K40 Laser Cutter New Lens mount

thingiverse

This was designed to replace the lens mount on the K40 "Cheap Chinese 40W CO2 laser engraver/cutter." With this, you can either install the original lens or swap in a diode laser mounted in the popular aluminum diode heatsink like the one in the photo from Victoryrush on ebay (where I purchased mine from.) The heatsink should be suitable for 1W or less diodes. Will work with either. The K40 lens tube is 15mm at the point it mounts in the holder. Between the fins of the aluminum diode heatsink, it is 15.5mm. I made it to be a little snug on the laser diode heatsink and the K40 lens screws together tightly. Both expect about 1.5-1.9mm thickness. You can also use the prongs to wire-tie (think bread tie) or wrap strong fishing line around them to secure the lens/diode if you are super paranoid. Not necessary though, it isn't going to go anywhere. :) Note: I have a 2W blue diode and the heatsink above is not adequeate enough for it. I have received a new heatsink which is larger. I will be posting up another design using that heatsink+fan soon.