In this never ending quest that tidying your workshop is, I decided that I wanted to turn a full IKEA BROR drawer (70494296) to a Gridfinity base.

UPDATE: I added spacers/corners for the large BROR drawer (00494662).

So I did the math (for the small drawer, 84x39cm) and turns out I needed a 17x8 grid, which I divided in 6 4x4 and 2 5x4 sub grids, bolted together. The grids were generated with the super useful Gridfinity generator from Perplexing Labs (https://gridfinity.perplexinglabs.com).

For the large drawer (84x54cm), you can fit a 17x12 grid. So it's 9 4x4 and 3 5x4 sub grids.

Once the grid is assembled and you put it in your soon to be magnificent drawer, you won’t need to realize that there’s a small room on each sides (for the small one: 14mm left and right, 16mm top and bottom ; for the large one: 7mm each side), because I did it already and fixed it by modding small « sur mesure » blocks to each corner and make everything snug and cozy. Nevermind the little cubes on the picture of the complete grid sitting on my bench, I replaced them with those I just talked about ¯\_(ツ)_/¯.

Anyway, I’m super happy with the result. I printed it in matte black PLA from Filalab.

So in a nutshell, you’ll need to print:

For a small 84x39cm drawer (70494296):

• 2 times Plate 1
• 6 times Plate 2
• 1 time Plate 3

For a large 84x54cm drawer (00494662):

• 3 times Plate 1
• 9 times Plate 2
• 1 time Plate 4

(if you print from the STL, don’t forget to mirror 2 spacers)

And to assemble the subgrids, I used M3x6 bolts, button or flat heads are better. You wouldn’t want to break it with tapered head bolts. And you’ll need 20 of these tiny bolts for the small drawer, and 34 for the large one if I'm not mistaken. Hope you have a micro ratchet (which I have not) because using a bit and your fingers hurts a bit.

Hope it helps, cheers!