The Needle Roller Inner Ring IR20X25X17 – 20X25X17 – INA is a precision-engineered component designed for use in various industrial applications. Produced by INA, a reputable brand in the field of mechanical components, this inner ring boasts main dimensions of 20 mm bore diameter, 25 mm outer diameter, and 17 mm width. It is typically utilized in machinery where compact and efficient bearing solutions are required, such as in automotive transmissions and industrial gearboxes. This component serves as a crucial accessory in needle roller bearing assemblies, providing a hardened and precise surface for needle rollers to run upon.
Technical specifications
| Specification | Value |
|---|---|
| Bore diameter (d) in mm | 20 |
| Outer diameter (D) in mm | 25 |
| Width (B) in mm | 17 |
| Ring material | Chrome steel 100Cr6 |
| Precision class | P0 / ABEC-1 |
| Internal clearance | CN |
Technical advantages
The Needle Roller Inner Ring IR20X25X17 – INA offers several technical benefits that enhance its utility in demanding environments:
- Manufactured from heat-treated 100Cr6 chrome steel, ensuring a rolling-contact fatigue life exceeding 107 cycles.
- Standard CN radial clearance, facilitating smooth operation without the necessity for preload adjustments.
- Compatible with a wide range of needle roller bearings, permitting flexible integration in diverse mechanical systems.
- Compact dimensions reduce the overall weight and footprint of bearing assemblies, optimizing space utilization in complex machinery.
- Precision class P0 / ABEC-1, providing a balance of performance and cost-effectiveness for standard applications.
Typical applications
The IR20X25X17 inner ring is well-suited for a variety of industrial sectors and machinery types, including:
- Automotive transmissions and differentials
- Industrial gearboxes and reducers
- Textile machinery (spindles, looms)
- Pneumatic and hydraulic motors
- Printing presses and paper machinery
Availability and ordering
Eurobearing.eu is your specialized B2B supplier for industrial components like the IR20X25X17-INA. We ensure fast availability and offer the option to request a quote for bulk quantities. Add this product to your cart or contact us for a quotation to meet your specific requirements.

