Video showing how to slice the dome off an LED with washers

Thanks contactcr.

Thank you for mentioning my thread :wink:

Thanks for the demonstration.

I think using smaller diameter washers work even better, since it wont allow any unwanted rotations or angles, someting that is allowed using the larger washers/ shims as shown in the video. (The corner of the razorblade tends toward the LED in the video since it is not supported by the washer)
Then a clean and straight cut will be easier to achieve by using the whole washer as a support.

Thanks for the video, very helpful! I had a few emitters arrive today for the purposes of slicing. Still need to get the right sized washers.

It’s true but the first priority is finding the right thickness. It’s a bonus if you can find a nicely sized hole but ultimately without fabricating something it might be hard. I still mess one up every now and then since I insist on making a very close cut.

Well demonstrated contactcr.

I suddenly had a thought while watching the video.

What if instead of using washers you used feeler gauges. Buy a set and drill a 6-10mm (1/4-3/8 freedom unit) hole through them. Stack them to very precise heights.

Good idea , Nooner !

That’s what I use. If you buy the right set you can do 3535 LEDs using the hinge hole without even drilling anything. Best to deburr the hole so the razor doesn’t catch the edge though.

Well done is always better than well said.
I thought I was clever but Bob McBob is already on it.
Nice to know it works.

I suppose that with the right tools you could slice it on the final pcb without using a dedicated one but washers are cheap and easy to find

What about using a chistle ground rasor blade instead of a v grind?

contactcr Do you have a Caliper to measure the thickness of the 3 washers—Thanks

It’s in the first post

Yeah, very nice. I really like that it’s possible to use the existing hole instead of drilling new ones. :+1:

Did you just add that info / are my reading /comprehension skills that bad :person_facepalming:

How to do : Dedomed xhp70.2 inside a flashlight?? bcos it seem glued permenently… I can only open the head benzel and glass lens. Now that sound like a challenge…anyone?

Nice job on the video Contactcr :+1: .
That should help get more domeless leds floating around.
I really like the magic shaving can do with some led tints.

I finally got round to slicing some LH351D 5000K emitters and this video was very helpful! Tint ends up around 4500K and looks amazing.

Thanks to this video I’ve now used the washer method to successfully slice SST-20’s SST-40’s and LH351D’s. Getting my nerves up to trying a slice & dice on a 3v 50.2 soon!

I found some soft brass washers which I could more easily sand down to get them as absolutely perfect thickness as possible. Had a 351d develop a burn spot, I’m guessing from debris, I was able to sand the final washer down slightly and just barely slice off more dome material removing the burned spot and saving the W6 led. Could I have sanded down a steel washer? Sure, but it was a whole lot easier to do to a brass one!