Big  Blue Saw



I wanted a steel multitool to show off to customers and potentially use as a giveaway. I found this clever design by seanmichaelragan on Thingiverse. The original design "incorporates 21 distinct wrenches for metric and SAE nuts, 3 flat screwdrivers, a serrated cutting edge, a can opener, a wire breaker, a centerfinding tool, and a lanyard loop hole." The design, available on the download page, included a DXF version, which made it much easier to work with for waterjet cutting.

I did have to clean up a few typical problems with the file: unclosed contours, overlapping lines, and the like. If you're familiar with Big Blue Saw, you probably already know what the final DXF should look like and how to clean up a problematic DXF for waterjet cutting.

After a little scrubbing in QCad, the design was ready for waterjet cutting.

There were a couple issues with this design, however. One was that the smallest wrench holes were too small to be useful after cut on the waterjet due to the waterjet's kerf of 0.04 inches (1 mm). The other was that there needed to be a place to put the Big Blue Saw logo. So, with some reluctance, I eliminated a few of the features.

The final piece, cut from 1/4 inch thick 1018 cold rolled steel, came out great, and has a nice spot for a Big Blue Saw sticker.

Using carbon steel instead of stainless gives it a sort of steampunk look. I can imagine Captain Nemo using one of these to repair the Nautilus.

If you have a multitool design you'd like us to waterjet cut, read our FAQ on CAD files, then upload your design to get an immediate quote and order online.