Copper Coupling 4mm - 2 pcs.

Pololu Universal Aluminum Mounting Hub for 4mm Shaft, M3 Holes (2-Pack)

Pololu Universal Aluminum Mounting Hub for 3mm Shaft Pair, 2-56 Holes

This two-part aluminum assembly mounts directly to 5 mm diameter motor output shafts like those on many of our stepper motors and allows you to drive most scooter, skateboard, inline skate, and other common wheels that are compatible with popular 608 ball bearings.

A set of adapters (adapter) from the motor shaft 6 mm to 12 mm, wheel holders from RC models. Pololu 2687

These 20 mm long aluminum adapters convert a 6 mm diameter shaft to a 12 mm hex shaft that is compatible with many common hobby RC wheels. Pololu 2686

Pololu Universal Aluminum Mounting Hub for 5mm Shaft Pair

A set of adapters (adapter) from the popular 4 mm to 12 mm motor shaft, wheel holders from RC models. Pololu 2684

Solarbotics GMW (GM2/3/8/9 Gear Motor Mount - ONE mount)

Flexible shaft coupling with a diameter of 8 mm and 10 mm. It is made of aluminum, has a diameter of 25 mm and a length of 30 mm

Adapter that allows you to easily mount the wheels on a motor with a shaft diameter of 3 mm using screws size 4-40. The hub fits both round and D-shaped shafts. Pololu 1078

Adapter that allows you to easily mount the wheels on a motor with a shaft diameter of 4 mm using screws size 4-40. The hub fits both round and D-shaped shafts. Pololu 1081

Pololu Universal Aluminum Mounting Hub for 5mm Shaft, M3 Holes (2-Pack)

Pololu Universal Aluminum Mounting Hub for 1/4â€l Shaft, M3 Holes (2-Pack)

Copper alloy traveling nut intended for use with Tr8×8(P2) threaded rods and features a mounting flange with four holes threaded for M3 screws. Pololu 2688

Pololu 2675

This two-part aluminum assembly mounts directly to 6 mm diameter motor output shafts like those on our 37D mm gearmotors and allows you to drive most scooter, skateboard, inline skate, and other common wheels that are compatible with popular 608 ball bearings.