Shenzhen Comray Industrial Co.,LTD

 PT tapping screw

The improved triangular PT tooth screw can provide maximum connection effect for various thermoplastic parts. After the improved design, the strength of the screw is better, and the best material flow is created when the screw is installed, so as to achieve higher effect and better preloading force, so as to improve the service life of the connection.

Main advantages

Provide the best effect for all thermoplastic plastics.

Provide higher tension and torsion strength;

Provide higher strength and installation reliability;

It can achieve higher limit moment and locking moment.

Characteristics and Benefits

1. The improved geometric tooth profile during assembly provides better material flow.

Provide higher dental grain joint surface;

It can achieve higher limit moment and locking moment.

Perfect material flow;

Shorter or smaller diameter screws are allowed if necessary.

2. Larger Screw Cross Section

Increase the shear area and screw strength;

Increase fatigue life;

Provide torsional and tensile strength.

3. Reasonable tooth spacing

Higher preload is allowed, but less contact pressure is required.

Radial pressure is minimized.

Triangular PT has longer fatigue life than ordinary PT screw because of its larger base diameter and rational thread design.

The self-tapping design of triangular PT screw provides better thread engagement and therefore better fracture resistance of threads. The above figure shows that Sanle PT screw has stronger anti-torsion ability than ordinary PT screw under cyclic load.

Recommendation of Base Design

The so-called optimal aperture is to obtain the maximum prestress in the installation process. The way to start determining the appropriate aperture is: = 0.8 x D1 (see figure). Some special occasions may require appropriate adjustments. For example, the material modulus is different, the forming conditions are different, the die design is different, the location from the injection port, the structural heterogeneity of the fusion line, or the quantity of recycled materials. We recommend testing the original sample to ensure the best results.