G'day everyone,

First half of the video involves me flushing and replacing the oil for the headstock gearbox. It wasn't going to feature in this video, it was going to make up the beginning/flashback of a video if/when I tear the gearbox apart.

As it turns out though, by chance I had some different oil that I recently picked up for a different gearbox, and I decided to see what the thicker viscosity would do to the noise of the gearbox. I was told to use ISO 68 oil, the SAE 30 stuff is thicker, and as it seems, it does wonders for the gearbox noise.

The second half of the video was the project that I had planned. Changing the gearbox oil would have been a quick 5 minute video, and not hugely entertaining by itself, so I decided to combine the two into one video.

I need a quick DRO for the tailstock. I need to quickly set the origin for counterboring with an annular cutter and I will be doing this close to 100 times. I don't have the space for a carriage stop, so a DRO is the next best option.

A perfectly good solution can be fashioned from a cheap set of digital calipers, it just needs a bit of modifying first. I did this several years ago on the mini lathe. This design replicated it, but with a few improvements.

I hope you enjoy the video.

Timestamps
0:00 Fixing The Gearbox For Now
7:53 Adding A Tailstock DRO