Do You Use?
One of the most frequently asked questions I receive is about the drills I use for drilling holes in my gourd lamps.
It is thanks to the precisely drilled holes, my lamps create beautiful light patterns on the walls. In some of the bigger lamps like Nepenthis there are nearly 30 thousand holes. Taking into account the number of the drills and the fact that they must be drilled exactly in the direction of the light source, it is very important to work with high quality, easily replacable drills.
The Most Important?
I my lamps I drill holes of 21 different diameters. Unfortunately we can’t find one brand which provides drills in the whole spectrum of diameters. Therefore, I use a few different types of drills.
For me, the most important parameter is the constant shank diameter, which in case of the standard drills changes along with the diameter of the drill itself.
Thanks to the constant shank diameter we can use just one type of the collet with all the drills which makes changing the drills more efficient. With several thousand holes to drill, it does matter.
In practice, just two types of collets are used with all my drills.
Where To Buy?
Ø 0,5 to 2,3 mm
Ø 2,4 / 2,8 / 3,2 mm
Dremel 628 drills for metal. Shank: variable.
They are sold in sets, but because of the variable diameter of the shank, I use only the ones I need.
We can use 2,4 mm drill with the same collet as in the case of 2,35 mm. With 2,8 and 3,2 we need a bigger collet.
Ø 3 / 4 / 5 / 6mm
Dremel 636 drills for wood.. Shank Ø 3,2mm.
The only typical wood drills with centering point that I use.
Unfortunately, I noticed that now their shank is slightly different and worse than it used to be and thus sometimes it is difficult to fix the drill so that it is perfectly centered.
WHAT ELSE YOU SHOULD
Keep In Mind
In practice, I rarely drill holes smaller than 1 mm. Most often, I try to make the smallest ones with the diameter of 1,2 mm. Holes smaller than 1 mm do not cast the light well enough. And the smaller the hole diameter, the more precise drilling has to be.
The shanks of most of my drills are shortened so that they can be mounted deeper. It affects the precision of drilling as well.
Precise drilling with drills for metal requires considerable skills and practice because the drill can slide over the gourd’s surface. For me, placing holes exactly where I want is extremely important. Therefore, I always mark the exact location of each hole. Puncturing this place is enough. You do not need to draw auxiliary squares as you can see in the picture.
You should pay attention to the fact that the rotary tool should be placed high enough. Then, the flexible shaft does not tire your hands so quickly. This advice is primarily for beginners. I additionally attach the rotary tool to ensure it does not swing while hanging because it can also be disturbing.
These are the drills that I use and which have proved to be the most useful for me in making gourd lamps over the years. Of course, there are a lot of similar drills in the market, but I hope that my advice will be helpful, especially for those who are starting their adventure with the gourd.