BLF Interest list for Very High Current Beryllium Copper springs Pt1(ENDED)

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Kit Latura
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35 please

contactcr
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Have you asked for a Sample from this manufacturer? Not necessarily in the exact size but it would be smart to test one ahead of time for quality if possible

BlueSwordM
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@contacr thank you I had completely forgotten about that thank you.

I will request a sample. I do have confidence in the supplier though.

They have had a factory for 10 years on their page, and 19 years in total.

I will ask a sample for 10pcs, though it is going to be expensive.

tatasal
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Will the springs be shipped directly to people in the paid list if ever?

Do the price quoted include shipping?

contactcr
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BlueSwordM wrote:
@contacr thank you I had completely forgotten about that thank you.

I will request a sample. I do have confidence in the supplier though.

They have had a factory for 10 years on their page, and 19 years in total.

I will ask a sample for 10pcs, though it is going to be expensive.

Just something they already have in stock of the same material if possible to see the plating, finishing, test resistance and stuff. Make sure it sits nice and flat and has a good top with bounce.

giorgoskok
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I would be in , but i would like to see a test of the sample first …

Btw , after testing numerous springs , the ideal size for me is this : https://www.fasttech.com/products/0/10002798/4380403-gold-plated-battery...

7mm top is really small

BlueSwordM
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@tatasal, this is only an interest list. If there is enough demand and the samples I will order are good and very low resistance, I will buy the complete 1000pcs and ship them to everybody.

No the prices do not include shipping. The max INTERNATIONAL shipping price should be at max 8$, and probably lower, as that is only an estimate. I will try to find a way to make shipping as inexpensive as possible however.

My goal is not to make a profit, but get the best springs possible to everyone. Even if I have to pay a bit of the shipping fees out of my pocket.

@contactcr, I have asked for 10pcs of the Beryllium springs for 20% of the price we have agreed on. If everything goes well, then the group buy will begin, and not the interest list only LOL

BlueSwordM
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@giorgoskok, actually, 7mm top is about perfect for all scenarios.

I based my springs upon the BLF Q8’s springs, but made the bottom diameter just a bit smaller for universal compatibility with all switch board, and top a little wider for as much contact area as possible on the cell.

SKV89
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In for 20

Klotski
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Interested 25-50 depending on price

shirnask
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Interested in 50 – 50

BlueSwordM
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Wow. Amazing. So many people want these kind of springs.

I had not expected such a demand.

If there are any springs left, if any، I will give the rest to Richard at MtnElectronics and will point him to my supplier so we can get these springs all year long.

Finally, I will post some IRL picture of what the 12×9×7mm springs look like, so you have an idea.

giorgoskok
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Sign me for 20

BlueSwordM
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UPDATE

Pics

The big spring is equivalent to the spring I have sent a diagram and measurements to the spring supplier. It is equivalent in size to the BLF Q8 spring, except that the bottom diameter will be smaller by 1mm to accommodate almost all tail caps and switch boards.

The small spring is the Fasttech Carobronze one just for comparison.

Once I get my sample of Beryllium Copper 38% IACS springs, I will compare all of the springs and compare their conductivity. If they are good, then the groupbuy will commence!

Also, if there is enough interest for the smaller driver side spring, I will ask the manufacturer to make a batch for it.

tatasal
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Sixteen big and twelve small for me.

BlueSwordM
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Updated again.

We are up to 736 big springs, and 117 small springs.

We are getting close Beer

moderator007
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I’m in for 10 smaller springs. Thanks Thumbs Up

BlueSwordM
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Added to the list.

@chatika, there is actually a reason for the top of the spring being larger than the bottom.

This is to allow smaller cells to have contact with the spring, that’s all. It also looks better for some reason than a symmetrical spring.

richnpc
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Interested in 20 large, and 10 small, if they prove to perform well.

mattlward
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Put me in for 15.

EDC rotation:
Convoy S2+, 6*7135, XM-L2 3D, 10 degree TIR, PilotDog lighted tailcap.
Convoy S2+, H17F, XM-L2 4C, lighted tailcap
Zebralight SC52w-L2
Zebralight SC62w
Olight S1A
Olight S1R

Chatika vas Paus
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Most batteries have a large enough anode to ensure contact with the 5mm spring.
Anyway. Please change my numbers into (for now) 50 large and 40 small springs.

Forever beginner.

 

g_damian
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Please add 30 small springs for me and 10 big, so 30 of each in total.

Barkuti
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Is the FastTech carobronze 4mm top diameter? ∅7mm of base, 10mm in height. This info in the opening post would be wise.

I'd like to wait a bit for the resistance test measurements, will them be soon? 

 

Cheers Party

CrashOne
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How easy is it to replace the springs in the Q8? If it’s easy for someone with not that much soldering experience, I’ll buy a set for the Q8.

KawiBoy1428
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I’d be in for 20 Large and 10 small please…

KB1428 “Live Life WOT”

sienna
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Put me in 20 Large and 10 small. Thanks.

Tom Tom
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A thought: conical springs, well designed, can be compressed almost flat without becoming coil-bound. These ones don’t look as if they can do that. Hopefully not a problem in this application. What is the height when fully compressed ?

KawiBoy1428
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Coil bind could be a possible safety feature with some combinations of driver depths, driver retainer rings and large battery contacts, like some 26650 flat tops, my Cometa comes to mind… Big Smile

KB1428 “Live Life WOT”

BlueSwordM
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The height when fully compressed is 4mm.

BlueSwordM
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@Barkuti, I have asked for a sample of 10 springs to the manufacturer, and there being a holiday, I have not seen a response yet.

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