Design Features

Custom silicon nitride locating pins, also known as ceramic locating pins for spot welding machines, are key components designed for 

high-performance spot welding machines and have the following significant design features:

Structural Design

The locating pin features a cylindrical body and a spherical head. This unique shape helps to precisely position and support the welding 

material in a spot welding machine. The spherical head provides a better contact point, ensuring the stability of the welding material 

during processing.

Surface and Color

The dark color of the locating pin is typical of silicon nitride, produced through a high-temperature sintering process that enhances its 

physical properties. Furthermore, the surface treatment gives the locating pin excellent wear resistance in high-temperature environments.

Internal Thread Design

The internal thread allows the locating pin to be easily installed into spot welding machines or other suitable mechanical devices, providing 

convenient replacement and maintenance.

Material Properties

Silicon nitride possesses extremely high mechanical strength (elastic modulus of 290 GPa) and excellent high-temperature resistance 

(maximum operating temperature up to 1200℃), making it suitable for demanding industrial environments. Its Vickers hardness reaches 

1500 HV, and its compressive strength is 2500 MPa, ensuring stability and durability under high loads and temperatures.

Application areas

Silicon nitride locating pins have a wide range of applications in various industries, especially in situations requiring high precision and 

durability:

Applications in Spot Welding Machines

In spot welding machines, these locating pins are used to precisely position metal materials, ensuring the accuracy and repeatability of the 

welding process. Their high-temperature resistance and wear resistance make them ideal for continuous, high-intensity work.

High-Temperature Processing Environments

Due to the high thermal stability and mechanical strength of silicon nitride, locating pins are also suitable for other high-temperature 

processing environments, such as heat treatment and furnace operations.

Chemical Processing

The chemical stability of silicon nitride allows locating pins to be used in chemical processing equipment, especially when handling highly 

corrosive chemicals.

Silicon nitride locating pins offer reliable performance in high-temperature, high-stress industrial applications thanks to their superior design 

and excellent material properties. Their carefully designed structure, high-temperature resistance, and mechanical stability ensure long-term 

durability and high efficiency in extreme working environments. These characteristics make silicon nitride locating pins the preferred 

component in high-performance spot welding and other precision manufacturing fields, demonstrating the high adaptability and value 

of modern materials science in practical applications.

In the field of precision ceramic machining and customization, our company is dedicated to producing various high-performance ceramic 

components, including zirconia ceramics, silicon nitride, and aluminum nitride. These ceramic components possess excellent thermal stability, 

electrical insulation, high-temperature stability, and wear resistance, and are widely used in critical fields such as aerospace, electronics, 

machinery, military, and automotive. Our products, with their superior performance and reliability, provide customers with crucial support 

and assurance, helping them improve production efficiency and optimize product performance.