Harbor Freight US General mini toolbox Quinn Master Set socket tray

This is a tray designed for Harbor Freight's US General mini toolbox. It fits in the uppermost compartment, under the lid. It is designed for the Quinn ¼" Master Socket Set. The tray holds only the sockets and ratchet. The 3" and 6" extensions, universal joint, hex bit holder, hex bit handle do not fit in the tray. These items should be placed in one of the toolbox's drawers.

The tray will accommodate the Quinn off the shelf 72 tooth ratchet. It will also accommodate the Quinn off the shelf 90 tooth ratchet with the soft grip removed. I removed the soft grip hoping it was the same 90 tooth ratchet in the master set. It isn't. The Pittsburgh Pro ¼" sockets and ratchet will fit also.

The overall dimensions of the tray is 273 mm x 145 mm. To print it in one piece a larger print bed will be required. Use the Quinn Master Set socket tray v3.stl to do this. This is meant to be one color.

For smaller print beds I have broken the tray down to 4 parts. These parts are best if you want to add pauses to change filament to color the lettering.

• The Quinn deep sockets.stl is the longest part at 218.30 mm.
• For the short sockets print the Quinn short sockets.stl. All sockets vary in size. Yours may fit a little snug or loose. These holes are sized for the Quinn sockets that I have. I suggest printing the letters in a contrasting color. See photo.
• The Quinn inlay.stl can be printed in one color. The ratchet will cover it most of the time. It will look best in two colors. See photo.
• The Quinn ratchet cradle.stl. Harbor Freight has several different ¼" ratchets. This cradle is generic and will fit the Quinn Master set 90 tooth ratchet, the Quinn soft grip 72 tooth ratchet, the Quinn soft grip 90 tooth sans the soft grip. It should also fit the Pittsburgh Pro ¼" ratchets. I made this cradle separate so that it can be custom fit as desired. Just redraw the part in Fusion 360. Depending on what you might do you may have to shorten or lengthen the Quinn inlay too.
• I have included a copy of the Fusion 360 file so that you can do whatever you wish to the file. Maybe you want the holes looser. Make them bigger if you want. The ratchet cradle is universal for all ratchets. Redesign it to fit your exact ratchet handle if you want.
   

I am a rookie…an honest to God rookie with Fusion 360. I have no doubt a more experienced person can make this design print faster and with less filament. Nonetheless, I am pleased with the end result. 

I can not say for sure, but the tray may also fit Lowe's Kobalt mini toolbox. If you have this toolbox measure the upper tray. Remember, this tray is 273 mm x 145 mm. 

FYI: I have made three of these. Two for purchased Quinn Master Sets and one for a set of Quinn sockets. The difference between the two is the master set has a few sockets the off-the-shelf socket sets don't. Anyhow, you'd think they'd all be the same diameter, but I have found they are not. This means you may find that some of the holes need upsizing. I tried my rotary with a sanding drum. This will do the trick, but you have to go carefully because it builds up heat and PLA can start gumming up. I tried a different way that I like much better. Chuck the tight socket in a drill and spin it in its hole. I waller the drill around to push the walls out ever so much. This builds up heat, but it doesn't ball up any PLA. For the smaller sockets that in theory each have the same base diameter, I measured each one to find the largest one. I used this one to ream all the smaller holes. I worked at it a while and eventually got the holes resized. My sizing problem my be that my printer isn't very accurate and doesn't make a hole the size it is supposed to be. Maybe your printer is better at this than mine. \_(ツ)_/ I have included my Fusion file that you can also edited to your desire. Good luck.