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

BlueSwordM · 2018-06-29T03:08:11.000Z

Thanks again :+1:

UPDATE 4

The final cost for 2000 springs has been confirmed by my supplier.

350$US for 2000 springs. I will check with the supplier how much it would cost for 3000pcs and 4000pcs springs.

teacher · 2018-06-29T04:16:44.000Z

I’ll ‘spring’ for a few more if it helps drop the price even more. :+1:

moderator007 · 2018-06-29T04:29:53.000Z

Cheaper price per spring means people will order more springs for almost the same money.
Please up my order to 30 large and 30 small.

djozz · 2018-06-29T09:04:11.000Z

I’m a bit conservative, I will wait for the sample test. If they work out well I like to ’upgrade to 20’small 20 large.
And if the samples appear not good enough to go for the large order, I’m happy to donate a few dollars to compensate for the sample costs.

BlueSwordM · 2018-06-29T13:11:14.000Z

Yeah I am waiting for them to respond about the samples.

BlueSwordM · 2018-12-29T22:30:24.000Z

Another day, another update... again. Here what they said this time:

Hi Blue,

Good Day!!!
I have double checked:

Within 2000pcs: USD308
About 3000～5000pcs: USD460

Shipping small more expensive than 2000pcs.

Price is not too higher because of bulk purchases.

Pls kindly let me know if any questions.

Wow that is a good price. But I don't think we will ever reach that number :D

Could give them to Richard and ASF if the sample springs are great.

marsalla · 2018-06-29T15:05:21.000Z

are we sure it is safe to use this type of metal in a flashlight. Navy divers use this combination of metals in a dive knife but you cannot sharpen it with out a respirator due to dust causing cancer.

BlueSwordM · 2018-06-29T17:44:04.000Z

It is safe yes in a flashlight yes. I’ve made the research about it, and unless you sharpen the spring or melt down the spring for some reason, there should be nothing to worry about at all. I do get the concern though, but there is no risk of that in a flashlight. And since we don’t use lasers to make springs, that is not a problem too.

BlueSwordM · 2018-06-30T03:42:57.000Z

Guys, I finally recovered the information I was looking for when talking about which battery spring material to use in terms of elasticity and YIELD STRENGTH!

Elasticity is good, but since all beryllium coppers feature about the same elasticity +/- 2%, I will leave that out.

What really matters is yield strength, which is how much force a material in spring form can sustain before resulting in a plastic deformation, such as the in the Intl Outdoor BeCu 45% IACS spring.

Here is some data about it:

Steel is the strongest at 1700MPa Typical

Phosphor bronze is in the middle at 895Mpa Typical

Beryllium Copper C17530 38% IACS is a bit behind at 820Mpa Typical

Beryllium Copper C17500 45% IACS is quite a lot behind at 620-680Mpa Typical

As you can see, the reason for the BeCU 45% IACS Intl Outdoor spring for failing in djozz’s tests is that it can’t resist as much to a deformation as well as the others, resulting in a quite a bit higher chance of plastic deformation such as the previously mentioned djozz spring test.

Mr.Scott · 2018-06-30T05:13:58.000Z

DavidEF:

If the price per spring is more than double for quantity of 1000 versus 2000, then it is ridiculous to buy 1000 and pay actually more for fewer springs. For instance, if the price is $0.175/ea for 2000pcs but it is $0.50/ea for 1000pcs, the real total cost is $350 for 2000pcs but it is $500 for 1000pcs! There is no sense paying more for the privilege of receiving less! I’m not saying this is the actual cost per 1000. I’m just saying that if the difference is double or more, it doesn’t make sense at all to do it. From that, you can calculate the highest “premium” that would make any sense to buy, being $0.345/ea for 1000, or just under double price. Then again, you’d still have to be silly to pay such a difference, IMHO. But, if we use that number, the total cost for 2000 lg + 1000 sm springs can’t be more than $350 + $345 (+ $100 for samples) = $795 TOTAL! That makes the average price of a spring just a bit over $0.26/ea plus shipping from Bluesword to each of the group buy participants. The more you buy as an individual, the lower your per-spring cost will be!

Yes, but the cost of $0.26 assumes all are sold. Not fair if Bluesword gets stuck holding unsold springs. If this was a business, that is one of the risks, but since this is a group buy we should consider sharing the cost of unsold stock. Just not sure how to do that fairly.

Mr.Scott · 2018-06-30T05:18:14.000Z

djozz:

I’m a bit conservative, I will wait for the sample test. If they work out well I like to ’upgrade to 20’small 20 large.
And if the samples appear not good enough to go for the large order, I’m happy to donate a few dollars to compensate for the sample costs.

I agree.

If the sample test works I’ll take 30 large and 30 small. If the test doesn’t look good then I’ll kick in some to help with the sample.

gisewhcs · 2018-06-30T14:02:27.000Z

Same here. If the samples are not as expected I would spend a few dollars to get the sample costs covered.

shirnask · 2018-06-30T15:32:59.000Z

/\ :+1:

moderator007 · 2018-06-30T16:10:14.000Z

I’m in for helping cover the sample cost if the turn out to be crap .

vinte77 · 2018-06-30T17:30:25.000Z

moderator007:

I’m in for helping cover the sample cost if the turn out to be crap .

Same here, let us know.

MRsDNF · 2018-06-30T21:28:01.000Z

vinte77:

moderator007:

I’m in for helping cover the sample cost if the turn out to be crap .

Same here, let us know.

yes as well.

khas · 2018-07-01T18:22:08.000Z

Please put me down for 30 of each, and if they turn out to be made of old paperclips, I’ll be happy send some money to help cover sample costs as well.

Thank you for setting this up :+1:

BlueSwordM · 2018-07-01T19:07:24.000Z

Wow.

I never expected such support.

Now, if 5$/spring do not turn out to be the bee’s knees, I will be quite angry.

I do doubt they would risk their reputation however for such a purchase, especially since it is really easy to check if the samples are crap using a multimeter and a power supply.

One last thing before I make the final request and pay for the samples: are there any parts/products you would like to have in a group buy?

Just a question, but seeing the potential of a group buy for us getting things at a much lower cost than initially possible makes me happy.

joechina · 2018-07-01T19:49:32.000Z

djozz:

DavidEF:

joechina:

Interested in 10 big an 10 small springs

Not picking on you. I know there are valid reasons for buying just a few rather than a lot more. But, according to my calculations above, based on what BlueSwordM has said about pricing so far, your shipping will be almost double what you’re paying for the springs themselves for such a small quantity.

I do not know about Canada but when I shipped my springs a few years ago it was just about 3 dollar worldwide including bubble mailer (up to about 20 springs). You just do not want to get into tracking and such but the value is low enough to accept some risk.

Well I never modded springs. But I think it would be good to have a few good ones in the part drawer.
I am only willing to pay 15 Euros incl shipping for stuff I don’t see a use now.

Texas_Ace · 2018-07-01T20:47:38.000Z

Very nice springs. I am sure this has been answered but is there a reason you stuck with 1mm thick?

I would be in for 100 of them myself. Possibly more if I have the funds at that time and depending on what the final test works out to.