BLF Interest List: EX3 High Current Beryllium Copper Silver Plated springs - Still selling my springs :)

I STILL DO NOT HAVE THE EMITTERS.

THESE ARE ONLY PICS FROM THE MANUFACTURERS.

Sorry for partially getting your hopes up.

No worries. That’s what I get for making an assumption :person_facepalming:

Luckily I put some 5D XP-L HIs in for the time being so I’m happy :smiley:

You could use a SnPbAg 62/36/2 silver bearing solder for better conductivity.

Thank you 007, to me that seems a good solution and perhaps a good investment to for future soldering pleasures. Thanks for the tip!

:BEER:

- SAM -

It confirms the tint bin, though! :smiley:

Yep.

The work I did with my dual BeCu springs in my GT Mini tailcap.

Estimated time for the stuff to be ready? I see the leds are on its way or sort of, the springs not yet…

When should O:) I pay? My emitters are all at $1.55 each (3500 & 4000K), doesn't it?

welp missed out on 219Bs (impossible to find now imo) so I’m hoping these sst20s bring me at least within spitting distance :slight_smile:

@Barkuti, will send you the payments once I receive the LEDs.

@Sam, I took the picture like you wanted. And they fit fine.

Is there a chance that we will get springs and LEDs by the end of July?

Yes.

Will order the springs next week.

I personally can’t wait to get them, especially since the improvement is 20-25% over the 2nd gen while having the same good mechanical properties are the 1st gen springs.

In which way 2nd gen springs have worse mechanical properties versus 1st gen ones? Just the big spring due to some deformation?

Yeah, just the big spring.

See, from the feedback of some members, I decided to remove a coil from the large springs, along with making the top diameter smaller.

While making the top diameter smaller was a good idea for broader compatibility, what I forgot to think about during my calculations was that removing one coil while having a smaller top meant that more force had to be applied for compression, and since removing a coil meant more force per coil was being applied, well…

The spring deformation went from 0,9mm right down to 2,8mm, which was not very good.

The 25% improvement in conductivity was nice, but not worth that large deformation.

So, I took a lot more time on my hands to find a new way to improve the spring, which was hard and time consuming, but lead to these developments:

1. Could change the material to BeCu C17500 45% IACS. Was not going to happen for obvious reasons, being that mechanical properties are quite important.
2. Could change the material to BeCu C17550 60% IACS. However, cost would explode to stratosphere levels.
3. Finally, after a lot of research, and myself getting a new job, I found that electroplating a thick copper layer(20-25um) would result in the same performance boost of 20-25% of the large spring, but while preserving the goal of having good mechanical properties.

And that goal was met, and the improvement is actually even better than I intially predicted, since the conductivity boost of the 3rd Gen springs are applied to both sizes of springs.

TLDR: The 3rd Gen springs are a large overall improvement over all previous generations of springs.

That’s a lot of LEDs.

Yes of course.
Wait until you see how many springs I usually order. :slight_smile:

I should start shipping LEDs only orders next week.
I’ll try to do it as quickly as possible, and as well as possible of course.

I have received the SST-20 FD2 LEDs.
Will start shipping them Monday for the LED only orders.

I have also ordered the 3rd Generation BeCu springs.
Anyone interested in getting the 3rd Gen BeCu springs now, post your interest below.

Hey, BlueSwordM, would you consider making some shorter springs sometime? I was working on a light today, and was thinking of changing the springs to Blue™ springs, but the “small” spring from you was still a good bit taller than the Qlite driver’s stock spring. I was looking at my Astrolux S42 a few days ago, and the tail spring is particularly pitiful looking. But I can’t change it either, because it is very low profile, and I don’t have any springs that will fit in its place. Even a Qlite driver spring is taller.

That is some good advice. Would have to make some smaller springs one day.

However, you may be out of luck with the S42 spring.

Your only option is a bypass, since it’s a press-fit spring, and soldering to aluminium is well, you already know.

I’m not worried about the press fit of the S42 spring. I would just make a copper round piece and solder a short spring to it - if I had a short spring available.

Huh, do you have a special kind of flux for this?

Because soldering copper to aluminium is still very hard.

Hope you can do this though.