Drilling of hexagonal holes

Rotary punching of a hexagonal hole

Sharpen Drill Bits by Hand - Lost Tribal Knowledge

Revealing the secret of how to drill a square hole

Melting 50 Million Tons of Iron Ore! Process of Making High Quality Wire Rods in Korea

Jet impeller on a lathe - how is this possible ???

Few people know these cunning ideas at work

Gear manufacturing. I came up with an interesting way.

Ступенчатое сверло из арматуры + лабораторные исследования

Powerful gasoline burner made with your own hands !!!

Метчик из арматуры своими руками

Drill sharpening. The main thing when sharpening a drill.

Three Ideas for a lathe that will be appreciated! You can't buy this tool in a store.

4 The most important tool for your lathe.A prototype that many mechanics imitate

HUGE Magnet VS Copper Sphere - Defying Gravity- Will a Neodymium Magnet Float Inside?

Extreme Dangerous Fastest Big Chainsaw Cutting Tree Machines | Monster Stump Removal Excavator #30

Making a very useful tool for a mini lathe

Rare Antique Fractal Vise [Restoration]

Mixing Molten Metals Together - Cast Iron Casting - Copper - Bronze - ASMR Metal Melting - BigStackD

I made a precision gearbox - with NO GEARS.