Item Type: Wheel Hub Material: Aluminum Alloy Housing , Stainless Steel Bearings Model: 3614-1616-0006 Size: Approx.16mm / 0.63in High, 6mm / 0.24in Aperture Purpose: Provide Excellent Radial Support for Passing Shafts, Suitable for Intelligent Robots As Coupling Attachments Package List 4 x Wheel Hubs 2 x Bearing Bases Please confirm whether the size matches before use 1Double bearing housing can provide excellent radial support for the passing shaft. 2You can press two bearings into a single mount, which allows perfect concentricity between the two bearings, allowing the shaft to rotate with minimal friction or radial clearance. 3The outer diameter is 32mm (can be fixed by the clamping place) and the 16mm hole pattern has four M4 threaded holes and four 4mm diameter through holes respectively, making the installation options very rich. 4The outer countersunk hole can place the screw head below the surface. The countersunk hole can avoid the interference of the screw head, so it will not interfere with the rotating parts (wheel hub, collar, connector, etc.) to ensure the flatness of the installation plane. 5Scope of application, double bearing housing is suitable for intelligent mechanical robots as coupling drive accessories.