The colours used are: blue (steel, with two rings for steel over 1,100 N/mm2 tensile strength); yellow (for stainless steels); red (cast iron); green (aluminium and short chipping brass); orange (heat resistant steel, titanium and Inconel); white (hardened steel and chilled iron); and purple (general purpose use). With this indication system, users can identify the material that the tap is designed to cut and the WNT style of tap (i.e. HR, NW, HT or UNI).
Colour coding simplifies WNT tap selection
WNT has adopted the VDI3323 standard of colour coding and applied it across its range of Mastertool Performance taps. The VDI coding system is already used by WNT across its catalogue to identify tools suitable for specific material groups. By adding either a single or double coloured ring to its taps, users now have visual confirmation that they are picking the correct tap for the job.
