Needle roller bearing

Needle bearing is a roller bearing with cylindrical roller. Compared with its diameter, the roller is slender and long. This kind of roller is called needle roller. Despite its small cross-section, bearings still have high load-bearing capacity. Needle-roller bearings are equipped with slender and long rollers (roller diameter D < 5mm, L/D < 2.5, L is roller length), so the radial structure is compact. When the inner diameter size and load capacity of needle-roller bearings are the same as other types of bearings, the outer diameter is the smallest, which is especially suitable for supporting structures whose radial mounting size is limited.