HN 15.5x20x18 RBF - Needle Roller Bearing Without Inner Ring

Application of the HN 15.5x20x18 Bearing

The HN 15.5x20x18 needle roller bearing from RBF is designed for applications where minimal radial installation space and high radial load capacity are required. As a bearing without an inner ring, it uses the shaft directly as the raceway, making it ideal for compact mechanical designs. This bearing is widely used in gearboxes, transmissions, drive systems, industrial machinery, and precision mechanisms where space optimization is critical. It is commonly installed directly in a bearing housing as part of a compact bearing unit.

Key Advantages and Operating Characteristics

The HN 15.5x20x18 RBF bearing offers high durability and an excellent load-to-size ratio. The needle rollers, guided by a precision cage, ensure even load distribution and stable operation at higher rotational speeds. The absence of an inner ring reduces overall bearing dimensions and weight, allowing for simplified mechanical design. This solution is particularly effective in demanding industrial applications, provided that the shaft surface is properly hardened and ground to serve as a raceway.

Technical Specifications

• Bearing type: Needle roller bearing without inner ring
• Designation: HN 15.5x20x18
• Inner diameter: 15.5 mm
• Outer diameter: 20 mm
• Width: 18 mm
• Manufacturer: RBF
• Application: Industrial machinery, bearing housing, compact bearing unit assemblies

Main Description

The HN 15.5x20x18 RBF is a precision needle roller bearing without an inner ring, engineered for industrial applications requiring high radial load capacity within a very limited installation space. Its design, based on a cage with needle rollers, allows the shaft to function directly as the inner raceway, reducing component count and enabling compact mechanical assemblies.

This bearing is commonly used in production machinery, drive systems, and gear units where reliability, repeatable performance, and space efficiency are essential. When installed under proper conditions, including a hardened and ground shaft surface, the HN 15.5x20x18 bearing delivers stable operation, low rolling resistance, and extended service life. It is a proven solution for B2B customers seeking compact, high-performance bearing components for professional industrial use.

FAQ - Frequently Asked Questions

What is the HN 15.5x20x18 bearing?
It is a needle roller bearing without an inner ring, using the shaft as the raceway.

What type of loads does this bearing support?
It is designed to carry radial loads only.

Does this bearing require special shaft preparation?
Yes, the shaft must be hardened and ground to ensure proper operation and durability.

Where is this bearing typically used?
It is commonly used in gearboxes, transmissions, and compact industrial machinery.