Which form of carbon is used as a dry lubricant?

Graphite, an allotrope of carbon, is used as a dry lubricant due to its slippery nature and ability to provide lubrication at high temperatures. It is often preferred over liquid and oil lubricants. Graphite's applications include the food industry, air compressors, machine shops, locks, piano actions, ball bearings, open gears, and brass instrument valves.