As material science advances, aerospace engineers are working with increasingly hard, exotic alloys and composites designed to withstand extreme heat, pressure, and stress. These materials demand a level of precision that conventional abrasive methods simply cannot deliver. Achieving the tight tolerances, flatness, and surface finishes required by modern aircraft components calls for the most precise abrasive technology available: diamond.
Kemet International Ltd. has spent decades refining a range of diamond lapping and polishing systems that are now relied upon throughout the aircraft and aerospace sectors, supporting both original equipment manufacturing (OEM) and maintenance, repair and overhaul (MRO) applications. These systems remain one of the most efficient and dependable ways of producing the precision flat, polished surfaces that aerospace components demand.
At the heart of this capability are Kemet's ISO-assured diamond abrasives, which allow precision lapping of aircraft components to be carried out reliably in both production environments and in-service maintenance settings. Each slurry or compound is formulated as a specific concentration of graded diamond powder, blended with a carefully selected chemical carrier. This combination is engineered to balance several critical factors at once: optimal stock removal, a superior surface finish, ease of cleaning, resistance to temperature fluctuations, and consistent lubricity throughout the process.
This level of control is what allows engineers to achieve repeatable, predictable results, whether they are working on a single prototype component or a high-volume production run.
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Versatility Across Aerospace Components
The range of parts that benefit from diamond lapping is broad. Hydraulic parts, engine seals, bearings, and metal-to-metal faced seals on pumps and valves can all be lapped flat using Kemet's diverse selection of flat lapping machines. For gear faces, the addition of a Kemet composite annular grooved plate enables precise shoulder lapping, opening up further applications within engine and transmission assemblies.
Beyond flat surfaces, Kemet's portable hand lap kits and Helilaps extend diamond lapping and polishing into more intricate geometries, effectively lapping the internal faces and diameters found in landing gear components and numerous other aviation subassemblies where access is limited and precision cannot be compromised.
Achieving Exceptional Flatness
Through diamond lapping and polishing, seals used in pumps, valves, and engines, manufactured from demanding materials such as Tungsten Carbide, Stellite, Ceramic, Silicon Carbide, Carbon, and Brass, can achieve flatness levels of just two to three light bands, or less than 0.001mm. Remarkably, this degree of precision is achievable not only in controlled laboratory conditions but under real production conditions, making it a practical solution for high-throughput manufacturing as well as bespoke maintenance work.
Kemet's capabilities extend well beyond diamond lapping alone. The company offers a comprehensive range of products spanning deburring through to passivation, covering the full spectrum of aerospace engineering and surface finishing requirements. This breadth allows Kemet to deliver genuine turnkey solutions, giving aerospace manufacturers and MRO providers a single, trusted partner for their precision finishing needs rather than having to coordinate multiple suppliers.
Precision You Can Rely On
Ultimately, it is this combination of precision, consistency, and versatility that has made Kemet's diamond lapping and polishing systems a trusted choice across the aerospace industry. As components continue to be manufactured from harder, more advanced materials, and as tolerances continue to tighten, the role of proven diamond lapping technology in maintaining airworthiness and performance standards will only continue to grow.
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