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

I use a 30 caliber gas check soldered to my springs to prevent damage and to provide maximum contact with the cells in high current lights.

1. Your idea is nice, but wouldn’t work actually, for multiple reasons.

For the 1st reason being that it’s not necessary.
I’ve done the calculations, and asked the manufacturer, and a 25um layer radius wouldn’t affect the mechanical properties in any way.

Second reason being that plating such large thickness would not only be expensive, impractical, but also BAD, because doing such a thick layer(50um) would require multiple baths, and start introducing crystalline imperfections at over say 100um.

And you can’t actually plate Beryllium copper. Due to having different properties of metals in the solution, the metals will plate out selectively, and the properties we want will be completely wasted, and the spring would become toxic if ever sanded, unlike the current copper alloy.

Finally, starting with BeCu C17500 would result in worse mechanical properties than what I want, and plating BeCu C17530, which is impossible, would not help in any noticeable way, and would be a worse option anyway. And using a copper wire as the base would be a very bad idea for obvious reasons.

2. Would be nice, but would cost more and require additional manual labor.
Would help if it was gold plated.

TLDR: Plating copper(20-25um)+silver on a BeCu C17530 38% IACS spring is our current best bet without going for the experimental BeCu C17550 60% IACS that is stupidly and crazily expensive, and in small quantities now

@Marc E and DavidEF, that’s it.

In for 12 of the unicorn emitters.

I’m in for:

20 large 3.0 springs
20 small 3.0 springs

Thanks for offering these.

In for 10 of the SST-20’s.

Thx!

Wow! Some n00b came here O:) and broke the forum page layout because he forgot to limit que maximum width span of his picture.

Related to this, when using the Advanced Post Editor the way I do is to specify 100% for both dimensions (relates to aspect ratio) and then, in the advanced tab, for Style I set max-width: n% where n is the maximum relative span which should be set no larger than 100%.

The max-width thing option would be something nice if set in the forum code, so no more page layout messes.

By the way, what's the budget phosphor bronze IACS rating?

:-)

19% IACS.

Do you have my 3 SST-20 FD2 LEDs on your list (BLF Interest List for Silver Plated High Current Beryllium Copper Springs upgrade and 95+CRI SST20/LH351D LEDs! )? I don’t see me on your spreadsheet.

Mmm, what does that means? $0.15 each small phosphor bronze spring and $0.20 each big spring? I just see a “C54400” column in the spreadsheet table so…

:-)

Thanks DavidEF/BlueSwordM.

In which case i’d like to add another 10 large and 10 small v3 springs to my order, taking the total to 20 of each.
And can you add 5 GA3s if that’s an option please?

I don’t have the prices yet, since I haven’t yet received an answer from the manufacturer.

I’ll do 10 of the SST-20s.

We are at 481 LEDs!

We’ll probably reach 500 LEDs soon, and I’ll be able to order the LEDs probably Wednesday.

Please put me down for 10 SST20’s.

We are at 491 LEDs:

I’m in for:
20 larger springs 3
10 FD2s

We are at 516pcs!

Now that it’s confirmed that there is enough interest, I’ll start sending payments for the LEDs only, starting in Sunday.

I will order the LEDs on Wednesday, on June 5th.

Awesome! Thanks for facilitating this.

Yes, but people can still enter, which is great.

I want as many people as possible to get on here.