The Needle Roller Inner Ring IR12X15X12,5 – 12X15X12,5 – INA is a precise mechanical component designed for use in conjunction with needle roller bearings. Manufactured by INA, this inner ring features a bore diameter of 12 mm, an outer diameter of 15 mm, and a width of 12.5 mm. It is commonly used in industrial applications where high radial loads are present, and space is limited. This inner ring is an essential accessory for ensuring the proper function and longevity of needle roller bearings in high-performance machinery.
Technical specifications
| Specification | Value |
| Bore diameter (d) | 12 mm |
| Outer diameter (D) | 15 mm |
| Width (B) | 12.5 mm |
| Material | Chrome steel 100Cr6 |
| Operating temperature range | -20 / +120 °C |
| Precision class | P0 / ABEC-1 |
Technical advantages
The Needle Roller Inner Ring IR12X15X12,5 offers several technical advantages:
- Manufactured from heat-treated chrome steel 100Cr6 for enhanced durability in high-load applications.
- Compatible with a wide operating temperature range from -20 to +120 °C, suitable for various industrial conditions.
- Precision class P0 / ABEC-1 ensures reliable performance in standard applications.
- Optimized dimensions (12x15x12.5 mm) for efficient space utilization in compact machinery designs.
- Specifically designed to complement needle roller bearings, enhancing their operational efficiency.
Typical applications
This needle roller inner ring is suitable for a range of industries and machinery, including:
- Automotive transmission systems (gearboxes, differentials)
- Industrial automation (conveyor systems, robotic arms)
- Agricultural machinery (harvesters, tractors)
- Construction equipment (excavators, loaders)
- Aerospace components (actuators, landing gear systems)
Availability and ordering
Eurobearing.eu, a specialized B2B supplier, ensures fast availability of the Needle Roller Inner Ring IR12X15X12,5-INA. Businesses can easily add this item to their cart for immediate purchase or request a quotation for bulk quantities to meet their specific needs.

