The Home Machinist!

ctwo wrote: ↑Sat Jun 02, 2018 9:03 pm

John Hasler wrote: ↑Sat Jun 02, 2018 7:26 pm Done right injection-molded plastic vials could be extremely sensitive and accurate.

This is a glass ground vial. I will not assume it is very linear nor true in a rotational axis.

Yes, I understand. I was making a tangential comment on the subject of injection-molded plastic vials.

Done right injection-molded plastic vials could be extremely sensitive and accurate.

Your pump is at the bottom of your well. Extremely hard water may increase the frequency of kidney stones in people who are at risk of developing them for other reasons.

Mauro writes:
My favored hack is a piece of springy worn out hack saw blade held in the tool post to ride
against the rough surface, gear teeth, thread, knurls, whatever you have and place
the indicator on the blade. Leverage may even increase the resolution.

I like that idea.

> We've lived on hills all our lives, and never been damaged by "natural" disasters.

Tornados.

I see no reason why the rings wouldn't provide a smooth, concentric surface to indicate on.

Is there an unbent section of the shaft near the base that you could indicate on?

Find a cast iron carburetor.

Guessing from the OP's name I think he has a metric lathe and is working in metric.

The alcohol from the gas pump is ethanol. Dry gas is methanol or isopropyl alcohol. All of those are hygroscopic and readily absorb water into the mix (though some people say ethanol more readily breaks down and releases that water?). Personally... I would side-step and say leaving ethanol-gas in t...

Keep the tank full.

choprboy writes: The lathe could also have a metric lead screw (since is seems to be a Chinese primary market lathe) to ease metric threading operations, which would cause a mis-match when performing English threads. When using an English lead screw to make metric threads (or vice versa a metric lea...

Harold writes:
Tight tolerance, in and of itself, won't be cause for an assembly to not function.

But it may be cause for it to not be manufactured.