18mm CO2 Laser Lens/Mirror Mounting for K40

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Other products by : Lightobject
 Item# :   LSR-LH1820B
239 units available
  Price :   $18.50
 Quantity :  


This is a laser head with air-assist . The laser head is capable of hosting a 15mm/18mm diameter focus lens and a 20mm diameter reflection mirror. With the O-ring in the lens holder, the laser head now can install a 15mm diameter focus lens.


This is a GREAT replacement for K40 or D40 that comes with no air-assist in original packing!


Air plug outer diameter: 5.5mm


Mounting plate cut hole requirement : 14.5mm in diameter


Suggested tubing:  5X8 Silicon Flex Tube for CO2 Water Cooling



Average Rating:
(based on 26 reviews)

Showing 1 - 5 of 26 Reviews:

by ismail
on 2/6/2018
A Must-have
It improved the engraving quality a lot, don't forget the replace the lens with 18mm though (I bought the lens here as well). I don't know if it's the lens, or the head or both together improved the quality but I am very satisfied.
by Ryan C Minnig
on 9/11/2017
Must have upgrade
I purchased this item after having done some minimal hacking in the infamous "K40 - laser from China". For me, this was a drop in replacement that required no modification to the machine. I would suggest a better drawing showing where the lens goes as I had a little trial and error here. There was a spacer ring the I ended up removing because with it in place, only 1-2 threads engaged in the lens housing. Be gentle and only finger tighten the lens portion. I would also strongly suggest buying a mirror, lens and tubing at the same time. lens: LSR-LEN18ZN5I mirror: LSR-MIR20MSI tubing: LSR-WTUBE5X8 This works well paired with at least a 950gph (2cfm) air pump. A small aquarium pump does not have the flow rate.
by Ray Lufkin
on 9/9/2017
Nice product
Well buit and executed device. Tried one that was 3d printed and it didn't work properly
by chance
on 6/28/2017
Definite improvement over original
Used to upgrade my 40 watt laser. I tried two of the 3D printed options while waiting for this to arrive. Really, no comparison. This fit perfectly and is very tight. No adjustments needed and having the nozzle really reduces the smoke. We've used both an aquarium air pump and aquarium tubing with high volume and low pressure as well as a more expensive airbrush compressor with compression fittings with lower volume but higher delivered pressure. Both worked well. For our cutting application with thick wood and slow feed speeds the airbrush compressor works a bit better, but this is subjective.
by Arthur
on 5/11/2017
You need a 12mm diameter lens
It says 'The laser head is capable of hosting a 18mm focus lens' I assumed this meant 18mm in diameter as a focal length of 18mm wouldn't reach past the air assist nozzle. I couldn't see how to get a 18mm lens to fit, no instructions to show how it might be possible. I bought a 12mm lens which fits. Product wasgreat once I got over the lens size issue.
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