2906 Series Aluminum Set Screw Collar (6mm Bore, 8mm Length) - 2 Pack

Set screw collars are the smallest of all the collars.  They create less rotating mass and are well balanced so they don’t create vibration in high-speed applications.  Set screw collars are best used with D-shaft so the set screw doesn’t marr an edge that might come in contact with a bearing.