NKXR15 -Z NKE needle roller bearing

NKE NKXR15-Z Combined Needle Roller Bearing (Locating Unit with Cover)

The NKE NKXR15-Z is a high-performance combined rolling bearing that integrates a radial needle roller bearing and a thrust cylindrical roller bearing into a single, compact unit. The unique feature of the -Z version is the integrated steel cover over the thrust section. This design creates an effective gap seal that prevents lubricant loss due to centrifugal force and protects the thrust raceway from dust and debris. This makes the bearing ideal for tight-space applications requiring simultaneous handling of radial loads and unidirectional axial loads at high rotational speeds.

Application

• Precision Machine Tools: Spindle and drive shaft support requiring high axial rigidity.
• Automation & Robotics: Compact drives and robotic arms where installation space is critical.
• Automotive Industry: Transmissions, steering systems, and high-pressure pumps.
• Textile & Printing Machinery: Mechanisms requiring precise positioning of 15 mm shafts.
• Vertical Spindles: The -Z cover prevents lubricant from leaking out of the thrust section due to gravity.

Technical Specification

• Manufacturer: NKE Bearings (Austria).
• Designation: NKXR15-Z.
• Dimensions: 15 mm (ID under needles) × 24 mm (OD) × 23 mm (Total width).
• Type: Combined (radial needle + shielded thrust cylindrical roller).
• Protection: Integrated steel thrust cover (-Z).
• Cages: Precision-guided steel cages ensuring high-speed stability.

Features and Benefits

• Integrated Protection (-Z): The cover protects against contamination and allows for longer maintenance-free intervals.
• Extreme Rigidity: Cylindrical rollers in the thrust section offer significantly higher axial load capacity than ball-bearing versions.
• Space-Saving Design: Eliminates the need for separate radial and thrust bearings, reducing total shaft length.
• Austrian NKE Quality: Precision engineering results in low vibration and quiet operation.
• Shaft-as-Raceway: Enables the use of a stiffer shaft (requires a hardened and ground shaft surface).

Why Choose This Product

By choosing the NKE NKXR15-Z, you are investing in a "Premium Locating Unit." In 15 mm shaft applications involving complex loads, standard needle bearings often fall short. The NKXR15-Z with its additional thrust section cover provides security for your machinery – minimizing the risk of failure due to lubrication loss and ensuring maximum shaft guidance precision in an extremely small footprint.