The final assembly

We now can proceed to complete the assembly of the 4th axis (again, note, that I don’t need the tail stock, but if you need it because you have a very long cylinder to machine, you should build it in exactly the same way we did the main component).

We start first by mounting the pulleys on the motor and the chuck shaft. We also need to install the 8 mm collar on the chuck’s shaft, between the plates. Do not tighten the grub screws on the collar just yet. As an option, if you have enough shaft clearance, you can put a collar on either side of the plate to hold the chuck securely against the bearing, even though you have glued it into the bearing’s bore. Here’s how the 60-tooth pulley and collar fit on the chuck. This is just for illustration; you will need to assemble this element with the plates in place.

Figure 9.15 – The chuck and pulley assembly (without the front and rear plates)

Next, secure...