Single NA4909UU Machined Needle Roller Bearing, 45 mm ID x 68 mm OD x 22 mm Width, High Carbon Steel with Oil Hole for Linear Slide Unit, Heavy Duty Industrial Applications

Single NA4909UU machined needle bearing, 45×68×22 mm
✔️ Model NA4909UU; high carbon steel; oil hole; 45×68×22 mm

This single machined needle roller bearing is built for compact shafts and linear slide units in industrial machinery, automation, and power transmission.

✅ Inside diameter: 45 mm; Outside diameter: 68 mm; Width: 22 mm
✅ High carbon steel; machined type with oil hole for lubrication
✅ Designed for linear slide units, compact shafts, gearboxes, and transmissions
✅ Single bearing (pack of 1) for replacement and prototype builds

💡 What is a needle roller bearing used for in linear slide unit and compact shaft applications? Needle roller bearings deliver high radial load capacity in a slim profile, ideal where a sealed ball bearing would be too large or space is limited. Use this bearing when you need compact form factor and strong radial support for guided motion and power transfer. - High radial load support in tight axial envelopes, replacing larger sealed ball bearing options - Fits compact shafts and linear slide unit guides for accurate motion control and long service life - Machined type with oil hole allows routine lubrication for durability in gearboxes and transmissions