bujes

Bujes are mechanical components that create a bearing surface between two parts, enabling sliding or rotating movement while reducing friction and wear. In engineering contexts they are typically called bushings or sleeves in English, and they serve to transmit loads while isolating parts from direct metal-to-metal contact.

Materials used for bujes vary widely. Common metals include bronze and brass alloys, steel, and aluminum bronze, chosen for their load capacity and wear resistance. Engineered polymers such as PTFE, nylon, and UHMWPE are used for low friction and self-lubricating properties. Elastomeric or composite variants combine a metal sleeve with rubber or other polymers to provide vibration isolation and damping, making them suitable for automotive and machinery applications. Some bushings are lined with lubricants or graphite to further reduce wear.

Design considerations for bujes include bore diameter, outer diameter, length, and overall fit, which determine clearance and load capacity. Lubrication method is important: oil or grease lubrication is common, while dry-lubricant or self-lubricating liners are used in sealed or difficult-to-maintain environments. Operating conditions such as load, speed, temperature, misalignment, and exposure to chemicals or corrosion strongly influence material selection and service life.

Applications of bujes are widespread. They are found in automotive systems such as suspensions, steering linkages, and engine mounts, as well as in hinges, pivot points, and a variety of industrial machinery. In some systems, elastomeric bushings are used to absorb shocks and reduce vibration, while metal-backed bushings provide higher load capacities.

Manufacturing and selection typically involve turning, drilling, or pressing bushings into housings or sleeves. Standard sizes and duty ratings are available from manufacturers, with engineering data guiding material choice, lubrication needs, and compatibility with operating conditions.