What is the special tap for thread sheath? What is the special tap for thread sheath? The special tap for thread sheath is a non-standard tap. Generally, it can only be used to process the internal thread bottom hole when installing the thread sheath. The special bottom hole tap for thread sheath is used to process the special internal thread of the screw sleeve installation hole. The structural size is consistent with the national general tap standard. The working size is specially designed and processed according to the size requirements of the screw sleeve bottom hole.

The special tap for thread sheath is divided into straight groove tap and spiral groove tap. In these two types of tapping, the straight groove tapping has strong universality. Both the through-hole and blind hole screw holes can be tapped. However, when using this tapping, the process should be more complex, and the debris in the screw needs to be cleaned in time. The special spiral groove tap for thread sheath is generally used for tapping blind screw holes, or for tapping screw holes with high precision. In addition, the spiral groove tap has the function of automatic chip removal in the process of tapping.