The Needle Roller Inner Ring IR17X21X16 – 17X21X16 by INA is a specialized bearing accessory designed for demanding industrial applications. This component is precisely engineered to facilitate smooth motion in needle roller bearings. Measuring 17 mm in bore diameter, 21 mm in outer diameter, and 16 mm in width, it is commonly used in high-load settings where compact design and efficient performance are required. The INA IR17X21X16 needle roller inner ring is integral to various industrial machinery, ensuring accurate and reliable motion transmission.
Technical specifications
| Specification | Value |
|---|---|
| Bore diameter (d) | 17 mm |
| Outer diameter (D) | 21 mm |
| Width (B) | 16 mm |
| Ring material | Chrome steel 100Cr6 |
| Precision class | P0 / ABEC-1 |
| Internal clearance | CN |
| Operating temperature range | -20 / +120 °C |
Technical advantages
The Needle Roller Inner Ring IR17X21X16 – 17X21X16 offers several technical benefits tailored to industrial needs:
- Manufactured from heat-treated 100Cr6 chrome steel, ensuring a rolling-contact fatigue life exceeding 107 cycles.
- Standard CN radial clearance, ideal for applications where no preload is applied.
- Engineered for high-load environments, providing robust support to needle roller bearings.
- Compatible with a wide range of lubricants, enabling versatile usage across different operational conditions.
- Precision class P0 / ABEC-1, suitable for general-purpose industrial applications.
Typical applications
The IR17X21X16 inner ring is utilized across various specialized industries, including:
- Automotive manufacturing (transmission systems, drive shafts)
- Industrial machinery (conveyor systems, gearboxes)
- Textile machinery (spindle assemblies, looms)
- Packaging equipment (rollers, sealing machines)
- Pulp and paper industry (calender rolls, pulp refiners)
Availability and ordering
Eurobearing.eu is your trusted source for the Needle Roller Inner Ring IR17X21X16 – 17X21X16 – INA. We offer fast availability and the option to request a quote for bulk quantities. Visit our website to add this item to your cart or request a quotation today.

