LM12UU 12/21/30 mm Linear Bearing - RepRap 3D CNC

Closed linear bearings are widely used in linear motion technique. The outer jacket is made of bearing steel. The middle part of the bearing is made of plastic. They are perfect for use in dirty industrial conditions because they have a rubber seal, which prevents various types of filings or dirt from entering the bearing. Linear ball bearings are one of the most basic and important elements of the linear motion technique. The structure itself, as well as their high strength and longevity, is undoubtedly a unique achievement of technology. Technical data Maximum travel speed from 3-5m / s Friction coefficient of the order: 0.001-0.005 Working in temperature -20 to + 80 ° C Outer diameter: 21mm Shaft diameter: 12mm Overall length: 30mm