ZIBOO NTN 6821 Single Row Radial Ball Bearing 105x130x13mm

NTN 6821 open-type radial bearing

The ZIBOO NTN 6821 is a single-row radial ball bearing built for electrician tools that require smooth rotation under moderate radial loads. Its open design allows easy lubrication access and suits assemblies where external sealing is already provided. The 105 mm bore and 130 mm outside diameter fit standard housings specified for the 6821 series. Electricians and maintenance technicians will find it a direct replacement for worn originals.

Sustained-load behaviour with open construction

Under continuous operation the open bearing runs cooler than sealed variants because fresh lubricant can be introduced and contaminants can escape. The single-row geometry distributes load evenly across the balls while the 13 mm width keeps the contact patch stable at constant speeds. Builders who need integrated seals or higher axial capacity should select a different series.