Makita Guide Rail Glass-Cutter Adapter

thingiverse

I needed a holder for my glass cutter, so I can make reliably straight cuts. I cut apart [a router adaptor](https://www.thingiverse.com/thing:4888671) to get the guide rail interface without designing it from scratch. I added two holes for brass press-inserts, so I can use two M3 screws to mount the glass cutter mounting arm parts on the rail interface. Also added a Makita logo while I was at it, because why not :-) The Guide Rail Insert is available in two versions, one with and one without the little indicator. The indicator points to 1 mm from the edge of the insert's edge, since (in my case) that is where the cut will be, so this should make it easier to position the Guide Rail right where the cut will be. I figured this might vary from cutter to cutter, hence the version without the indicator is available as well. The arm can swivel a bit, so it is possible to move it around without actually cutting, then press down to cut while moving on the rail, for nice smooth and straight cuts. For the mounting arm I used 5 mm acrylic, cut on my laser cutter, but since not everybody has a laser cutter, I included STL and 3MF versions of the arm parts. Feel free to resize them to be thinner if you wish, 5 mm is probably overkill, but that's the thickness of the acrylic crap I used in this case. I used 3 screws (M3) to mount the cutter, 16 mm length is just enough for a nut to fit on the other side. To mount the arm on the rail interface, I used 2 screws (M3) at 12 mm length. Consider adding a washer between the screw head and the arm for the screw that allows swiveling. It's supposed to be movable after all, so don't tighten it too much. The 'Press protector' part is just to slide into the rail interface while pressing in the brass press fittings, to reduce the risk of breaking or deforming the rail. I also added a mini-version of the Guide Rail Insert models, without logos, if you just need a quick print with just the bare minimum.