Design Principles

The design principle of needle roller bearings is to utilize rollers with a very small diameter, referred to as 'needles'. This design allows the bearing to have a small diameter relative to its length. Needle rollers are arranged within a cylindrical outer shell, typically without an inner ring, or utilizing the shaft as the inner raceway surface. As the length of the rollers exceeds their diameter, needle roller bearings can provide high load-carrying capacity while maintaining a low sectional height.

Performance Features

The performance features of needle roller bearings include:

• High load-carrying capacity: Due to the high length-to-diameter ratio of the needle rollers, these bearings can support high loads within a small radial space.
• Low sectional height: Needle roller bearings have a low sectional height, suitable for compact designs.
• Reduced friction: The small diameter of the rollers reduces friction with the raceways.
• Variety of designs: Needle roller bearings come in various designs, including those with inner rings, without inner rings, sealed, open, single-row, and double-row, among others.
• Adaptability: Certain needle roller bearing designs allow for misalignment use with slight misalignments.

Application Scenarios

Needle roller bearings are suitable for a variety of scenarios, including:

• Automotive: In components such as engine connecting rods, cam followers, gearboxes, etc.
• Industrial: In textile machinery, printing machinery, agricultural machinery, etc.
• Medical equipment: In high-precision medical scanning devices.
• General machinery: In a wide range of applications for various light to heavy machinery, especially when space is at a premium.