Needle Roller RNAF556820 Separable Caged Bearing, 55 mm ID x 68 mm OD x 20 mm Width, High-Carbon Steel, Open Type, Single-Row Metric for Heavy-Duty Applications

Single needle roller bearing RNAF556820, metric
✔️ 55 mm ID x 68 mm OD x 20 mm width; open type, 9000 rpm max

This single, open needle roller bearing with a separable cage fits compact shafts and housings. It is commonly used in industrial machinery, gearboxes, transmissions and linear slide units where tight radial space and high load capacity are required.

✅ Model: RNAF556820, single-row caged separable
✅ Dimensions: 55 mm ID x 68 mm OD x 20 mm width
✅ Material: high-carbon steel; open enclosure, no oil hole
✅ Load ratings: dynamic 28600 N; static 66000 N; max speed 9000 rpm
✅ Application: ideal for tight radial spaces, linear slide unit installations
✅ Notes: compare with sealed ball bearing or ceramic options for specific needs
✅ Series: RNAF Metric Series; weight ~0.370 lb; sold as single bearing each

💡 What is a needle roller bearing used for in linear slide units? Needle roller bearings are handy when you need high radial load capacity in small spaces while keeping shaft diameter low. - Provides high radial load support with a slim cross section and keeps systems compact - Works well in linear slide unit setups where space is tight and guiding accuracy matters - A good choice over sealed ball bearing options when radial load capacity is the priority - Consider ceramic or sealed alternatives for lower friction or contamination protection