1-1/2" Bore; Shaft Collar; Steel; 2-1/4" Outside Diameter; 13/16" Width; One Set Screw; 3/8-16 X 3/8 Set Screw Size; One Piece Solid

1-1/4" Bore; Shaft Collar; Stainless Steel; 2-1/16" Outside Diameter; 1/2" Width; 1/4-28 X 11/16 Clamp Screw Size; Two Piece Split

3/4" Bore; Shaft Collar; Aluminum; 1-1/4" Outside Diameter; 9/16" Width; One Set Screw; 5/16-18 X 1/4 Set Screw Size; One Piece Solid

1/2" Bore; Shaft Collar; Stainless Steel; 1-1/4" Outside Diameter; 3/8" Width; 8-32 X 1/2 Clamp Screw Size; Two Piece Split Recessed Screw

1" Bore; Shaft Collar; Aluminum; 1-3/4" Outside Diameter; 1-1/16" Width; 1/4-28 X 5/8 Clamp Screw Size; Two Piece Split