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etack said:what do they need to be made out of?
The brew store has them by my house. made out of rubber they will be cheep, but PTFE they will be expensive.
Eric
mjgraham said:While I did not have one that big I bought some PTFE rod and made one.
http://www.ebay.com/itm/4086-TEFLON...735?pt=LH_DefaultDomain_0&hash=item2ea868813f
This person has other sizes also.
you sir are a genius!!!!!!!!!!!!! I searched and search for them at a reasonable price (cheep) and couldn't find it but now you have solved a great problem.mjgraham said:While I did not have one that big I bought some PTFE rod and made one.
http://www.ebay.com/itm/4086-TEFLON...735?pt=LH_DefaultDomain_0&hash=item2ea868813f
This person has other sizes also.
skippy said:Here's a tip - don't make the plug solid if you expect there to be any temperature variation. The thermal expansion of the plastic will break the neck after only modest heating. The first plug I made, I made solid and it split the neck of a a flask before it ever hit 50 C! The trick to avoiding this is to hollow out the plastic plug enough so that the plug is able to deform ever so slightly under the heat. After spending time at higher temperatures the deformation becomes noticeable on disassembly as the teflon doesn't have a 'memory' like other plastics.
skippy said:Here's a tip - don't make the plug solid if you expect there to be any temperature variation. The thermal expansion of the plastic will break the neck after only modest heating. The first plug I made, I made solid and it split the neck of a a flask before it ever hit 50 C! The trick to avoiding this is to hollow out the plastic plug enough so that the plug is able to deform ever so slightly under the heat. After spending time at higher temperatures the deformation becomes noticeable on disassembly as the teflon doesn't have a 'memory' like other plastics.
skippy said:Here's a tip - don't make the plug solid if you expect there to be any temperature variation. The thermal expansion of the plastic will break the neck after only modest heating. The first plug I made, I made solid and it split the neck of a a flask before it ever hit 50 C! The trick to avoiding this is to hollow out the plastic plug enough so that the plug is able to deform ever so slightly under the heat. After spending time at higher temperatures the deformation becomes noticeable on disassembly as the teflon doesn't have a 'memory' like other plastics.
rusty said:mjgraham said:While I did not have one that big I bought some PTFE rod and made one.
http://www.ebay.com/itm/4086-TEFLON...735?pt=LH_DefaultDomain_0&hash=item2ea868813f
This person has other sizes also.
Thank you, problem solved.
Barren Realms 007 said:rusty said:mjgraham said:While I did not have one that big I bought some PTFE rod and made one.
http://www.ebay.com/itm/4086-TEFLON...735?pt=LH_DefaultDomain_0&hash=item2ea868813f
This person has other sizes also.
Thank you, problem solved.
Hold on if you haven't bught that I might have somethig at the shop you can have.
qst42know said:I wonder how long a 2.4" slug of silicone would take to cure through while you watch?
I know real fast in the tube before you get a chance to use it is common. :lol:
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