Custom CARBLESS VapCap Ti stems

funkyhomer

funkyhomer

Well-Known Member
Be
stardustsailor said:
My new Simple -Durable -Superb VapCap .
:love:





Tip : Dynavap Titanium Gr2 ,version 5.0
Stem : Custom SDS Titanium Gr2 ,62 mm ,carbless ,Twister knurled
Mouthpiece : Custom SDS ,17 mm ( 30 mm total ) ,Titanium Gr2 ,version 2.1
Condenser : None
O-rings : 6x VMQ Silicone ,75 dur. ( OD 8mm / ID 6mm / CS 1 mm )
Weight : 16.5 gr ( w/o cap )


Cheers.
:science:
Click to expand...

Beautiful! Off the top of your head, is 16.5 grams heavier than an omnivap xl?
 
cybrguy

cybrguy

Putin is a War Criminal
Interesting. My XL Ti Omni (abstract stem) is about 14.1g without a cap. That is obviously with an Omni condenser in it and is XL length.

Note: It also has my LE tip which is apparently around .15g heavier than my Gen5 tip. And they are both dirty, so that too... ;)
 
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stardustsailor

stardustsailor

Well-Known Member
Accessory Maker
funkyhomer said:
Be


Beautiful! Off the top of your head, is 16.5 grams heavier than an omnivap xl?
Click to expand...
I never owned an OMNI ,but your question is answered .
;)

cybrguy said:
Interesting. My XL Ti Omni (abstract stem) is about 14.1g without a cap. That is obviously with an Omni condenser in it and is XL length.
Click to expand...

A Titanium grade 2 tube of 62 mm length ( ID 8 mm / OD 10 mm /CS 1mm ) that is used to make
VapCap stems has a initial weight of 7,9 grams ,before any machining is done.

At my stem only two slight grooves are done ,thus a neligible amount of material is removed .
The knurling operation does not remove any material ,but rather displaces it ( cold forming ) .
Knurling also hardens the machined portion of the stem.

From the other hand the Dynavap OMNI stems are extremely lightweight ,since quite an amount of material has been removed by the CNC milling.

Also most probably my mps are heavier than the OMNI ones.


Tip with 4x VMQ o-rings : 2,96 gr
Mp with 2x VMQ o-rings : 5,70 gr
Stem : 7,84 gr

Cheers.
 
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stardustsailor

stardustsailor

Well-Known Member
Accessory Maker
Every -unmachined -piece of Titanium grade 2 62 mm long tube that I've weighed
gives a reading around 7.9 grams.

There's also a mathematical way of calculating the weight of a 62 mm long
Titanium grade 2 tube .

Weight = Density * Volume

The density of Titanium grade 2 is 4.51 grams per cubic centimeter.
One cubic centimeter is equal to one thousand cubic millimeters.

Thus density of Titanium grade 2 can be expressed as 0.00451 grams per cubic millimeter .

Volume of a 62 mm long tube ,having an Outer Diameter of 10 mm
and an Inner Diameter of 8 mm ,is given by this equation :
π( O radius^2 - I radius^2 ) * length

Thus :
Volume = 3,14 * (25-16 ) mm^2 * 62 mm = 1,752 .12 mm^3

Now ,since we know the volume of the 62 mm tube :
Weight = 1,752.12 mm^3 * 0.00451 gr /mm^3 = 7.902 gr



Cheers.
 
almost there

almost there

Well-Known Member
stardustsailor said:
Every -unmachined -piece of Titanium grade 2 62 mm long tube that I've weighed
gives a reading around 7.9 grams.

There's also a mathematical way of calculating the weight of a 62 mm long
Titanium grade 2 tube .

Weight = Density * Volume

The density of Titanium grade 2 is 4.51 grams per cubic centimeter.
One cubic centimeter is equal to one thousand cubic millimeters.

Thus density of Titanium grade 2 can be expressed as 0.00451 grams per cubic millimeter .

Volume of a 62 mm long tube ,having an Outer Diameter of 10 mm
and an Inner Diameter of 8 mm ,is given by this equation :
π( O radius^2 - I radius^2 ) * length

Thus :
Volume = 3,14 * (25-16 ) mm^2 * 62 mm = 1,752 .12 mm^3

Now ,since we know the volume of the 62 mm tube :
Weight = 1,752.12 mm^3 * 0.00451 gr /mm^3 = 7.902 gr



Cheers.
Click to expand...
If I didn’t think u were so cool i’d Call u a nerd:nod:
 
V-apE

V-apE

☮☮☮
Holy crap!! I better start saving up again!

@SdS,absolutely stunning!:love:

But i'm also happy with my new friend you made me,here in heavy first action!:lol:

Edit: 2 more pics.

f228ba.jpg


14ujcbm.jpg

v761jt.jpg
 
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stardustsailor

stardustsailor

Well-Known Member
Accessory Maker
A new version of the CCD tool.
:science:



Instead of a pointy end, now it has a hollow point .
This end of the tool is used to remove the CCD from the tip ,but also now
with it's hollow end ,it can be used to collect the reclaim oil / sticky particles from inside the
tip's inner tube. Also a small piece of cotton can be inserted into the hollow point ( like a q-tip / ear cotton bud )and then the tool can be used to clean the inner tube of the tip .



Cheers.
 
Skunkport

Skunkport

Well-Known Member
Stunning work there! I'm too wrecked to know which I like best right now, but I did have an idea about your BTTB concept which seems to make sense. I think I had it because your concept kindof looks like a cigarette backwards.
How about a very thin strip of titanium rolled up into a spiral, like a roach, just inside the heated end to increase the surface area? I really don't know anything about how you're crafting these but it seems simple to make in my head right now compared to fins and grooves.
 
stardustsailor

stardustsailor

Well-Known Member
Accessory Maker
Skunkport said:
Stunning work there! I'm too wrecked to know which I like best right now, but I did have an idea about your BTTB concept which seems to make sense. I think I had it because your concept kindof looks like a cigarette backwards.
How about a very thin strip of titanium rolled up into a spiral, like a roach, just inside the heated end to increase the surface area? I really don't know anything about how you're crafting these but it seems simple to make in my head right now compared to fins and grooves.
Click to expand...
Yes,i've thought of that .
I can find Titanium grade 2 & 5 foils ,of various thickness(es ? ).
But I've set the whole concept on halt and will be revisited in the near future.
 
stardustsailor

stardustsailor

Well-Known Member
Accessory Maker
Few close-ups from a SDS stem mouthpiece .
It is machined from a 30 mm long Ti rod piece ( 10 mm Dia. ) .











- This kind of mp does not spin .
- Has an average weight of 5.5 grams .
- Do not attach to any Dynavap condenser (standard or XL SS,Ti or OMNI ) .
- Can be used as a tool to insert a CCD inside the tip.
- Can be attached to any kind of stem with a 8 mm inner diameter .
- It serves as a "balancing weight" ,for relocating the center of balance of the VC device.

And finally ,2x Dynavap Size* o-rings are used ,for the mouthpiece to be
attached firmly to the stem's tube.


*
Dynavap Size O-rings :

Used at both the SS tips ( 3x ) and the Ti tips ( 4x) .
Also used at the OMNI condenser system (3x) .

Dynavap uses Viton ( FKM ) ones,
but as an alternative silicone ( VMQ ) ones can be used.

Inner Diameter (ID) : 6 mm
Outer Diameter (OD) : 8 mm
Cross Section (CS) : 1 mm
Durometer (Shore hardness) : no less than 70 -75
Click to expand...
 
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natural farmer

natural farmer

Well-Known Member
stardustsailor said:
Few close-ups from a SDS stem mouthpiece .
It is machined from a 30 mm long Ti rod piece ( 10 mm Dia. ) .











- This kind of mp does not spin .
- Has an average weight of 5.5 grams .
- Do not attach to any Dynavap condenser (standard or XL SS,Ti or OMNI ) .
- Can be used as a tool to insert a CCD inside the tip.
- Can be attached to any kind of stem with a 8 mm inner diameter .
- It serves as a "balancing weight" ,for relocating the center of balance of the VC device.

And finally ,2x Dynavap Size* o-rings are used ,for the mouthpiece to be
attached firmly to the stem's tube.


*
Click to expand...
It looks so much shinier than DV's Tis, both outside and inside! :brow:
 
stardustsailor

stardustsailor

Well-Known Member
Accessory Maker
natural farmer said:
It looks so much shinier than DV's Tis, both outside and inside! :brow:
Click to expand...

Yes,quite normal.

Each custom mouthpiece needs about 90 minutes to be machined from a Ti rod piece,with my current equipment ( low power mini-lathe with no lubricant-cooling system ) .
I've to go slow to avoid overheating of the titanium piece,
which will lead to Ti surface galling and cutting tool failures.
Then it takes about 45 to 60 minutes to polish the mp inside and out .
So,every mp needs more than two hours to be finished.
I'm pretty sure DV has the equipment to fabricate mouthpieces at a fraction of time I need to make them.

But then ,polishing ...

Several techniques can be used to clean and smoothen the titanium substrate surface,
namely chemical, mechanical and thermal polishing.Chemical polishing requires HF-containing acid solutions and it does not provide as smooth a surface as the other methods;mechanical polishing can provide a very smooth and flat surface topography, but it is work-intensive and time consuming, furthermore, polishing media can become embedded in the surface.
Thermal polishing requires heat-treatment in a high vacuum and specimens must be very clean to start with.Compared to the other polishing processes, electropolishing is an effective method to clean, smoothen and polish, the titanium surface. It removes impurities from the metal surface and gives the surface a high luster.

https://www.electrochem.org/dl/ma/201/pdfs/0384.pdf

Still electropolishing uses kinda dangerous (explosive or Fluorine-containing ) electrolyte solutions ...
https://www.jim.or.jp/journal/e/pdf3/52/11/2061.pdf
...and it needs special equipment and skills ,of course.

The easy and affordable way is mechanical polishing .But is time-consuming.
For DV to polish each of the Ti piece they fabricate is rather counterproductive.
It is not an easy "issue" to solve efficiently-without a profound impact
at the production rate .
And while non-polished Ti parts can be an aesthetic issue for some ,
is not an operational one for anyone.
:2c:

Cheers.
:peace:
 
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