1/4 inch to 3/8 inch Stainless Steel Set Screw Shaft Coupler

uxcell GA/GB 37mm diameter DC Geared Motor Mounting Bracket Holder 6mm Hex Coupling

1/4 inch to 6mm Stainless Steel Set Screw Shaft Coupler

Pololu 1083 Universal Aluminum MOUNTING HUB for 6mm Shaft Pair, 4-40 Holes

Greartisan DC 12V 200RPM Gear Motor High Torque Electric Micro Speed Reduction Geared Motor Centric Output Shaft 37mm Diameter Gearbox

SummitLink 415 Pcs Black Assorted Heat Shrink Tube 10 Sizes Tubing Wrap Sleeve Set Combo

1/4 inch to 1/4 inch Stainless Steel Set Screw Shaft Coupler

1/4 inch to 5/16 inch Stainless Steel Set Screw Shaft Coupler

3/8" Ball Bearing Quad Pillow Block

3/8 inch to 3/8 inch Stainless Steel Set Screw Shaft Coupler