Rondelle frein MB 21

Overview This MB 21 lock washer is designed to secure metric lock nuts onto shafts or adapter sleeves. It prevents unintentional loosening by engaging the keyway of the shaft or sleeve. The washer is intended for single use ensuring secure fastening each time the lock nut is installed. Its construction supports stable and reliable operation in industrial applications. Features

• Engages keyway in shaft or sleeve to prevent lock nut loosening during operation
• Designed for single use to ensure consistent and reliable fastening each installation
• Supports 105 mm bore and 145 mm outer diameters for compatibility with metric assemblies
• Tab design enables secure locking by bending into nut slot
• increasing operational safety
• Simple installation and removal reduce downtime and maintenance complexity for users

Application & Usage

• Used with KM
• KML
• and HM lock nuts in rotating equipment
• Ideal for securing adapter sleeves in industrial shaft assemblies
• Compatible with metric bearing accessories in machinery maintenance