Lapping slurries or pastes are used to produce precision surfaces with controlled surface-finish and form characteristics.
Lapping slurries or pastes are used to produce precision surfaces with controlled surface-finish and form characteristics. Surface finish characteristics can include average surface roughness, surface roughness , peak count, bearing area, and several other roughness parameters. Surface form characteristics can include flatness, warp or bow, waviness and several other form parameters. Lapping products are usually specified by type of abrasive, abrasive grain grit size, and vehicle type. Lapping abrasive grits include aluminum oxide, silicon carbide, boron carbide, diamond and garnet. Average grit sizes vary from 0.25 to over 100 microns. Vehicles can be water or water-based, oil or grease-based, solvents or synthetic fluids. Lapping compounds are used to finish the surfaces of critical components such as hardened precision shafts, gears, tools, tooling, valve seats, mechanical seals (seal faces), bearing races, bearing balls, dimensional gage or gauge parts, surface plates, optical products, surface plates, spacers, and many industrial products.