SiC Shaft Sleeve

Semicorex SiC Shaft Sleeve for rotating Shafts is constructed from high purity Silicon Carbide ceramic. The Ceramics are manufactured as a precision tube shaped component which is engineered to resist wearing when subjected to high speed rotation and provide a thermal barrier against thermal shocks in the extreme applications of industry.

Shaft sleeves play a vital role as a protective barrier between the rotating shaft of the pump and all the other components of the pump and compressor. Silicon carbide is now defines as a premium material choice for the production of shaft sleeves due to its unmatched combination of extremely hard and thermally stable with exceptional chemical resistance.

Silicon carbide is well known for its very high level of mechanical properties such as hardness, close to diamond hardness, and extremely good resistance to wear, abrasion and surface damage. When used in high RPM applications with heavy load or with contamination (abrasive) particles, the Silicon Carbide shaft will maintain its smooth surface finish and as-built dimensions for extended periods of continuous operation. The durable nature of Silicon Carbide eliminates or reduces the friction between the shaft and the components adjacent to it, thereby either eliminating or reducing the amount of energy lost during operation and preventing premature damage to the shaft. As a result, Silicon Carbide allows the pump assembly to be used for extended periods of time.The high modulus of elasticity of silicon carbide also ensures excellent dimensional stability, preventing deformation under pressure and maintaining consistent alignment during operation.

Silicon carbide (SiC) shaft sleeves have superior thermal performance. SiC maintains its structural integrity at temperatures that surpass the high-temperature capabilities of metals and polymers, such as those used in high-temperature processes like hot-oil pumps or thermal processing equipment and chemical reactors. Additionally, the low coefficient of thermal expansion of SiC allows the sleeve to easily endure rapid temperature changes without cracking or warping, thereby providing for optimum performance under repeated heating and cooling cycles. Lastly, SiC has excellent thermal conductivity and will effectively dissipate friction-generated heat away from the shaft surface, thus lessening the likelihood of localized overheating or thermal failure.

In addition to its thermal performance characteristics, the chemical resistance of SiC only enhances the advantageous properties of SiC shaft sleeves when used in chemical process applications or severe environments. Specifically, SiC has been known to be chemically inert to most acids, bases, solvents, corrosive gases, and sea water, which would make it a great candidate for chemical processing, petrochemical, marine, and wastewater treatment industries. Additionally, SiC will not chemically react with process media or leach contaminants into the media and will therefore maintain the integrity of the equipment and purity of the products produced. Most importantly to the pharmaceutical, food processing, high-purity manufacturing, and any other industry where strict control of contamination is necessary, SiC's stability remains essential.

Precision manufacturing and advanced ceramic machining techniques ensure that each SiC shaft sleeve meets exact dimensional and surface-finish requirements. Despite its extreme hardness, silicon carbide can be ground and polished to achieve exceptionally smooth internal surfaces, reducing friction and wear on the mating shaft. The sleeves can be customized in terms of inner diameter, outer diameter, length, wall thickness, and tolerance to suit specific equipment designs. Whether used as a standalone protective sleeve or integrated into a complex sealing or bearing system, silicon carbide components provide consistent and reliable performance.

SiC shaft sleeves are widely used across industries including chemical engineering, oil and gas, power generation, water treatment, mining, marine systems, and general industrial machinery. Their ability to operate reliably under high load, high temperature, and corrosive conditions reduces maintenance frequency, minimizes downtime, and lowers overall operating costs. By replacing conventional metal sleeves with silicon carbide alternatives, equipment operators gain improved wear resistance, enhanced efficiency, and significantly extended service life.

In industrial applications where reliability, precision, and durability are essential, a SiC Shaft Sleeve represents a long-term solution capable of meeting the most demanding mechanical and environmental challenges.