[Size] - F684ZZ ABEC1 bearing (I.D.=4mm, O.D.=9mm, Thickness=4mm, Flange Dia: 10.3mm).[Durable] - Chrome Steel (GCr15) races offer high hardness and great wear resistance, thus extend bearings' service life.[Load & Speed] - Dynamic load rating of 545N and static load rating of 182N. The limiting speed is 53000 RPM under grease lubricating.[Easy to Maintain] - Shields on Both sides to keep lubricant in. Z1 noise level for most general use.[Application] - Commonly used for glider/rocker arm, wheel of the cart, lawnmower, printers, fax machines, power tools, and other homemade projects.
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