- Exceptional temperature resistance up to 3000°F (1650°C)
- Outstanding corrosion resistance to acids, solvents, salts, and organics
- Excellent electrical & thermal insulator
- High purity
- Alumina ceramic set screw features and benefits
Alumina ceramic set screws are one of the most thermally resistant screws available. Due to their outstanding thermal resiustance, alumina ceramic screws are geared for the most demanding high temperature applications. Alumina ceramic set screws also have outstanding corrosion resistance and are highly chemically resistant to acids, solvents, and salts. Additionally, alumina ceramic screws find many uses in high voltage applications due to their non-conductive electrical properties.
Alumina ceramic set screws are available in both metric and standard sizes. Please contact us if you have any questions about the properties or availability of our ceramic screws.
Set screws made from customer specified ceramic grades or custom dimensions are available upon request.
Alumina set screws are unique in that they have no screw head, meaning that they have no protruding part past the threaded shaft. They are thread only and are available with a socket or slotted driver insert at one end. Set screws are used to secure an object within or against another object. Typically they secure a rotating part such as a gear or shaft. Alumina set screws are driven through a threaded hole in the rotating part until it is tight against the inner object, preventing from moving relative to the outer object. Set screws are available with various points depending on the application.
This is the most commonly used set screw and is identified by a cup-shaped indentation on one end. Alumina cup points are typically used for a quick, semi-permanent or permanent applications where it is acceptable to cut the cup point edge of the screw.
A cone point is easily identifiable by its sharp cone-shaped point – just like an ice cream cone. Alumina cone point set screws deliver the strongest clamping force due to the deep penetration of the point. As a result they are used for permanent assembly.
The cheapest and simplest of the set screw point styles, this screw has a flat surface on the bottom of the screw. This type is used when you need the ability to frequently change parts and require minimal shaft deformation.
Common Ceramic Grades
Alumina ceramic or Aluminum oxide (Al203) is the most common grade of alumina ceramics and is designated as being 99.8% pure. Alumina is most known for high temperature stability and has a usable temperature limit of 3000°F (1650°C). Alumin has the greatest balance of economy, mechanical and thermal properties.
Various other compositions of alumina ceramic are available upon request.