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Thread tools \ Technical introduction – thread milling
Female thread creation: Milling cutter
The development of computer-controlled machines has made the thread milling procedure another
option for creating female threads. The thread is produced by the helical diagonal immersion of a
rotating tool. In the process, the axial movement of the tool in one revolution produces the pitch. For
this procedure, a CNC machine with at least three axes is required (XYZ).
Advantages, tool cost minimisation: Disadvantages:
right-hand and left-hand thread can be manufactured machine requirements (XYZ axes)
with a tool machining times generally longer in
thread milling cutters cover different threads with the series production
same pitch limited experience of the user in
for partial thread profiles, a wide range of threads can be thread milling
produced with a cutting insert
Advantages, process reliability:
Extremely high process reliability with very expensive
components
Reliable process solution for problem materials with
poor chip breaking and difficult chip formation
First choice with thin-walled workpieces or unstable
clamping operations
High thread quality
Thread can be made right to the base of a blind hole
Radius compensation programming enables thread P
tolerance to be adjusted easily
Internal cooling during thread milling
Internal cooling is of particular importance when it comes to thread milling. The short chips must be rinsed
out of the working area by the coolant medium. Otherwise, the chips produced could damage the surface of
the thread or even cause cavities on the tool.
We make a fundamental distinction between thread milling cutters with axial coolant flow, used for blind Thread milling cutters with axial coolant flow
holes, and modified variants with radial coolant flow, which are ideal for through holes.
Thread milling cutters with radial coolant flow
Clamping device recommendation for thread milling
Collet chucks Shrink-fit chucks Hydro-expansion Surface chuck Power chucks
chucks
Suitable for pitches up to 1.5 mm
Suitable for pitches above 1.5 mm
Vibration-damping
Surface quality
= very well suited = suitable = limited suitability
Source: Hahn+Kolb Werkzeuge GmbH
Technical data subject to change. www.iconridge.com 241
Availability subject to country specific rules and regulations.
