Sealant Gun Thread

[Neil WyattModerator @neilwyatt]

Does anyone know the thread details for sealant gun cartridges?

I picked up a couple of flexible nozzles that would do for coolant, intended for mastic guns in B&Q 'Reeech'.

Neil

 

Edited By Neil Wyatt on 26/07/2017 19:04:29

[Neil WyattModerator @neilwyatt]

[I.M. OUTAHEREParticipant @i-m-outahere]

The only thing i can find was a mention to 3/8 nps , you might have to take a thread gauge and digital calipers into your local hardware and measue one .

Ian.

[Neil WyattModerator @neilwyatt]

I have plenty to measure, but awkward truncated large pitch small diameter threads aren't the easiest…

[Ian PParticipant @ianp]

Since the operating pressure is likely to be quite low I think you can take big liberties with thread form, diameter, and pitch especially since the plastic will deform/conform when the parts get screwed together.

You could probably 'eyeball' the whole operation of screwcutting a mating (male) part and just get the major aspects close enough with a few measurements plus trial and error fitting.

Ian P

[charadamParticipant @charadam]

At these prices, why worry.

Just use some sealant to seal the thread!

http://www.sealantsandtoolsdirect.co.uk/silicones_and_sealants/sealant_tools/380ml_c4_silicone_sealant_large_tube_nozzles_pack_of_6_P24099.html

[V8EngParticipant @v8eng]

Posted by Neil Wyatt on 26/07/2017 19:03:15:

Does anyone know the thread details for sealant gun cartridges?

I picked up a couple of flexible nozzles that would do for coolant, intended for mastic guns in B&Q 'Reeech'.

Neil

Edited By Neil Wyatt on 26/07/2017 19:04:29

How about the stuff on Thingiverse would this be any help?

**LINK**

[I.M. OUTAHEREParticipant @i-m-outahere]

9/16 unc goes pretty close , pipe threads with a similar major diameter seem to have too fine a thread pitch .

The nozzles are pretty flimsy so i think the seal is achieved by having the internal thread tapered so it distorts over the male thread , a 9/16 unc bolt screws in and pulls up snug with the last turn without jumping threads or stripping .

Looking at some samples at my local hardware ( and yes i will use ANY excuse to go there – it is after all scientific research ! ) i noticed some cartridges had v form threads others were more like a buttess threads – why i know not !

[Clive Brown 1Participant @clivebrown1]

i noticed some cartridges had v form threads others were more like a buttess threads – why i know not !

A buttress thread doesn't exert much, if any, radial load, so perhaps the reason is that it's less likely to burst the thinly made nozzle.

That doesn't explain though why they're not all like that

[HOWARDTParticipant @howardt]

After a bit of searching while waiting for my car I think the thread is a GL15. See here **LINK**

It appears the male thread is a G form and the female GL. The reference to GL15 I found on another site but now can't remember where.

[HOWARDTParticipant @howardt]

What I failed to say was that GL stands for glass thread, yes glass not gas.

[Neil WyattModerator @neilwyatt]

Thanks for the thingiverse link V* -he doesn't give sizes but I can import into something and measure.

Interesting link Howard, but I don't see a GL15 thread in that document unless I am reading it wrongly?

Neil

[JasonBModerator @jasonb]

Neil details of glass threads here but what you really need is that 3D scanner then you can scan the end of a tube and print off as many threaded adaptors as you like

[V8EngParticipant @v8eng]

Posted by Neil Wyatt on 27/07/2017 20:13:16:

Thanks for the thingiverse link V8 -he doesn't give sizes but I can import into something and measure.

Neil

I had assumed you were looking to make adapters for connecting the flexible nozzles to other coolant pipe sizes.

Further assumption was that you could download the files and modify them before 3D printing adapters to suit.

Obviously too many assumptions!

PS those screw on caps for the cartridges look handy.

Edited By V8Eng on 27/07/2017 20:36:54

[Chris Evans 6Participant @chrisevans6]

Many years ago I used to work on the moulds for the sealant tubes. The customer was Warrington based subsidiary of a German company called Fichbach or something sounding the same and spelt correctly. May be worth looking up and an email ?

[I.M. OUTAHEREParticipant @i-m-outahere]

Ok this time i went in armed !

I made a test piece out of alloy with 9 1/6 unc , 5 /8 unc and 16 x 2 metric female threads .

5/8 unc was spot on and 16mm screwed in partially but the pitch of the thread was wrong .

i tried different brands with the plastic cartridge and they all fit the 5/8 thread but made a discovery while i was at it , The metal cartridge have a different thread possibly 5/8 nf or 16mm extra fine so i checked,it against the bsp / npt thread checker in the store it fell between 1/4 bsp/npt and 3/8 bsp /npt .

Sika brand metal cartridge have a different thread again which is bigger than the others once agian a fine thread around 17mm dia .

Neil, you could turn up a test piece with a 5/8 x 12 thread or maybe print one ?

The irritating thing is you can buy adapters but they only state the thread size in one end – 1/4 npt for example and tell you that the other end is a cartridge thread 😡

[Neil WyattModerator @neilwyatt]

Posted by V8Eng on 27/07/2017 20:32:58:

Posted by Neil Wyatt on 27/07/2017 20:13:16:

Thanks for the thingiverse link V8 -he doesn't give sizes but I can import into something and measure.

Neil

I had assumed you were looking to make adapters for connecting the flexible nozzles to other coolant pipe sizes.

Further assumption was that you could download the files and modify them before 3D printing adapters to suit.

Obviously too many assumptions!PS those screw on caps for the cartridges look handy.

The only wrong assumption is that I 3D print everything, I was going to screwcut one…

[Neil WyattModerator @neilwyatt]

5/8 UNC shouldn't tax my skills too much, thanks XD

[Neil WyattModerator @neilwyatt]

Posted by JasonB on 27/07/2017 20:21:20:

Neil details of glass threads here but what you really need is that 3D scanner then you can scan the end of a tube and print off as many threaded adaptors as you like

Thanks Jason,

Actually what's useful there is the possibility of machining (or printing) custom caps for useful size glass containers.

Possible example: I have a squat little 'airwick' type bottle that I use for my neat cutting oil as its very stable. A cap with an inverted cone shape would help guide an oversize brush into the hole, so fewer splayed out hairs and remove excess oil from the brush.

[I.M. OUTAHEREParticipant @i-m-outahere]

Now in retaliation can you tell me what the thread on a 1lb fire extinguisher is ?

I want to use it one as an air tank for my airbrush compressor !

Ian.l

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