NSK 6904-ZZNR Deep Groove Ball Bearing - 20 mm ID, 37 mm OD, 9 mm Width STI Suitable for bits with 4

Suitable for bits with 4 mm halfmoon drive (Wera series 9) and 4 mm HIOS drive (Wera series 21): with quick-release chuck

They are non-sterile

Designed for high-pressure refrigerants including R410a

Engineered for efficiency

NSK 6904-ZZNR Deep Groove Ball Bearing - 20 mm ID, 37 mm OD, 9 mm Width STI Suitable for bits with 4Deep Groove Ball Bearing NSK deep groove ball bearings are versatile, robust, and accommodate radial and axial loads in both directions. Their simple design, low friction, and high speed capability make them suitable for a wide range of industrial applications, from electric motors to gearboxes. Sealed and shielded variants protect against contamination, while open versions allow easy lubrication.