Make: Robotic Arms

73Chapter 4: More Links, More Precision

STEP 11

To bolt on the next link, you’ll need many of

the same components we used in the previous

step, minus the 3 mm spacer. We’re going to

need two 8 mm bearings, one M3 Х 20 mm bolt,

and one M3 locknut (Figure

4-13

).

This link will be assembled just like its counterpart,

with a bearing placed in both links being connected

and your bolt going through both bearings and

finished off with a locknut (Figure

4-14

).

STEP 12

For our last step, we’ll need a duplicate copy of

the components from the previous step: two 8

mm bearings, one M3 Х 20 mm bolt, and one M3

locknut (Figure

4-13

).

In this final step, all we ...