Practical engineering knowledge, material selection guides, and real-world applications for industrial sealing systems.
Most rotary oil seals are installed with the main sealing lip and spring facing the lubricant side. However, seal direction can vary by application, lip design, pressure condition, contamination requirement, and seal material. This guide explains how to identify the correct oil seal orientation, common installation rules, exceptions, and mistakes that can cause repeat leakage.
TC, SC, TB, and SB are common oil seal type codes used to describe lip configuration and outer diameter construction. This guide explains the usual differences between single-lip and double-lip seals, rubber-covered and metal-cased designs, common applications, material options, and how to choose the right oil seal type.
An oil seal size chart helps identify the correct seal by inner diameter, outer diameter, and width. This guide explains how to read common oil seal size markings, use ID × OD × width charts, verify shaft and housing measurements, and avoid ordering the wrong seal type or material.
TC and SC oil seals are common rotary shaft seal types with similar basic construction but different lip designs. This guide explains the typical TC vs SC oil seal structure, the role of the dust lip, key application differences, and what to confirm before choosing a replacement seal.
