LMF12UU Round Linear Ball Bearing 12x21x30mm

From the shop's description

LMF12UU Round Linear Ball Bearing 12x21x30mm Flanged Metal Shielded Deep Groove Ball Bearings: Manufactured to the same principal sizes as standard bearings but fitted with metal shields, these bearings have an additional flange to allow fitting into housings flush against the shoulder of the flange. They are often used on steel tracks as guides and supports. The shields serve to offer protection to prevent ingress of debris and dust whilst retaining the grease within the bearing Benefits: Cost effective replacement bearing, Flanged design, Metal shielded Model :LMF12UU Material :Bearing Steel Inner Diameter: 12mm Outer Diameter: 21mm Length: 30mm Flange Diameter: 42mm Flange Thickness: 6mm Mounting Hole Dia.: 4.5mm Mounting Hole Spacing: 32mm Package Includes: 1x LMFxxUU Bearing Related Products: Mechanical Parts