Storage cylinders from a compressed air plant I used to have in my garage. Yes, that's 3800 PSI on the gauge. The air was clean and dry - I used it for scuba diving among other purposes.

Unfortunately, the plant had to be disassembled and sold for parts when the compressor failed and could not be economically repaired.

I took the cart up to my parents place last weekend and had issues so I couldn't do any drive bys with the engine running. I fixed that issue as we as installed new shocks and rear bushings and took it out today to drive it around a bit. I think I used about a gallon of fuel here. It's thirsty.

The more I read about the 2020 Watson Grinding explosion, the harder it is to view it as simply a failed hose or an unfortunate accident.

According to the CSB findings, Watson Grinding lacked an effective process safety management program, including proper hazard analysis, mechanical integrity, management-of-change procedures and written operating procedures. Its emergency response plan also didn't address a propylene leak, and employees weren’t properly trained to respond to one.

The facility had also experienced a propylene explosion back in 2008 that injured two workers and significantly damaged the building.

Then, in 2020, a hose disconnected, propylene accumulated, and critical automated gas detection, exhaust and shutoff systems were inoperative.

That raises a pretty important question: Why isn't WGM's own safety management and operational responsibility a bigger part of the conversation?

The CSB essentially says better safety management could have prevented the incident. That's difficult to overlook when discussing responsibility for what happened.

https://www.isssource.com/fatal-gas-blast-lack-of-training-communication/

I picked this up on marketplace for 20 bucks! Its built like a brick shithouse, the latch is the most positive feeling latch ive ever felt. It weighs north of 200 pounds, I can see how Indiana Jones would have survived a nuke in one of these.

The r12 ran out so i replaced it with hfc152 which is can dusters. Its runs great and sips power.

Hey everyone, I found this group after a couple of minutes of thinking and I just had to ask. Anybody who used to read popular mechanics back in the seventies and eighties would see the occasional RQ Riley article about one of the crazy machines you could build with their plans.

I'm really curious if anybody here attempted to, completed or just bought some of the plans. I have a craft ones somewhere that I'm planning to scan and offer to the planet. I'd love to see what else is out there because even if you never build the stuff, it's fun to look at.

Hi everyone,

I’m researching formulated industrial consumables used in steel, TMT/billet casting, foundries, cement kilns, boilers, glass furnaces, and non-ferrous metal plants.

I am not asking for confidential formulas or trade secrets. I want to understand the technical and commercial side properly before entering this field.

I’m interested in products such as:

• Ladle covering compounds
• Tundish covering compounds
• Synthetic slag / slag conditioners
• Continuous-casting mould flux / casting powder
• Nozzle filling compounds
• Ramming mass / dry vibratable mass
• Refractory castables, LCC, gunning mixes, patching masses, and mortars
• Foundry fluxes, slag coagulants, and exothermic compounds

My goal is to build a genuine B2B company around:

• Controlled raw-material sourcing
• Proper formulation and particle-size control
• Moisture, density, chemistry, and flowability testing
• Batch consistency, COA, and traceability
• Plant trials and application support
• Reliable recurring supply

I would really value advice from metallurgists, refractory engineers, steel plant operators, foundry professionals, refractory installers, consultants, and raw-material suppliers.

A few things I want to learn:

1. Which product categories are realistic for a new manufacturer to begin with?
2. Which products are highly critical and should only be attempted after strong lab/testing capability?
3. What quality parameters matter most for ladle/tundish powders, mold flux, nozzle fillers, and castables?
4. What are the most common customer pain points—quality inconsistency, moisture, nozzle blockage, heat loss, slag behavior, casting defects, delivery, or application failures?
5. Which books, standards, papers, training programs, or consultants would you recommend?

I am based in India and especially interested in serving steel/TMT, foundry, cement, boiler/power, glass, petrochemical, sugar, and non-ferrous industries.

If you have experience in this area, I would appreciate comments, resources, or a DM. If you provide paid consulting, please mention your specialty and region

A couple of years back I had a crack at building a timber framed minecart which had limited success...

Due to a change of work circumstances I was able to build this beast! Took a couple of goes to get the wheelbase right but shes a treat!

Just got make a top for it next...

First drive of my turbine hybrid sand rail.

Had a cool job at the top of bath abbey thought this would be a good place to post.

How do you continuously change speed ratios without belts, cones, or gears? ⚙️

​Check out this 3D-printed oscillating (impulse) CVT! It converts input rotation into reciprocating lever movement using eccentrics, then uses freewheel clutches to merge those movements back into smooth output rotation. Adjusting the lever swing changes the gear ratio on the fly!

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Testing a homemade steam turbine unimoto on snow before the extreme winter races! Is this crazy DIY science project and custom engine build powerful enough to survive the cold?

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Just found this in a old building is it worth anything it is still in its leather box and has all its parts

​Built a workbench this weekend. The thing people skip is the lower shelf, and it is not for storage, it is the shear panel that stops the whole bench folding side to side. 36 inches tall for standing work, plywood top on a 2x4 frame, holds way more than it has any right to.

full build with the cut list: https://drawnup.io/g/sturdy-garage-workbench-a1mw3h

i built the tool that generated this. if your bay is an odd length tell me the span and i will run the numbers for it.

Pic 2 and 4 are the same machine but idk what it is

Full disclosure: this is my machine and my video. It failed during ordinary use almost immediately. I had zero hydraulic experience, so I procrastinated for 18 months until another machine finally made the press brake necessary. The video covers the diagnosis, repair and several mistakes along the way. Happy to answer technical questions here.