Needle roller bearing NA6903UU, single machined caged type 17 mm ID x 30 mm OD x 23 mm W, high carbon steel, oil hole, sealed unit with inner ring, NA69 series, 7500 rpm, 19,800 N dynamic capacity

Single NA6903UU needle roller bearing, sealed unit
✔️ 17 mm ID x 30 mm OD x 23 mm W, high-carbon steel, oil hole

This is a single machined caged needle roller bearing with inner ring and seals, built for heavy-duty shafts and compact linear slide units where space is tight.

✅ Machined caged type for precise shaft guidance and low axial play
✅ 17 mm inside diameter, 30 mm outside diameter, 23 mm width (metric NA69 series)
✅ High carbon steel raceways with synthetic rubber seals and integrated oil hole
✅ Includes inner ring; sealed unit suitable as a sealed ball bearing replacement in some linear slide units
✅ Dynamic capacity ~19,800 N, static capacity ~30,600 N; max speed around 7,500 rpm
✅ Ideal for applications needing high radial load support in tight radial spaces

💡 What is a needle roller bearing used for in compact linear slide units? Needle roller bearings are handy when you need high radial load capacity in a slim package. - Supports heavy radial loads on small-diameter shafts, useful for compact linear slide units and shaft guides - Low friction profile and sealed options make them a good sealed ball bearing alternative in confined assemblies - Inner ring and synthetic seals help extend service life in lubricated or oil-hole maintainable setups