Bearing:flexible coupling 1.Material :Aluminium and import TPU from Germany 2.Zero backlahs 3.Both set screw and bolt we have Flexible coupling advantages : A. ISO9001:2000 B.One -piece metallic coupling C.The material of Stainless steel D.Light weight ,extremely low inertia and high response E.Zero backlash F.Different models suitale for your different demands G.OEM Service H.MOQ : 1 PC ...