The Needle Roller Inner Ring IR40X45X20,5 – 40X45X20,5 – INA is a crucial component in bearing assemblies, designed to accommodate radial loads and enhance the performance of needle roller bearings. Manufactured by INA, this inner ring features a bore diameter of 40 mm, an outer diameter of 45 mm, and a width of 20.5 mm. It is primarily used in industrial applications where compact yet robust bearing solutions are required, such as in automotive and aerospace machinery.
Technical specifications
| Specification | Value |
| Bore diameter (d) | 40 mm |
| Outer diameter (D) | 45 mm |
| Width (B) | 20.5 mm |
| Ring material | Chrome steel 100Cr6 |
| Precision class | P0 / ABEC-1 |
| Internal clearance | CN |
Technical advantages
The Needle Roller Inner Ring IR40X45X20,5 – 40X45X20,5 – INA offers several technical benefits:
- Constructed from 100Cr6 chrome steel, ensuring rolling-contact fatigue life exceeds 107 cycles.
- Standard CN radial clearance provides optimal fit for assemblies requiring precise alignment without preload.
- Precision class P0 / ABEC-1 guarantees consistent performance in high-demand applications.
- Designed for seamless integration with needle roller bearings, enhancing load distribution and operational stability.
- Compact dimensions allow for use in space-restricted environments without sacrificing load capacity.
Typical applications
This needle roller inner ring is suitable for a variety of industries and machinery, including:
- Automotive powertrains (gearboxes, differentials)
- Aerospace systems (actuators, control surfaces)
- Construction machinery (hydraulic pumps, drive systems)
- Industrial automation (conveyor systems, robotic arms)
- Textile manufacturing equipment (spinning machines, looms)
Availability and ordering
Available at Eurobearing.eu, a specialized B2B supplier for mechanical industrial components, the Needle Roller Inner Ring IR40X45X20,5-INA can be quickly sourced for your production needs. For bulk orders or quotations, please add to cart or request a quotation directly on our platform.
