5mm-8mm Flexible Coupler

Flexible shaft coupler connecting a 5 mm shaft to an 8 mm shaft (e.g. NEMA stepper motor D-shaft to lead screw) via grub screws. Spiral-cut aluminum body absorbs minor misalignment without transmitting binding forces.

Start wiring

5 V · 12 V · Wired

Steppers

28 other options

NEMA-8 and NEMA-17-class bipolar steppers, 5V/12V geared reduction steppers (24BYJ48, 32-step 1/16), driver boards (Easy Driver V4.5, TMC260, TB6600), and shaft couplers, leadscrew and timing pulley hardware.

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28BYJ-48 Stepper Motor Module with Driver for STEM Robotics (5V, 0.9 kgf·cm) visual preview

Related groups

4 groups

DC motors

N20 micros in 1:50–1:298 ratios, 6V TT gearbox motors (120:1, 160RPM), 12V quadrature encoder gearmotors up to 45kg.cm, plus coreless micros, vibration discs, USB fans and a few outlier brushless motors.

Motors & actuators · DC & gear motors · 135 parts

Motor drivers

H-bridge breakouts from 1A to 43A (DRV8871, TB6612FNG, BTS7960), stepper drivers (A4988, TMC260, TB6600), I2C servo/solenoid controllers, and Pi/Arduino shields — sized by current and protocol.

Motors & actuators · Motor drivers · 77 parts

Pumps & valves

Solenoid valves (DN15/DN20 12V), 6V pneumatic air valves, push-pull and lock-style solenoids, 5V electromagnets (3–35kg holding force), 6V electric push rods (10–100mm stroke), peristaltic dosing pumps and submersible water pumps.

Motors & actuators · Pumps & solenoids · 41 parts

Mechanics

Robot chassis (2WD miniQ, 4WD mecanum, 6WD outdoor), mecanum wheels (48–97mm), brass hex hubs (4–6mm), shaft couplers, 2GT timing pulleys and uArm robotic arms.

Motors & actuators · Robotics & mechanics · 141 parts