The Needle Roller Inner Ring IR320X350X80 – 320X350X80 is a precision-engineered component designed for demanding industrial applications. This inner ring is a crucial part of needle roller bearings, offering enhanced performance in high-load and high-speed environments. With dimensions of 320 mm bore diameter, 350 mm outer diameter, and 80 mm width, it is ideal for use in heavy-duty machinery across various sectors. The inner ring supports the needle rollers, ensuring smooth rotation and reducing friction, making it suitable for applications where space is limited, yet high load capacity is required.
Technical specifications
| Specification | Value |
|---|---|
| Bore diameter (d) | 320 mm |
| Outer diameter (D) | 350 mm |
| Width (B) | 80 mm |
| Basic dynamic load rating (C) | — |
| Basic static load rating (C0) | — |
| Limiting speed | — |
| Reference speed | — |
| Ring material | Chrome steel 100Cr6 |
| Precision class | P0 / ABEC-1 |
Technical advantages
Built for performance and durability, the Needle Roller Inner Ring IR320X350X80 offers several distinct technical advantages:
- Manufactured from chrome steel 100Cr6, ensuring a rolling-contact fatigue life exceeding 107 cycles.
- Precision class P0 / ABEC-1, suitable for general purpose applications.
- Compatible with a wide range of needle roller bearings, enhancing versatility in equipment design.
- Standard dimensions for easy integration into existing systems without modification.
- Machined to tight tolerances for optimal performance in high-load applications.
Typical applications
The Needle Roller Inner Ring IR320X350X80 is utilized across diverse industries due to its robust design and adaptability:
- Construction machinery (concrete mixers, bulldozers, excavators)
- Automotive industry (transmissions, differentials, drive shafts)
- Agricultural equipment (tractors, combine harvesters, plows)
- Heavy-duty industrial gearboxes (reducers, conveyors, hoists)
- Railway applications (bogies, traction motors, brake systems)
Availability and ordering
Eurobearing.eu, your specialized B2B supplier for mechanical components, ensures fast availability of the Needle Roller Inner Ring IR320X350X80 – SKU: IR320X350X80-ECO. For bulk orders and specific requirements, request a quote today to enjoy competitive pricing. Add to cart now for immediate procurement.

