P & #8211; steel 

ISO N & #8211; non-ferrous metals 

ISO S & #8211; heat resistant super alloys

recommended

ISO K & #8211; cast iron

ISO H & #8211; hardened steel

ISO M & #8211; stainless steels 

admissible

2. Material of the cutting part

high speed powder steel with cobalt content

high speed steel with cobalt content

standard high speed steel

high speed steel with cobalt content

solid carbide tools

high speed steel ground

3. ISO standard

HA straight cylindrical shank

HA straight cylindrical shank

twist drill with cylindrical shank

twist drill with Morse taper & #8217; a

tool made according to DIN 374

tool made according to DIN 376

tool made according to DIN 333

tool made according to DIN 374

tool made according to DIN 376

tool made according to DIN 333

4. Coatings

TiALN + Tin

TiALN + WC / C

aluminum titanium nitride

titanium nitride

oxidised coating

TiN + TiCN

AlTiN

covered

uncoated

5. Additional markings

twist drill

cylindrical handle

Morse taper & #8217; a

blade angle

range of helix angle

helix angle

internal cooling

working part length

countersinking angle

number of cutting blades

number of cutting blades

type N & #8211; cutting materials with normal strength and hardness