6404 Ball Bearing ID 20mm OD 72mm Width 19mm6404 Open Ball Bearing 20mm ID Chrome Steel, Open Type with Grease The 6404 is an open style deep groove ball bearing made from durable 52100 chrome steel. Designed for smooth, high speed rotation, its pre lubricated with grease and ideal for applications where airflow, visual inspection, or frequent re greasing is preferred. Size: 20mm ID x 72mm OD x 19mm Width Open design no seals for direct access to grease Made from tough 52100 chrome steel Pre
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