The NSK UCF208 4-Bolt Flange Bearing Unit is a ready-to-install mounted bearing assembly designed to support rotating shafts in industrial and mechanical applications.

It features a UC208 insert bearing mounted inside a strong F208 square cast iron flange housing. The insert bearing is self-aligning to help compensate for minor shaft misalignment and is secured to the shaft using set screws. The unit also includes a grease nipple for easy maintenance and extended service life.

This bearing unit is commonly used in conveyor systems, roller shafts, machinery repairs, fabrication projects, agricultural equipment, and workshop applications.

Key Features

• NSK 4-bolt flange bearing unit
• 40mm shaft bore
• Square cast iron flange housing
• Self-aligning UC208 insert bearing
• Set screw shaft locking
• Grease nipple for relubrication
• Ready to install
• Suitable for light to medium-duty machinery

Specifications

Koyo/JTEKT lists UCF208 with 40mm bore, 130mm flange size, 102mm bolt centres, 16mm mounting holes, M14 bolt size, and 49.2mm bearing width. RS also lists UCF208-style units as 40mm ID, 130mm length/width, 51.2mm depth, and cast iron 4-hole flange housing.