Climax Metals M2C-28 Black Oxide Plated Steel Two-Piece Clamping Collar, Metric, 28mm Bore Size, 48mm Outside Diameter, M6 x 16mm Set Screw: Tools Products: Amazon.com: Industrial & Scientific
MAEDLER deep groove ball bearing single row inner diameter 15mm outer diameter 28mm width 7mm shielded on both sides SKU: 61902-ZZ-MAE - Maedler North America
Output shaft both-sided for worm gear unit H/I size 75 diameter 28mm overall length 244mm SKU: 42207502 - Maedler North America
6001-8-2RS Sealed 1/2"x28x8 Ball Bearing Half inch Bore : 28mm OD Outer Diameter | eBay