Is Copper Magnetic? The Trust Is…
If you hold a magnet up to a copper pipe, nothing happens. It doesn’t stick. If you drop that same magnet through the copper pipe, something magical happens: It floats down in slow motion. So, is copper magnetic? The short answer is: No. The engineering answer is: It’s Diamagnetic, and that’s even more useful. Understanding […]
What Does TIG Mean? The Ultimate Procurement Guide to GTAW
The acronym is simple: TIG stands for Tungsten Inert Gas. The formal engineering term used in AWS D1.1 and ISO standards is GTAW (Gas Tungsten Arc Welding). But if you ask me, or any of the senior welders on my shop floor at RapidManufacturing, TIG stands for something else: “Time Is Gold.” Why? Because TIG […]
304 vs 316 Steel: Which better for your project?
In the world of custom manufacturing—specifically within CNC machining and sheet metal fabrication—few things burn money faster than the debate between AISI 304 and AISI 316 stainless steel. At Rapid Manufacturing, I see it all the time in BOM audits: engineering teams, scared of a potential failure, just default to 316 for the entire assembly. […]
What Is Baltic Birch Plywood? An Engineer’s Guide to Its 5 Special Traits
The Quick Answer: What is special about Baltic Birch Plywood? What makes Baltic Birch plywood special is its unique construction: it is made entirely from thin, uniform birch veneers, resulting in a void-free core with a high ply count (e.g., 13 plies in 3/4″ material). This gives it superior stability, exceptional screw-holding strength, and […]
TPR Material Disadvantages: What to Use Instead
In my 15 years at Rapid Manufacturing, overseeing thousands of injection molding cycles and analyzing countless failed prototypes, I have seen one material cause more heartbreak than any other: TPR (Thermoplastic Rubber). Marketing teams love it because it’s cheap and feels soft. But as an engineer, I see it differently. I see a material that […]
18/8 vs 316 vs 304 Stainless Steel: An Engineer Decodes the Difference
The Quick Answer: 18/8 vs. 304 vs. 316 18/8 and 304 are the same thing. “18/8” refers to the composition of 18% chromium and 8% nickel, which is the official definition for 304 grade stainless steel. “18/8” is a consumer or marketing term, while “304” is the engineering and industry grade. 316 stainless steel […]
What is Aluminum? An Engineer’s Guide to the Metal That Changed the World
The Quick Answer: What is Aluminum? Aluminum (spelled Aluminium outside North America) is a chemical element with the symbol Al and atomic number 13. It is a lightweight, silvery-white, and highly versatile metal. It is not found pure in nature but is extracted from its primary ore, bauxite. Its most remarkable properties are its […]
What is a Heat Sink? An Engineer’s Guide to Thermal Management
Quick Answer: What is a Heat Sink? In engineering and electronics, a heat sink is a passive heat exchanger designed to dissipate unwanted heat from a heat-generating component (like a computer CPU or an LED) into a surrounding fluid medium, usually air or a liquid coolant. It accomplishes this by using a material with high […]
Imperial vs. Metric: An Engineer Explains the 3 Key Differences
I’ll never forget the day a single character on a blueprint cost us nearly $10,000. The drawing came from a new client, and it called for a series of precision-drilled holes in a large aluminum plate. The note specified a diameter of “1/4”. A young machinist on my team, trained almost exclusively on the metric […]
An Engineer’s Guide to Stiffness: How to Calculate It
What’s the difference between a pool noodle and a steel bar? It’s an obvious question, but the answer is the key to understanding one of the most critical concepts in all of engineering: stiffness. One bends under its own weight, while the other can support a building. This property, this resistance to being bent or […]
