Machined needle roller unit NA4911UU 55 mm ID, 80 mm OD, 25 mm width, high-carbon steel, oil hole, sealed single bearing, caged NA49 metric series
✔️ 55 mm ID x 80 mm OD x 25 mm width, high-carbon steel, oil hole
This machined-type needle roller bearing with seals and inner ring is built for compact, high-load shafts and industrial transmissions, ideal for linear slide units and gearboxes.
✅ Model: NA4911UU, NA49 metric series, caged machined✅ Inner diameter: 55 mm; Outer diameter: 80 mm; Width: 25 mm
✅ Material: high-carbon steel; inner ring included; sealed unit
✅ Seals: synthetic rubber; oil hole for relubrication and contamination control
✅ Load capacity: dynamic 52,200 N; static 85,700 N
✅ Max speed: 3,000 rpm; weight ~1.0 lb; single bearing pack
✅ Perfect for compact shafts, gearboxes, transmissions, and linear slide units
✅ Use as a sealed ball bearing alternative or alongside ceramic bearing systems
💡 What is a needle roller bearing used for in industrial equipment? Needle roller bearings are used to support high radial loads where space is limited, making them a handy choice for shafts and rotating assemblies. Quick intro: They offer a slim profile with high load capacity and can work where sealed ball bearing or ceramic options are considered. - High radial load support in tight radial space; good sealed ball bearing alternative - Commonly used in gearboxes, transmissions, steering systems, and linear slide units - Sealed versions with oil holes and synthetic rubber seals help with relubrication and contamination resistance