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Thread tools \ Technical introduction – thread tapping

Screw tap colour ring system

the screw tap colour ring system allows the user to quickly and reliably identify the correct screw tap for the task. each colour ring represents an ideal chip geometry
for the material being processed. the colour system is based on the ISO code for indexable inserts and can therefore be understood worldwide. very universal tools
do not have a ring. the graphic below shows the various geometries and their purpose.
UNI MAX UNI UNI high-strength non-ferrous metals stainless steel cast and titanium and hard
up to 1000 N/ up to 1000 N/ above 1000 N/mm 2 short-chipping nickel alloy
mm 2 mm 2 non-ferrous
metals

each material has its specifi c characteristics and needs individual chip geometries. this means that the chip
angle, clearance angle and guide length must be set to achieve an optimal result. stainless steels and steels
need positive cutting to reliably penetrate the material and safely remove the chips. for processing very
hard materials, the cutter must be as stable as possible.

Clamping device recommendation for screw taps

Length compen- Synchronous Hydro-expansion Surface
sation chuck tapping chuck Collet chucks Shrink-fi t chucks chucks chuck

Length compensation range 9-15 mm 0.5-1 mm 0 0 0 0
Stable
Stable
Stable
Stable
Suitable for usage conditions Unstable Unstable-stable (synchronous) (synchronous) (synchronous) (synchronous)
(synchronous)
Suitable for conventional machines
Suitable for CNC machines
Suitable for conventional conv.
screw taps (low relief
grinding)
Suitable for standard CNC/conv.
screw taps (medium relief
grinding)
Suitable for synchronous CNC/Synchro
screw taps
(high relief grinding)
= very well suited = suitable = limited suitability
Source: Hahn+Kolb Werkzeuge GmbH
Technical data subject to change. www.iconridge.com
Availability subject to country specific rules and regulations. 159

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