10 mm Round 4 mm Key to 1/2 in. Round with 1/8 in. Key Shaft Adapter - AndyMark, Inc
260mm Bore H 2352 Bearing Bushing Adapter Lock Sleeve H2352 for Metric Shaft _ - AliExpress Mobile
SKF HE 209 Adapter Sleeve, 1-1/2" Shaft Size, Used With 6200K Series Ball Bearings and 20200K Series Roller Bearings: Bushed Bearings: Amazon.com: Industrial & Scientific