Chocolate-Coating Machine Mk. 2: The Merry-Go-Round

This holiday season, [Chaz] wanted to continue his family’s tradition of enrobing a little bit of everything in dark chocolate, and built an improved, rotating chocolate-coating machine. You …

Gear Up: A 15-Minute Intro On Involute Gears

If you’re into CNC machining, mechanical tinkering, or just love a good engineering rabbit hole, you’re in for a treat. Substack’s [lcamtuf] has written a quick yet insightful 15-minute intro…

Unusual Tool Gets An Unusual Repair

In today’s value-engineered world, getting a decade of service out of a cordless tool is pretty impressive. By that point you’ve probably gotten your original investment back, and if th…

Bent Shaft Isn’t A Bad Thing For This Pericyclic Gearbox

With few exceptions, power transmission is a field where wobbling is a bad thing. We generally want everything running straight and true, with gears and wheels perfectly perpendicular to their shaf…

Tiny Orrery Is A Watchmaker’s Tour De Force

Six tiny gears, a few fancy pins, and some clever casting are what it takes to build this tiny orrery. And patience — a lot of patience, too. As model solar systems go, this one is exceptiona…

Put A Little Pigeon In Your Next Clock Project

If you’re anything like us, you’ve probably wondered why gear teeth are shaped the way they’re shaped. But we’ll go out on a limb and say you’ve never wondered why gea…

Repairing A Gear With A Candle (and Some Epoxy)

You have a broken gear you need to fix, but there’s no equivalent part available. That’s the issue [Well Done Tips] faced with a plastic gear from a lawnmower. While we’d be tempt…

Stripped Clock Wheel Gets A New Set Of Teeth, The Hard Way

If there’s one thing we’ve learned from [Chris] at Clickspring, it’s that a clockmaker will stop at nothing to make a clock not only work perfectly, but look good doing it. That i…

Clever Mechanism Powers This All-Mechanical Filament Respooler

No matter how far down the 3D printing rabbit hole we descend, chances are pretty good that most of us won’t ever need to move filament from one spool to another. But even so, you’ve go…

Radial Vector Reducer Rotates At Really Relaxed Velocity

When [Michael Rechtin] learned about Radial Vector Reducers, the underlying research math made his head spin, albeit very slowly. Realizing that it’s essentially a cycloidal drive meshed with…

Simple CNC Gear Production With Arduino

We’ve seen plenty of people 3D printing custom gears over the years, but [Mr Innovative] decided against an additive process for his bespoke component. He ended up using a simple CNC machine …