Choosing the right high-performance tap does not guarantee that the thread will be successfully machined.

The same high-efficiency tap may produce completely different machining results under different working conditions.

How to effectively use a internal threading tool -screw thread taps?

Therefore, the third knowledge point is :

based on the thread working conditions and tap usage.

3.1 Threaded workpiece working conditions

The thread machining conditions should at least be confirmed as follows:

• Through hole (thread through-hole) / Blind hole (thread non-through-hole)

• Drill Size

• Drill Depth

• Thread Depth

• Thread Specifications

• Thread precision class

• Thread Pitch

• Workpiece material

• Material hardness

• Rigidity of processing equipment

• Equipment pitch rigidity and stability

• Tool clamping rigidity

• Spindle and tool concentricity

• The center of the hole is concentric with the cutting tool

• Cooling methods (internal cooling, external cooling, air cooling)

• Cutting fluid (water-soluble, oil-based)

• Processing rhythm (attack to the end and then withdraw; pecking attack is strictly prohibited)

• Batch requirements

• Tool life requirements

hole type × hole depth × thread depth × chip removal requirements.

3.2 Through threads and blind hole threads

Through thread

Key focus :

•  Chip removal

•  Threaded outlet

•  End face burrs

•  Threading tool turning back

• Thread integrity 

• Excessive thread cutting amount

Blind hole thread (not through)

Key focus :

• Chip removal

•  Threaded outlet

•  End face burrs

•  Threading tool turning back

•  Thread integrity

Then, additional considerations are needed :

•  Chip accumulation

•  Effective thread depth

•  Invalid thread distance

•  Bottom space

• Spiral chip removal

•  Cooling, lubrication

•  Tool safety space

Therefore, blind hole threading often relies more on tool structure and chip removal design than through hole threading.

3.3 Threading tool operating conditions

The usage of threading tools includes :

•  Rigid tapping procedure

•  Correct selection of thread cutting tools

•  Correct clamping

•  Tool concentricity confirmation

•  Tool extension control

•  Correct machining direction

•  Correct cutting conditions

• Cooling method matching

• Appropriate tool retraction method

• Tool wear monitoring

• Lifespan Management

selection, structure, use, and problem diagnosis of taps.

As for issues related to the machine tool body, fixtures, cooling equipment, or other processing systems, these should be confirmed by the corresponding professional suppliers.

3.4 The third knowledge graph association

Therefore:

Thread specifications & precision + workpiece material + thread hole type

→ Determine the tap structure + tap material
→The way taps are used and the machining conditions affect the thread manufacturing result.

form :

Thread Material→ Thread working conditions Application → Thread Tool-Tap → Thread Process → Thread Result