Climax Metal 2C-100-KW Two-Piece Clamping Collar, With Keyway, Black Oxide Plating, Steel, 1" Bore, 1-3/4" OD, 1/2" Width: Clamp On Shaft Collars: Amazon.com: Industrial & Scientific
Hillman 1/8 I.D. x 3/8 O.D. Shaft Collar (10-Pack) 883551 - The Home Depot
Amazon.com: MECCANIXITY Shaft Collar 1.57 Inch Bore Single Split Aluminum Clamping Collar Shaft Collars with Set Screw Silver Tone : Industrial & Scientific