Arduino R/C Lawnmower (painted)

Step 3 The Wheels

First you need to mount the drive sprockets to the wheels.

The EASY way:
If you are smart and have more money, you can find a set of wheelchair motors that have the wheels mounted to them.

The CHEAP way:
I could not find any in my price range, so I went with just the motors, then bought wheels, then sprockets. Believing it would not be strong enough to mount the wheels directly to the motors, I opted to mount the drive wheels on an axle, then the motors to the frame, and use chain to transmit the power. A picture is worth 1000 words, so look at them carefully.

Mount the sprockets to the wheels:

I had to place the sprocket on the center of the wheel and drill 3 holes through the sprocket and then through the wheel itself. Once the sprocket is lined up and properly centered, I placed the 3 bolts through the sprocket and wheel and tightened them up as much as possible. I then welded the sprocket to the wheel hub to keep it centered.

The wheels from Harbor Freight Tools have built in bearings for a 5/8" shaft, hence the 5/8" threaded-rod we are going to use as an axle.

Repeat this process for both wheels.

There is more detailed info tagged in the pictures.