Graphite grades are categorized according to particle size. The size determines which type of machining applications the graphite electrodes are suitable for. It determines surface finish, strength, corner wear, and geometric precision. Using the wrong grade of graphite can be a painful experience. It is important to know the main types of graphite grades and their primary uses.
Submicron grade graphite has a particle size of less than one micron. This grade of graphite is the most expensive. It is capable of holding sharp corners. Submicron graphite is used for reproducing extremely fine details
Premium grade graphite has a particle size that is equal or less than 5 microns. This grade of graphite is used for most small and medium high-precision mold work and die work. It is heavily used in aerospace production
High-performance grade graphite has a particle size between 10 to 20 microns. This grade of graphite has moderate cost. Its cost makes it a cost-efficient choice for larger mold and dies work.
General purpose grade graphite has a particle size above 20 microns. This grade of graphite is the least expensive. General purpose graphite is primarily used for forging dies. The advent of high-speed hard machining methods has caused the demand for this grade of graphite to plummet.
Keep in mind that there are many intermediate grades that are available. However, most shops do not benefit from having a wide range of grades. Having so many grades of graphite on the shop floor will only lead to confusion and more storage work.
No comments:
Post a Comment