Thread milling capability Which milling machine arrangement is specifically suited for producing internal or external threads of various pitches without changing lead screws?

Introduction / Context:
Threads can be produced by turning, tapping, die-threading, or milling. Thread milling allows flexible production of internal and external threads, including non-standard pitches, using helical tool paths and appropriate kinematics.

Given Data / Assumptions:

• Availability of a milling setup capable of synchronized circular and axial motions.
• Use of a thread milling cutter or a helical path generator (planetary motion).

Concept / Approach:
A planetary milling machine (or thread milling attachment) imparts a compound motion that generates helical threads. It decouples pitch generation from the machine lead screw, enabling a wide range of pitches by changing gearing or CNC parameters, not the physical screw.

Step-by-Step Solution:
Identify requirement: produce internal/external threads of different pitches.Match method: thread (planetary) milling achieves helixes by coordinated motions.Conclude: planetary milling is the correct choice.

Verification / Alternative check:
Modern CNCs perform thread milling with circular interpolation; the classical planetary attachment achieves similar kinematics mechanically.

Why Other Options Are Wrong:

• Pantograph and profiling machines copy contours; they do not generate helical threads.
• Piano-miller is for planing large flat surfaces.
• Planer with single-point tool (E) generates linear cuts, not helixes without complex gearing.

Common Pitfalls:
Confusing hobbing (gear generation) with thread milling; assuming only taps/dies can produce internal threads in milling contexts.

Final Answer:
planetary milling machine (thread milling)