IMPA 351716 Cam and groove coupler - material brass Type A (male part with inner thread) - connection 3/4"
5Pcs 3M20 Teeth Flat on Both Sides, Groove Width 11, Timing Belt Pulley AF Type Inner Hole 5/6/6.35/7/8/10/11 _ - AliExpress Mobile
Bearing Type: 625 V Groove Pulley Inner Diameter: 5mm V-type Pulley CNC Wheel for 3D Printers Industry Mechanical : Amazon.co.uk: Business, Industry & Science
Joint Kit, drive shaft Groove Type : Inner Wheel Side GSP (Nr. 899032) - Buy in REXBO online store