USPS 955 Postal Supervisor Practice Exam 2026 - Free Postal Supervisor Practice Questions and Study Guide

Self-lubricating bushings are designed to reduce friction and wear in machinery by incorporating solid lubricants or a lubricant-embedded polymer matrix within the bushing material itself. This built-in lubrication method effectively minimizes the contact between components, leading to a reduction in noise generated during operation. Because the lubrication is consistently applied through the material, it can also help maintain performance without the need for regular maintenance or additional lubricant supply. This characteristic is especially beneficial in applications where noise reduction is crucial, such as in office equipment or household appliances, as it provides a quieter operation compared to methods that may require periodic reapplication or can be messy. The overall design of self-lubricating bushings addresses both functionality and noise control, making them an effective choice for environments that prioritize those aspects.