In mechanical engineering and machinery, a bearing is formally classified according to its specific rolling elements and structural design. Common names include ball bearings (using spherical metal balls), roller bearings (using cylindrical or tapered rollers), needle bearings (using thin, elongated cylindrical rollers), and thrust bearings (designed to handle axial forces). In navigation, a directional heading is simply called a compass bearing. Always use precise technical names when ordering replacement mechanical parts.
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