1/4" inch Bore Miniature Small Pillow Block Mounted Ball Bearing 0.250 Inner Diameter MUP4

1/4" inch Flanged Miniature Small Pillow Block Mounted Bearings MFL4 Bore 0.250 inch Inner Diameter

uxcell 37mm 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

Ruland SC-4-F Set Screw Shaft Collar, Black Oxide Steel, .250" Bore, 1/2" OD, 9/32" Width (Pack of 4)

Thomson QS 1/4 L 18, Quick Shaft, 0.2490 / 0.2495 in Diameter, Class L, Carbon Steel, 60 Rockwell C Min., 18 in long

Arduino Uno R3 Microcontroller A000066

Eowpower 4Pcs 8mm Bore Diameter Ball Mounted Pillow Block Insert Bearing

Nema 17 Stepper Motor Bipolar 2A 59Ncm(84oz.in) 48mm Body 4-lead W/ 1m Cable and Connector for 3D Printer/CNC