When I was researching, I found many videos and forums saying that pumps use a lot of oil, so when I bought mine, I purchased a quart. Since I started, the pumps seen over 100 hours and the level in the sir glass still reads full

It is funny but it's also not a problem. Not for pressure higher on the inside. But no worries for the higher pressure on the outside. The cylinder is the strongest shape in cross section.

@@GradyGillis um, this drawing a vacuum so the pressure is higher on the outside...but all it would do is implode so not much chance of harm.

@@jacknemo8021 No kidding. You obviously didn't read what I said. Did you miss the part about the cylinder being the strongest shape in cross section? That's why the arch is such a long lasting shape in construction. Higher pressure on the outside works in the direction of it's strength. The chances of implosion, using that vacuum pump, are nil. The ends will fail, first. The pressure warning on the pipe is for using it in a situation where it has a higher inside pressure. So, um, there is no problem. And if you think an implosion is not a problem, you understand zero about the energy involved. An implosion can be just as dangerous as an explosion. Both involve rapid releases of energy, the only difference being the initial direction of the energy release.

@@GradyGillis um, I'm a materials scientist so....yes I understand. You said it backwards. Also, an implosion of a container that size at say 2 atmospheres is like crushing a beer can in your hand. Negligible. You're excitable and poorly educated, so I'm going to stop reading/ responding to you. Bye Felicia.

PVC works great. The cactus juice changing can be due to moisture in the timber, excessive temperature, or other contaminations in the juice.

I haven’t tried Cactus Juice in a mason jar, but Curtis might be right. Glass is melted and cooled sand (silicon dioxide), but a variety of other chemicals are typically added to the sand to make it melt more easily, form more smoothly, to color it, and for other purposes. One of those additives might be doing something to the resin. I wonder what would happen if you use a Pyrex laboratory beaker.

Its not meant to pressurize the inside, but the round pipe is plenty strong to withstand the pressure differential from pulling a vaccum inside.

@@vandelftcrafts2958 i assumed this guy would know what he is doing but just found it a funny shot. Does "not for pressure" only mean high pressure on inside? i assumed it would be for vaccum pressure as well.

@@bizarro20daves well it's not designed to become a vacuum chamber... but the "not for pressure" only applies to not for use as a pipe for pressurized systems like tap water. It's meant for example for waste water that only uses hydrostatic pressure to transport the liquid.

As someone that does lots of stabalizing and sells blocks.. max or close to max tint load is necessary for those amazing deep colours aka 4oz of CJ dye per gallon. Also multi week vacuum and pressure cycles are required if you want 100% saturation. Blocks should stay submerged without any weight prior to curing them.

You can do that on a table saw... Very carefully... It does require a hole in piece to do that though...

If you have a router, it will cut the grooves. As Walter said, take small bites and keep moving around the circle, so you don’t melt the material. I don’t remember if there are special router bits for use on plastic, but I would definitely look into that if I were taking that path. You could also use hand tools, such as carving gouges, but that takes more time and more hand skill. But here’s a secret: It’s nice to have grooves to make everything fit better, but if necessary, you can get along without grooves on the top and bottom. All you really have to have are sealing gaskets. For the top, either make a gasket from silicone caulk, as Walter does, or get a sheet of rubber gasket material (plumbing suppliers sell them) and cut it to the outside diameter of your chamber or a little bigger. When the pump is running, the vacuum will hold everything together. As for the bottom, if you cut the PVC pipe reasonably straight and square, you can just cement it to the bottom with the aforementioned silicone caulk. This will both hold the pieces together and make an airtight seal. This is how aquariums are built- nothing but silicone cement holds the big, heavy panes of glass together, with enough strength that the tank can hold (in large aquariums) hundreds of gallons of water without leaks. Hmm, maybe I’ll make my own “how to” video.

Same way as bigger ones, honestly...

Really if you’re not comfortable using your forge for smaller blades just use a torch. MAPP torches burn hotter than propane but either will do really as long as you can get it to the proper temps.

Look up KnifeSteelNerds. He's A metallurgical engineer and had some good info. Particularly A video out today testing a multitude of steels in a give rather than heart treat oven

@@That0neDeadGuy MAPP gas does burn hotter than propane, but propane burns hot enough to heat-treat knife steel. You said that, but I want to be sure nobody misses that point.

Yep as long as it holds vacuum it will work

Mine were made using the transparent blue pvc with pvc plate glued into the bottom with pvc cement. No problems at all

You can use anything that isn’t air-permeable for the base. Just glue that sucker on with the silicone cement. Walter just felt like playing with his fancy CNC mill. As others have noted in the comments, you can also get a metal pot from a thrift store. The pot has a built-in bottom, so you won’t need a separate base piece. If you can find one, an asparagus steamer is often recommended for its shape- tall and not very wide.

That depends, I'm in Canada and the PVC endcsps I used did not hold up to the cactus juice and turned Into mush. The pipe itself was fine. Cactus juice also eats acrylic over time. I've had 2 acrylic lid failures on larger chambers,it makes a huge mess when an implosion happens.

Top end wasn't glued on, he just made seal let it cure and then used it loose

yes. though not all dyes impregnate deep into wood. likewise not all woods soak up the dye fully even if the dye is designed to go deep. you can usually find detailed information in product instructions on dyes for stabilizing resins. as for how well a particular piece of wood takes a dye you just gotta do some testing.

@@WUNDER8AR thanks

The top silicon is used to make a 'gasket' (not join the lid to the body).

It’s only cheap if you already have all the tools. But really, you can skip the computerized machining. Instead of routing out grooves in the parts, you can just slap ‘em together with silicone cement. For the top, if you have a silicone or rubber gasket (which you can easily make), the vacuum pressure alone will hold the cover on. You can also drill simple holes and silicone-cement the plumbing fittings in place, if you want, instead of tapping threads.

Yea I was concerned about this at first too... I'm thinking this is probably ok as it's an internal vacuum rather than internal pressure. With a vacuum the external pressure will be pushing the cylinder in from all sides and being resisted by the pipe material trying to contract into itself, particularly given the small size of this pipe. It's probably rated for moving sewage and drainage, not as a high pressure water line, which would be internal pressure. Internal pressure would make the tensile strength of the material much more of a problem as the pipe would not be able to support and resists its own expansion.

@@wesplybon9510 I just found it funny i'm sure its fine

Reminds me of Futurama: Good Lord! That's over 5000 atmospheres of pressure! How many atmospheres can the ship withstand? Well, it was built for space travel, so anywhere between zero and one.

I have 2! No, hang on, I want one too!

Almost totally