The Home Machinist!

I don't have an inductotherm, which is the problem. I am trying to find one for use in the instructional shop.

What was in the electrolyte?

Something you might try is turning some stock between centers. That takes the chuck out of the equation and lets you start to tweak other factors, like the tool/toolholder/toolpost, or the various carriage slides.

Harold, I'm involved with an instructional shop in Portland that is currently getting set up. It goes by the acronym VIAS, for Village Industrial Arts Studio. We have some classes going like woodworking, patternmaking, machining and 3D printing. We will be adding some blacksmith and foundry courses....

Harold, do you still have your inductotherm furnace and have you hooked it up?

Jim

You're going to find that the deflection of the workpiece at the cut is going to be determined by the spindle diameter and the workpiece overhang. With the same diameter spindle and a greater overhang due to length of chuck, you will get more deflection and more chatter. A second issue is that the m...

Well, acetic acid with an extra kick.

The way to neutralize EDTA is to mix it with dilute acetic acid.

EDTA was used at room temperature. I'm not sure how long it would take for an immersed part, but expect that time will depend on thickness. On lightly plated surfaces during decontamination, the plating would start to come off within a few minutes. This was when the surface was sprayed with the EDTA...

Use EDTA (Ethylenediaminetetraacetic acid). This is a chelating chemical that removes chrome. It is medically used for chelation therapy to treat heavy metal poisoning. It is also used in some food products and also is a common additive in laundry detergent. While working in the nuclear industry, we...

I have used Sparex #2, which is mainly sodium bisulphate with very good results. Followed by a clear water rinse, I usually don't have to brush or scrub. I usually use EZFlow solder with sta-silv flux or boric acid, I get good flow and wicking of the solder.

I've seen some handles that float on a pin sticking out from the handwheel. The pin hhad a groove in it and a spring clip floated in the groove. The handle compressed the spring clip but floated over the pin. It makes a nice handle.

Bill, I agree that there are a lot of factors that go into relief valve performance. I worked in the design group for Navy nuclear reactor plant relief valves and the modelling to get desired performance is pretty complicated. Probably why relief valves are certified and tested. It helps keep from h...