S41s head and extension tube mismatch

d_t_a · 2018-07-14T11:50:40.000Z

I’ve got an Astrolux S41S (quad-Nichia 219B), but I didn’t buy the S41S 18650 tube. Instead, I’ve been using the 18650 tube from an Astrolux S1 (and the Astrolux S1 is now using the included 18350 tube). So my S41S is mismatched colors, but it works…

ImA4Wheelr · 2018-07-14T11:54:36.000Z

Not pretty, but some of the Ultrafire and some generic 501's and 502's fit and work.

Henk4U2 · 2018-07-14T12:33:11.000Z

Can you see if both tubes have threads that interlock?
Better said: are pitch/threads per inch the same?
Does it look like this?

Zulumoose · 2018-07-14T12:47:50.000Z

Henk4U2:

Can you see if both tubes have threads that interlock?
Better said: are pitch/threads per inch the same?
Does it look like this?

Yes they mesh like that, diameter is the issue. Just checked against an A6 as well, should have thought of that earlier, both the S41 tubes fit the A6 head perfectly, but the A6 tube also pushes into the S41 copper head without screwing it in. It’s definitely the copper head that is either machined too far or has crushed threads.

Macka17 · 2018-07-14T13:24:50.000Z

Hi
I got my S41 coupla days ago. with separate red (weird hey??)
but red colour burnt 1\2 way down and black drawn out of tail piece.
should look “different”.

I thought mine didn’t fit too. But tube fits only one way.
and you have to push it DEEP into head b4 threads bite.
SHORT thread fits into head.
long thread with smooth collar fits onto rear sect.

And I just greased my threads and caught a blast of light when testing sw.
Damn. that’s bright. Close range I can’t see these keys hardly.
That’ll teach me. DON’T look at them. even sideways when testing sw.
These things blast it out.

Zulumoose · 2018-07-16T07:51:00.000Z

Ok I got a response from Banggood requesting a video so I uploaded to Youtube and sent them the link.

It will be interesting to see their response. I also told them that the battery tubes both fit an A6 head, which is an Astrolux S1, so it is definitely the head that is the problem, and I have told them they can just send the copper section if they want as I can swap out the components. I think that is the best solution as the cost is negligible and solves the problem completely. As long as they test first with other battery tubes, and don’t send another one from a faulty batch.

toddcshoe · 2018-07-16T08:00:59.000Z

Hope BG takes care of you. It shouldn’t cost you any more funds to fix a faulty product.

Zulumoose · 2018-07-18T11:56:52.000Z

Unbelievable, they still don’t understand the problem, after I sent them the video and this text :-

I have also tried the fit with a BLF A6 (same as Astrolux S1) and both the S41S battery tubes fit the head of the A6 perfectly, so it is definitely the head that is a problem.

I am able to swap the components so if you send just the copper section it will be fine, but please check the fit with other battery tubes before sending

their response is this

We will arrange a Astrolux S41S Silver 18650 Flashlight Tube to you, would you accept it?

RobertB · 2018-07-18T13:56:07.000Z

Looks like the 650 tube was machined wrong to me, since the 350 tube is ok. Calipers to measure the diameters?

Zulumoose · 2018-07-18T14:00:26.000Z

RobertB:

Looks like the 650 tube was machined wrong to me, since the 350 tube is ok. Calipers to measure the diameters?

See post #3

inside head 21.7mm
outside 18350 tube 21.75mm
outside 18650 tube 21.7mm

Looks like even the tube that fits is only holding on by 1/20 of a millimetre, not good!

RobertB · 2018-07-18T14:58:44.000Z

Zulumoose:

RobertB:

Looks like the 650 tube was machined wrong to me, since the 350 tube is ok. Calipers to measure the diameters?

See post #3

inside head 21.7mm
outside 18350 tube 21.75mm
outside 18650 tube 21.7mm

Looks like even the tube that fits is only holding on by 1/20 of a millimetre, not good!

I have both of the aluminum versions and they fit well.

The head ID of mine are 21.22mm (350 head) and 21.27mm (650 head)

OD on the 350 tube is 21.75, and 21.85 on the 650 tube.

Zulumoose · 2018-07-18T15:59:01.000Z

So you have roughly 10 times the thread overlap that I have.

0.53mm on the 350
0.58mm on the 650

I have

0.05 on the 350
0.00 on the 650

RobertB · 2018-07-18T16:14:20.000Z

Zulumoose:

So you have roughly 10 times the thread overlap that I have.

0.53mm on the 350
0.58mm on the 650

I have

0.05 on the 350
0.00 on the 650

Yup, looks like you’re right. Badly machined head. I would try one more time to contact them. Keep it simple, they don’t speak very good english. “Tubes good, bad head. Need new copper head”. From your video, it just looks like the 650 tube is bad. They won’t understand a long winded response. Maybe shoot another video, but leave out the 350 tube

Zulumoose · 2018-07-19T06:40:15.000Z

Ok they again offered to send a tube.

So I sent them this

The copper HEAD is the problem.

I have 4 tubes and 3 heads, see attached photo with measurements.

And I have evidence of 2 more, see post #16 from BudgetLightForum S41s head and extension tube mismatch

I have attached a picture of that post

All of the tubes will fit the other heads, with a good overlap for thread grip.

NONE of the tubes will grip My S41S head well, even my 18350 tube only holds on by 0.05mm

If you send another tube it will be the same size as all the others, around 21.7mm, which will not grip my head.

The head is supposed to be between 21.2mm and 21.4mm, like all the others.

Photo I attached :-

I don’t know why the photo shows upside down, it is the right way up on my PC thumbnail and when I open it, but saves upside down on Imgur, I haven’t run into this problem before.

RobertB · 2018-07-19T11:29:05.000Z

File a paypal dispute, maybe they will escalate it to someone who speaks English. Don’t close dispute until you get a new head, new light, or refund.

Customer service person is probably thinking, “why he show picture of wrong flashlight”, not understanding the problem

Henk4U2 · 2018-07-19T12:26:42.000Z

Hmm…… maybe the customer service person is thinking:
If the customer knows that I understand the issue at hand, he also knows that I have to admit he’s right.

Zulumoose · 2018-07-19T14:22:26.000Z

Once again:-

The replacement accessory is ssuitable to your flashlight, would you accpet it?

No understanding whatsoever, isn’t there a Banggood rep on this forum somewhere? What was his username?

Zulumoose · 2018-07-19T14:39:42.000Z

Ok this is my last ditch attempt. Banggood are looking more bang than good at this point.

to cservice

I have given measurements for 6 Astrolux tubes, all extremely close in size.
I have given measurements for 5 Astrolux heads, 3 of them S41 heads, 3 of them are extremely close in size.

The ONLY measurement that is VERY different to the others is my S41 head.

The internal diameter SHOULD be between 21.2 to 21.4mm to match the others.
It is 21.7, giving no secure overlap with ANY of the tubes.

Overlap should be about 0.5mm as on the other sets.
Only 2 of my tubes overlap on that head and the overlap is 0.05

ONE TENTH of the proper overlap.

I have explained this enough times. Please have a good English reader look through the emails.
I will lodge a Paypal dispute immediately (something I have never done before) if the next response does not show a proper understanding.

RobertB · 2018-07-19T15:18:08.000Z

Try this Banggood rep. http://budgetlightforum.com/messages/new/6714

Keep it simple. If they were to write you in their language, this is what it would look like to you.

到cservice

我已经测量了6个Astrolux管，它们的尺寸都非常接近。
我测量了5个Astrolux头，其中3个是S41头，其中3个非常接近。

与其他测量非常不同的唯一测量是我的S41头。

内径应该在21.2到21.4mm之间，以匹配其他内径。
它是21.7，与任何管都没有安全重叠。

重叠应该与其他组重约0.5mm。
我的管中只有2个重叠在那个头上，重叠是0.05

正确重叠的一个十分之一。

我已经解释了这么多次。请让一位优秀的英语读者通过电子邮件查看。
如果下一个回复没有表明正确的理解，我会立即提出Paypal争议（我之前从未做过的事情）。

Zulumoose · 2018-07-20T11:49:21.000Z

Ok

With help from the Banggood rep it seems like they have got the right idea. In fact they may be sending me a whole head.

We are deeply sorry for the inconvinence caused by the misunderstanding, to solve this problem, we plan to reship a Astrolux S41S Stailess Steel Nichia 219C Flashlight head for you, would you accept it?

I have informed them again that all I need is the copper part, but I won’t say no to a whole head.
Maybe that was a mistake, another possible source of misunderstanding.
I should just have said yes. :person_facepalming: