Single Machined Needle Roller Bearing NA4905, 25 mm ID x 42 mm OD x 17 mm Width, High Carbon Steel Caged Inner Ring with Oil Holes, High-Speed Open Type for Industrial Linear Slide Units

Single machined needle roller bearing NA4905
✔️ 25 mm ID x 42 mm OD x 17 mm W; High Carbon Steel; oil holes

This single machined-type needle roller bearing features a caged inner ring and oil holes for lubrication. It's typically used in compact linear slide units, gearboxes, and industrial machinery where space is tight and high radial load capacity is needed.

✅ Model: NA4905 (NA49 metric series)
✅ Inner diameter: 25 mm; Outer diameter: 42 mm; Width: 17 mm
✅ Material: High carbon steel; open enclosure with oil holes
✅ Dynamic load capacity: 23,700 N; Static load capacity: 30,700 N
✅ Maximum speed: 13,000 rpm; caged machined type for high-speed use
✅ Pack: single bearing sold each; SKU 1912003; weight ~1.0 lb

💡 What is a needle roller bearing used for in compact linear slide units and gearboxes? Needle roller bearings are handy when you need a low-profile rolling element that handles high radial loads while saving space. - Ideal for linear slide unit applications where compact size and high radial capacity matter - Common in compact gearboxes and transmissions to reduce friction at higher rpm - Choose caged machined types with oil holes for easier lubrication and maintenance in industrial systems - Consider sealed ball bearing or ceramic options if contamination resistance or extreme speeds are required