Spur gear lifting

The figure shows the unit that used in this part and its components. It consists of:

1. Base plate
2. Shaft
3. spacer
4. Shim
5. Spur gear (T = 84 teeth)
6. Spur gear (T = 28 teeth)
7. Driving pin
8. Weights:

2 x 0.25 N

            1 x 0.5 N

            2 x 1 N

            2 x 2 N

            1 x 2.5 N

1. Weight holder
2. Rope with eye
3. Pulley
4. Knurled nut