Why Choosing Between Titanium and Tungsten is a Million-Dollar Decision
“Clive, which one is better?” The young engineer was holding two metal rings, one in each palm. One had the familiar, slightly dark luster of titanium. The other had the brilliant, almost liquid-silver polish of tungsten carbide. He was about to get married, and he’d fallen down the rabbit hole of material science that is […]
What’s the Difference Between Taper, Plug & Bottom Taps?
I’ve been an engineer in the rapid manufacturing (RM) space for over two decades, and if there’s one thing I know, it’s that success often hinges on the smallest details. One of those details, a frequent source of immense frustration for apprentices and even seasoned machinists, is the humble threaded hole. Specifically, the blind threaded […]
Fix Failed Prints: An Engineer’s Guide to HIPS vs. PVA Supports
I have a graveyard on my desk. It’s not a real graveyard, of course. It’s a collection of plastic failures. A beautiful, intricate lattice cube where the internal support structures fused to the model, turning it into a solid, useless block. A turbine impeller with delicate, curved blades, half of which snapped off during a […]
Stop Product Failures: An Engineer’s Guide to the 4 Types of Silicone
e use “silicone” as a catch-all, but that’s like calling everything with four wheels a “car.” A Formula 1 race car and a sixteen-wheeler cargo truck are both “cars,” but you would never use one to do the other’s job. So it is with silicone. The gummy sealant you use to caulk your bathtub shares […]
Stop Ruining Parts: An Engineer’s Guide to Laser Marking, Engraving & Etching
Process Mechanism Surface Interaction Typical Depth Laser Marking Annealing: A chemical change below the surface. Leaves the surface perfectly smooth and intact. Effectively zero (sub-surface effect). Laser Etching Melting & Expanding: High-power laser melts the surface, which expands and roughens. Creates a raised, textured feel. 10-25 microns (0.0004″-0.001″). Laser Engraving Vaporizing: High-power laser physically removes (vaporizes) material. Creates […]
Stop Snagging & Failures: An Engineer’s Guide to Countersink Holes
I once watched a multi-million dollar medical device fail its final validation test because of a single screw. It was a beautiful piece of equipment, a cart-based diagnostic tool with a sleek, user-friendly shell made from high-grade ABS plastic. During one of the final user tests, a nurse snagged the sleeve of her scrubs on […]
Stop Rust & Pitting: An Engineer’s Guide to 18/10, 18/8 & 18/0 Steel
It’s one of the most common questions I get, and it comes from everywhere—from startup founders designing a new piece of kitchenware to plant managers trying to figure out why a new stainless steel tank is showing rust spots after a month. They all point to a number stamped on the metal, a code like […]
Stop Print Failures: An Engineer’s Guide to DMLS vs. SLM
Feature DMLS (Direct Metal Laser Sintering) SLM (Selective Laser Melting) Core Mechanism Sintering: Laser heats powder to the point where particle surfaces fuse. Melting: Laser fully melts the powder into a liquid that solidifies. Material Compatibility Best for alloys with a wide melting range (Inconel, Tool Steels). Best for pure metals or alloys with a single melting […]
Why Standard Gears Fail: A Guide to the Industries That Depend on Custom Gearing
For over 25 years, I’ve been a partner at RM, a factory that solves mechanical problems. Day in and day out, clients bring us their ambitions, their challenges, and, quite often, their expensive failures. And in a surprising number of those cases, the root of the problem is a single, deceptively simple component: the gear. […]
Fix Bad Holes: to Using a Reamer Correctly
Quick Answer: What is a Reamer? A reamer is a precision rotary cutting tool used to enlarge a previously drilled, bored, or cored hole to an exact size while leaving a smooth, clean internal finish. Unlike a drill bit, which is a roughing tool, a reamer is a finishing tool. It removes only a small […]
