How to couple a robot's wheel with motor ?

COUPLING MOTORS AND WHEELS

When you have motors and wheels the question arises how do I couple them ?.As far as I've experienced they never fit together .So you have to make a coupler to couple both so that it can be removed and used later in any other robot and for easy dismantling .I've written the steps for fabricating it elaborately .You can use either ms(Mild steel ) or Brass for fabricating it .

STEPS OF FABRICATION

• First measure the diameter of the motor shaft.
• Then measure the internal diameter of the axis the wheel.
• If both match then you can fix it directly.
• Otherwise choose a rod that is at least 4 mm greater in diameter than the motor shaft.(so that you can use a miimum size of 2mm screw to secure it)
• Step turn one side of the rod slightly larger than the internal diameter of the axis of wheel to give a tight fit.
• Then on the other side drill a hole with a drill bit that is little larger than diameter of the motor shaft in the rod along its axis .This side is given a loose fit since motor can be reused .(Note this is a drill to insert the motor)
• Drill until a depth that is little shorter than the height of the motor shaft.
• Then grind the motor shaft with grinding machine to make a flat surface along the axis if your motors shaft is cylindrical. Some motors shaft will be like half cylindrical .This step is not needed if the motor is of this type.
• Then drill a hole perpendicular to the axis of the coupling shaft matching the place where you ground the motors shaft, then tap the hole to form thread and use a bolt to tightly secure the coupling shaft with motor.
• Before doing the above step don’t forget to fix the wheel.

Wheels fitted to the motors with the coupler .