I quickly calculate proper tap-drill diameters using this simple formula. Tap-drill diameter equals nominal diameter minus thread pitch. For example, drill size for a 3/8-16 thread is 0.375 0.0625 ...

i need one of those charts where you slide the card back and forth until the screw size you want is in a certain window, and then the rest of the windows have pertinent info in them, like ...

Correct tap drill sizes can be selected by following charts or by this formula: Tap drill size. Major (outside or O.D.) diameter of the thread minus 6 (.75 x 1.299) ...

Luckily, your 3D printer takes care of almost all these steps. By simply designing your holes to be the tap drill size you can hand tap fairly strong threads in your 3D printed parts.

Each tap drill is engraved with a label, which is convenient for you to choose the size that suits you. The convenient ¼-inch (6.35mm) hex shank has a tapered end to prevent excessive knocks.

The drill ‘worm’ measures as little as 5.3 inches (13.5 cm) in diameter and is 9 feet (2.8 meters) long. This compact drill head can rapidly and quietly bore through the ground in relatively ...

Luckily, your 3D printer takes care of almost all these steps. By simply designing your holes to be the tap drill size you can hand tap fairly strong threads in your 3D printed parts.