NKXR45 -Z NKE needle roller bearing

NKE NKXR45-Z Combined Needle Roller Bearing (With Cover)

The NKE NKXR45-Z is a high-specialty combined rolling bearing unit designed to simultaneously handle radial loads and extreme axial loads acting in a single direction. This design integrates a high-capacity radial needle roller assembly with a cylindrical roller thrust bearing. As a result, the NKXR model offers significantly higher axial rigidity than the NKX series. The standout feature of the -Z version is the protective sheet metal cover, which permanently caps the thrust section, shielding it from dust and moisture while ensuring optimal grease retention. It is the perfect solution for compact bearing arrangements on 45 mm shafts.

Application

• CNC Machine Tools: High-rigidity support for drive shafts and spindles requiring maximum axial precision.
• Automation & Robotics: Compact rotation axes and joints in industrial robots subjected to heavy longitudinal pressure.
• Pumps & Compressors: Stable support for rotating elements under complex dynamic loads.
• Printing Machinery: Precise guidance for printing cylinders within limited installation spaces.
• Automotive Engineering: Transmissions and drive systems in heavy-duty or specialized vehicles.

Technical Specification

• Manufacturer: NKE Bearings (Austria).
• Designation: NKXR45-Z.
• Dimensions: 45 mm (ID) × 58 mm (OD) × 32 mm (Total Width).
• Type: Combined bearing (needle roller + cylindrical roller thrust).
• Cover (-Z): Sheet metal cap on the thrust section (non-separable).
• Material: Premium heat-treated bearing steel.

Features and Benefits

• Superior Axial Rigidity: The use of rollers in the thrust section ensures linear contact and minimal deformation under load.
• Integrated Design: Accommodates forces from two directions, eliminating the need for two separate bearings and shortening the shaft.
• Operational Security (-Z): The protective cover simplifies lubrication and significantly extends maintenance intervals.
• Extreme Compactness: A 58 mm outer diameter allows for the design of very slender mechanisms with powerful load capacity.
• Austrian Precision: NKE production guarantees running accuracy and a long fatigue life even in continuous operation.

Why Choose This Product

By choosing the NKE NKXR45-Z, you are investing in European engineering that optimizes both space and performance. Unlike ball-type versions, this cylindrical roller thrust bearing allows for much higher pressure handling, directly improving machining accuracy and machine longevity. The covered version (-Z) provides a component ready for harsh industrial environments, more resilient to contaminants and easier to maintain.