BLF style 18650 1s thrower( poor mans Olight M2X)

Hmm , maybe .

With dedomed xm-l2 focus wasn’t good with 1mm . My spacer is paper thin now , and focus seems to be just about right .

I think without a spacer would be ideal , but i dont have much time to create a custom centering ring now .

You have misunderstood what i wrote. (it was not clear what i wrote)
The 1mm distance is the copper wire ring between pill and head, so it’s under the pill rim / ledge.
The space between LED board and reflector is probably only 0.3 mm.

Yep sorry.

I edited it, it wasn’t clear.

You did fine and very interesting job here with your modd but that is just to much job. For similar I guess I would need couple of hours myself.

In 26mm mod pill will not be taller and you don’t have to cut anything. It is as easy as gluing thin copper disc(have you heard about artic alumina?), file, rasp or even lathe to make everything flat to that copper disc, 26mm pcb up on top of that and you are good to with: either gluing(AA), just thinly thermal paste(reflector has fairly enough pressure to mcpcb surface), or you can even add a screw(which imho is totally unnecessary).

I think you must buy Osram Oslon Black Flat(few of them than choose the best like Djozz said).

And BTW where are lux meter results?

Edit:
“Everything stays rather cool, i expected more heat.”

That is first sign that something is not right.

Same happens with mine current modd (26mm mcpcb are still on boat) but since I have lux meter I see that I have 260 kcd in first 5 seconds and then drastically drop to 150 kcd with good old XP-G2 S3 2B. Current draw around 4.5A.

In my light I got the best focus with both the centering piece paper-thin and the reflector base sanded thinner.

I don’t have a lux meter.

Well, it turns out one of the 12 7135 is not working, i measured 3.88 Amperes.
For the rest, it is a big head, so it just doesn’t get very hot.
The thermal path is good.

To my surprise the difference between LED board touching the reflector and with a 0.5 mm (approximately) gap between them is not really clear.
It seems it doesn’t make a difference.

Djozz could possible gain happen with drilling how to say that bottom ring of reflector.

I mean on this and to totally flat that with main reflector catching surface? Possible more light catching could happen? And it seems that reflector has enough “meat” to withstand that?

Yeah, i was thinking about removing the bottom ring too.
Then you have a hole of around 21mm, so you can use a stock 20mm LED board.
(edit: i was mistaking the Courui reflector for this one…)
But how to centre it?

Centering was the main reason to keep the bottom of the reflector intact, I think it is half a mm now, so it can still hold a centering ring. The centering piece that I used neither fitted the reflector nor the led (the Black Flat is slightly bigger than the XP-G). So I had to ream the reflector hole a bit and I had to ream the hole in the centering piece a bit. It had the advantage that I could ream it to an exact tight fit so the led is really dead-center with a minimum of play while tightening the bezel (not zero play unfortunately, closing the bezel took a few tries before the hotspot was right).

Btw, I can recommend a good reamer for flashlight modding, I have this one:

Ooh that looks like a real useful tool djozz. I have just been using a small circular file and it doesn’t work great.

Djozz,

Thanks on advice. Sadly but I never thought about that tool. Now I will try to find something similar in local store.

You mentioned that Osram Oslon Black Flat is bigger than XP-G2? But you actually thought on a base not emittier itself? OBF should be XP-E2 size right?

Hey, i think i have the same one, only the handle is a little different.
I also have a smaller one.
A ‘must have’ tool i.m.o.

By the way, a while back i saw you have the same 80 Watt soldering iron as i do.
You know, the one (from Conrad?) that gets crazy hot. :smiley:

Just checked drawer and I also have something similar for accu drill

I will sacrifice one reflector and drill that circle completely in hope that reflector will catch more light.

You will not gain much output with that, because there is not a lot of light coming from the sides of the LED.
Besides, the distance to the reflector is very short there, so it will mainly add more warm white to the corona.

And I will get rid of that corona around hotspot and get pure hotspot with spill only?

https://www.fasttech.com/products/2183/10017678/4128400-0-14mm-hole-saw-reamer-for-r-c-models

https://www.aliexpress.com/item/3mm-13mm-Bridge-Pin-Hole-Hand-Held-Reamer-T-Handle-Tapered-6-Fluted-Chamfer-Reaming-Woodworker/32802774988.html

I’m not sure how to get rid of the corona.