When selecting stem material, it must be ensured that it has sufficient strength, good impact toughness, scratch resistance and corrosion resistance at the specified temperature. It is a fragile part, and attention should be paid to the machinability and heat treatment properties of the material when selecting.

1. The thread of stainless steel stem is self-extruding and has high thread strength and precision.

two。 The concentricity of the thread part and the polishing rod part overcomes the problem of the rolling die which is easy to be distorted and damaged in the domestic rolling process for a long time.

3. The polishing precision of the bar reaches the mirror effect, the opening and closing is convenient, and the sealing performance is good.

4. The reversing position is formed by CNC technology at one time, with high precision and good sealing performance.

5. The T-shaped groove at the end adopts forging process with high efficiency and low cost.