Page 259 - THREADING CATALOG

½

Thread Milling

Today, thread milling is increasingly used to produce external
and internal threads. Some of the many advantages include: THREAD MILLING
• With thread mills, either right- or left-handed threads
can be produced using the same tooling.
• No need to change the tool for production of
different thread diameters - one tool is suitable
for various thread milling diameters.
• Thread length milling in one pass.
• Machine load low.
• Machining difficult to cut materials.
• Thread milling next to the bottom of blind hole.
• Bottom thread relief not required.
• Excellent and controlled thread surface finish.
• Indexability and repeatability when changing or replacing cutter.
• No problems with removing and replacing a broken tool: it is
possible to extract the broken tool without damaging the part.
• Easy and efficient machining for thread milling
in CNC milling machining centers.
• Threading in asymmetric parts.
• There is no limit to the size of the part
where threading is required.
ISCAR offers a wide range of cutter
diameters for all types of threads.
The principle of thread milling production
is based on the following:
The cutter is located parallel to the part axis along the required
thread. The cutter rotates around itself and enters into the
part radially or tangentially until reaching the required depth
depending on the thread type. Simultaneously, rotary motion of
the cutter around its axis moves spirally along the whole length
of the requested thread. The cutter movement along the thread
length while completing one round around the part is equal
to the pitch of requested thread. In this way, the threading
is done while completing 1-1.3 turns of the tool around the
workpiece; 0.3 turn is necessary for a full plunge of the cutter
to the thread depth (at start thread production) and overlap
the plunge location of cutting (at end thread production).

257