The IR 40X48X40 Needle Roller Inner Ring by SKF is a precise mechanical component designed specifically for high-performance needle roller bearings. With exact dimensions of 40 mm bore diameter, 48 mm outer diameter, and 40 mm width, this inner ring is an essential accessory in bearing assemblies where precise alignment and load distribution are critical. Manufactured by SKF, a leader in the industry, this inner ring is typically utilized in applications requiring high radial load capacity and efficiency in rotational mechanisms.
Technical specifications
| Specification | Value |
| Bore diameter (d) | 40 mm |
| Outer diameter (D) | 48 mm |
| Width (B) | 40 mm |
| Weight | Not specified |
| Basic dynamic load rating (C) | Not specified |
| Basic static load rating (C0) | Not specified |
| Limiting speed | Not specified |
| Reference speed | Not specified |
| Cage type | Not specified |
| Shielding / Sealing | Open |
| Operating temperature range | Not specified |
| Ring material | Not specified |
| Factory lubrication | Dry |
| Precision class | P0 / ABEC-1 |
| Internal clearance | CN |
| ISO / Cross-reference equivalent code | Not specified |
Technical advantages
The IR 40X48X40 Needle Roller Inner Ring is engineered for demanding applications, offering several technical benefits:
- Precision-ground surfaces ensuring optimal load distribution across the bearing assembly.
- Standard CN radial clearance, ideal for systems without preload requirements.
- Unsealed (Open) design, allowing for customized lubrication in specific environments.
- Manufactured to ABEC-1 precision class, ensuring tight tolerances and consistency.
- Compatible with a wide range of SKF needle roller bearings, ensuring versatile integration.
Typical applications
This SKF needle roller inner ring is suitable for a variety of industrial applications, including:
- Automotive transmission systems (gearboxes, differential assemblies)
- Industrial machinery (textile machines, paper processing equipment)
- Aerospace components (actuators, control systems)
- Railway engineering (bogies, traction motors)
- Heavy-duty construction equipment (excavators, cranes)
Availability and ordering
As a specialized B2B supplier, Eurobearing.eu ensures fast availability of the IR40X48X40-SKF needle roller inner ring. Businesses can easily add this product to the cart or request a quotation for bulk quantities directly through our platform.

