The Needle Roller Inner Ring LR45X50X25,5 – 45X50X25,5 – INA is a precision-engineered component designed for use in various industrial applications. Manufactured by INA, this inner ring is part of the bearing accessories category, specifically tailored for needle roller bearings. Its dimensions, with a bore diameter of 45 mm, an outer diameter of 50 mm, and a width of 25.5 mm, make it suitable for compact mechanical assemblies where space constraints are critical. This component is commonly utilized in automotive, aerospace, and manufacturing industries, providing a robust solution for high-load and high-speed applications.
Technical specifications
| Specification | Value |
| Bore diameter (d) | 45 mm |
| Outer diameter (D) | 50 mm |
| Width (B) | 25.5 mm |
| Material | Chrome steel 100Cr6 |
| Precision class | P0 / ABEC-1 |
| Internal clearance | Standard CN |
Technical advantages
The Needle Roller Inner Ring LR45X50X25,5 – INA offers numerous technical advantages that enhance its performance in demanding environments:
- Constructed from heat-treated 100Cr6 chrome steel, ensuring a rolling-contact fatigue life exceeding 107 cycles.
- Standard CN radial clearance, providing optimal fit for assemblies without preload.
- Compatible with a wide range of needle roller bearings, enhancing versatility in application.
- Designed for high-speed operations, suitable for applications requiring rapid rotational speeds.
- Precision class P0 / ABEC-1, ensuring consistent dimensional accuracy and fit.
Typical applications
The Needle Roller Inner Ring LR45X50X25,5 – INA is ideal for use in a variety of specific industries and machinery:
- Automotive industry (gearboxes, transmissions, differential assemblies)
- Aerospace sector (actuators, landing gear systems, flight control systems)
- Manufacturing equipment (injection molding machines, CNC machinery)
- Heavy machinery (cranes, excavators, bulldozers)
Availability and ordering
Eurobearing.eu, as a specialized B2B supplier, offers fast availability of the Needle Roller Inner Ring LR45X50X25,5 – INA. Businesses can request a quote for bulk quantities to suit their operational needs. Visit our website to add this component to your cart or contact us for further inquiries.

