Full definition
In Mexico, "flecha" is the standard industrial term for a rotating shaft that transmits torque — "flecha de transmision" (drive shaft), "flecha del motor" (motor shaft), "flecha cardanica" (cardan/universal joint shaft). The term derives from the straight, cylindrical form resembling an arrow (flecha). In all other Spanish-speaking countries and in technical documentation: "eje" (axis/shaft) is the standard term — "eje de transmision" (drive shaft), "eje del motor" (motor shaft). In Spain: "eje" is exclusively used; "flecha" is unknown in this context. For technical specifications: "eje" is the ISO/DIN translation standard and appears in all translated engineering documentation. For B2B SEO targeting Mexico: "flecha de transmision" and "flecha de acero" (steel shaft) generate significant search volume that "eje de transmision" does not fully capture — both terms must be included. Material specifications are identical: AISI 1045 (standard), AISI 4140 (high-load), with diameter selected by torque, deflection, and critical speed calculations. Key shaft accessories: "chumacera" (pillow block bearing), "cuña/chaveta" (key), and "cuñero" (keyway) in Mexican terminology.