Agricultural machinery includes planting equipment, harvesters, grain processing machinery and various field working implements, operating mainly in outdoor farmland environments. Farm working scenarios feature high content of dust, crop straw debris, mud and moisture. Working conditions change drastically with seasonal farming cycles. Short‑term high‑intensity continuous operation is very common during sowing and harvesting seasons. Mounted bearing units and deep‑groove ball bearings are the primary bearing solutions for agricultural equipment. Mounted bearing units integrate insert bearings and housings as complete assemblies, realizing simple and fast on‑site installation without complicated matching work. Spherical outer surface of insert bearings permits limited angular misalignment caused by welding deformation or assembly error of machine frames. Most bearing units are equipped with multi‑lip sealing structures, effectively blocking mud, plant residues and dust from entering internal rolling contact zones.
Deep‑groove ball bearings are widely deployed inside transmission shafts, rollers and auxiliary mechanisms of agricultural machinery, coping with comprehensive loads produced in field operation. Agricultural equipment often runs continuously for dozens of hours within harvest seasons. Rising working temperature together with external mud pollution puts forward comprehensive requirements for sealing performance and grease stability. Field maintenance conditions are limited, convenient greasing structure helps operators finish routine maintenance rapidly. After‑sales replacement demand surges sharply during farming peak seasons. Interchange‑compliant bearing units follow unified installation dimensions to facilitate quick on‑site component replacement and minimize production halt time. When selecting bearings for agricultural machinery, users need to evaluate working load, vibration level, local environmental pollution and maintenance accessibility. Seal failure is one of the most frequent failure modes for farm machinery bearings. Once contaminants penetrate inside, abrasive wear will quickly destroy rolling surfaces. Reasonable bearing configuration guarantees stable running of planting and harvesting machinery, avoids delays for farm work schedules and reduces economic loss caused by seasonal operation interruption for agricultural producers.