Why Spiral Tap Threads Keep Breaking Off

Processing Material Issue

One primary reason for the burr on spiral taps is the inappropriate processing material. If the material is too hard or too brittle, it's prone to chipping during cutting. Additionally, the surface roughness of the processing material can greatly affect the spiral tap.

Cutting Conditions

Overly high cutting speeds and depths, or inadequate cutting lubrication, can easily lead to the chipping of spiral taps. During the cutting process, maintain a moderate cutting speed, neither too fast nor too slow; control the cutting depth within an appropriate range, avoiding excessive or insufficient depths; ensure sufficient cutting lubrication to prevent excessive heat generation during cutting.

3. Tool Selection

Additionally, selecting an inappropriate thread cutting tap is one of the common reasons for broken threads. If the chosen tap is too soft or not sharp enough, it is prone to cause broken threads. Therefore, when selecting a thread cutting tap, it is crucial to choose the appropriate cutting tool based on the characteristics of the material being processed and the specific processing conditions.

How to Avoid the Problem of Spiral Thread Cutting Off the Corner

Make a reasonable choice of processing materials

Firstly, ensure that the processed materials meet the required quality standards, avoiding situations of excessive hardness, fragility, or excessive surface roughness. Additionally, during the processing, special cutting fluids or tool coatings can be used to enhance cutting performance.

2. Control Cutting Conditions

Next, it is essential to properly control the cutting speed, depth, and lubrication conditions, adjusting these factors based on the specific material being processed and the characteristics of the spiral tap.

3. Selecting the Right Cutting Tools

When selecting the appropriate spiral tap cutters, consider the material being machined and specific processing conditions. If encountering chipped insert taps, you may also consider replacing them with other types of taps.