I Bought a DEWALT DCG405N Angle Grinder for $144… and the Motor Costs $188

In this episode, I take a closer look at the brand-new DeWALT DCG405N / DCG405 18V XR angle grinder. This is a popular brushless model sold as a bare tool, without a battery or charger, but with a TSTAK transport case included. I check my first impressions, build quality, weight with different batteries, real RPM, and how the grinder behaves during a short no-load test. There is also an interesting moment — the tool runs very loudly and gets quite hot, so I compare it with a second unit. Then I disassemble the DeWALT DCG405N and show what it looks like inside: the electronics, brushless motor controller, dust protection, stator, rotor, bearings, gearbox, grease, and spindle. At the end, I check the prices of spare parts, and this is where things get really interesting — the motor/controller module alone costs around $188. If you are interested in power tool tests, teardowns, repairs, spare part prices, and honest tool reviews before buying, subscribe to the Akademia Narzędzi channel. 00:00 — Intro and DeWALT DCG405N Overview A look at the 18V angle grinder, NT version — bare tool without battery and charger. 01:20 — Specs and First Impressions Brushless motor, brake, 18V, 125 mm disc, M14 thread, and claimed 9000 RPM. 04:30 — Quick-Release Nut and Disc Mounting System An interesting DeWALT solution — the disc can be tightened by hand or with an Allen key. 06:00 — Weight and RPM Test Checking the grinder’s weight with different batteries and testing the real RPM with a lightweight test disc. 07:10 — The Grinder Runs Strangely Loud First surprise: the brand-new tool is quite noisy, and the second unit is even louder. 08:15 — Strong Heating Without Load After a short no-load run, the tool gets hot, which raises some concerns and leads to further inspection. 17:46 — Spare Part Prices: Shocking After disassembly and checking the parts diagram, it turns out that the parts are very expensive, and the motor module costs around $188.