Single Inner Ring for Needle Roller Bearing - Metric 20 mm ID, 25 mm OD, 17 mm Width; High-Carbon Steel Race for General Use, Fits RNA4904 and RNAF253517, LRT202517

Single metric inner ring for needle roller bearings
✔️ 20 mm ID, 25 mm OD, 17 mm W; HC steel; fits RNA4904 & RNAF253517

This is a single inner ring (inner race) for needle roller bearings, used in linear slide units, transmissions, gearboxes, and industrial machinery. Sold as one unit each.

✅ Part: LRT202517, LRT Metric Series
✅ Bore type: tapered; machined needle roller bearing race
✅ Dimensions: 20 mm ID × 25 mm OD × 17 mm width
✅ Material: high-carbon steel for general use
✅ Compatible with RNA4904 and RNAF253517; fits linear slide units
✅ Pack size: single inner ring (sold each unit)

💡 How does an inner ring for needle roller bearings improve linear slide unit durability and alignment? A proper inner ring provides a stable inner race that keeps rollers aligned and reduces wear. - Reduces friction and heat, helping bearings and linear slide units last longer. - Keeps concentricity and alignment for smoother motion in transmissions and guides. - Works well alongside sealed ball bearing setups or hybrid ceramic options for high-performance systems.