20mm Extra-Narrow Light-Duty B-Lock Set-Screw Bearing Single Sealed Ball Unit for Linear Slide Units and Small Motors, Precision Radial Support K004-style Lock

20mm extra-narrow set-screw B-lock bearing
✔️ Single sealed unit, 20mm bore, extra-narrow, light duty set-screw lock

This single sealed ball bearing is an extra-narrow B-lock set-screw unit designed for tight shafts, linear slide units, small motors and hobby projects. Ceramic options are available for higher speed or heat resistance.

✅ Bore: 20mm
✅ Style: extra-narrow B-lock set-screw design
✅ Seal: single sealed ball bearing for low maintenance
✅ Use: light-duty radial loads, ideal for linear slide unit applications
✅ Cross-reference: K004-style fit for common shafts and housings

💡 What is a sealed ball bearing used for in linear slide units and small motors? Sealed ball bearings keep lubrication in and grime out so rotating shafts run smoother and need less upkeep. They’re handy when you want compact, reliable shaft support. - Improves motion accuracy in linear slide unit and reduces contamination-related wear - Lowers maintenance on small motors; ceramic options provide higher speed and heat tolerance - Extra-narrow, set-screw B-lock styles secure shafts in tight assemblies for space-saving support