Caged Needle Roller Bearing NA4940 - Single Unit, 200 mm ID x 280 mm OD x 80 mm Width, High Carbon Steel Inner Ring with Oil Holes, Machined Type, Metric NA49 Series

Single machined needle roller bearing NA4940
✔️ 200 mm ID x 280 mm OD x 80 mm W; inner ring; oil holes

This single machined-type needle roller bearing (model NA4940) is built for high-radial-load shafts, compact gearboxes, and linear slide unit applications needing tight radial clearance.

✅ Model: NA4940, Metric NA49 series
✅ Dimensions: 200 mm ID x 280 mm OD x 80 mm Width
✅ Material: High carbon steel inner ring, caged machined type
✅ Oil holes included for direct lubrication; open enclosure
✅ Dynamic load capacity 518000 N; static load capacity 1120000 N
✅ Maximum speed 1600 rpm; ideal for linear slide unit and shaft use
✅ Single bearing pack; approx. weight 1.0 lb each

💡 What is a needle roller bearing used for in linear slide units and heavy-duty shafts?
Needle roller bearings provide high radial capacity in limited radial space. Here’s why they’re handy and how they’re applied:
- High radial load support for compact shaft designs and linear slide unit assemblies.
- Preferred where sealed ball bearing options are too bulky; fits tight clearance designs.
- Works well with oil-lubricated setups; oil holes and machined inner rings boost lubrication efficiency.
- Common in transmissions, pumps, and automation equipment where high load density is required.