Upgrades to the Carriage itself

Now onto a scarier upgrade.
This is the bottom of the main carriage.

Carriage and stock for making upgrades
Sieg Sc3 Carriage

The two black strips that you can see screwed to the underneath of the carriage are hardened steel and they stop the carriage from lifting. As you can imagine the needs to be a bit of clearance between these strips and the underside of the carriage to allow it to slide along the bed of the lathe. As delivered this clearance is adjusted and fine tuned by the set screws and locking nuts that you can see between the cap screws. As I understand it these lead to cracking of the hardened plates over time.

I have seen a few ways to over come this but the best way that I have seen is to remove these grub screws and replace them with an appropriate thickness of brass shims. The person I saw who added shims just had lots of bits of shim balanced in between the two surfaces but a Gent in the US improved upon that by making a jig to drill out the shims to match the hole spacing of the main cap screws thus preventing them from being dislodged while being refitted to the lathe.

Next is to replace the cap screws with stainless studs and nyloc nuts and then remove one of the hardened strips and replacing it with a mild steel strip of more substantial proportions.

Carriage and stock for making upgrades

There are a couple more bit’s of material that I am waiting for so the rest of the description will have to wait until then.

But in the meantime, the next job is to mill out the carriage where the blue blocks are to take the two pieces of square stock in the image these will be screwed to the ends of the carriage in the milled gaps and will form the anchors for the carriage stop.