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Chemosynthesis
International Hazard
Posts: 1071
Registered: 26-9-2013
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Definitely watching all your work. If this ends up looking reasonable enough for me to do in my spare time, I am getting a new vacuum, splash bulb and
dewar condenser.
edit: condenser, not dewar flask
[Edited on 29-10-2014 by Chemosynthesis]
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aga
Forum Drunkard
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Registered: 25-3-2014
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Quote: Originally posted by smaerd  | | Also aga I would like to correct your original post. My rotary evaporator does have a vacuum and I am not S.C. Wack hehehe. |
Yes (blush) apologies for my earlier errors.
(current and future errors will be apologised for later.)
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aga
Forum Drunkard
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The people saying that the rotating vacuum seal is all that is required are obviously right.
After a bit of pondering i think the glass box can bugger off, and a bit of drainpipe + a bicycle bearing and a tube of silicone sealant could
actually do the job a lot cheaper, and easier to home-fabricate.
Still waiting for 2 bits of glass to arrive to test this ...
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eesakiwi
Harmless
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Registered: 10-8-2005
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http://www.google.co.nz/imgres?imgurl=http://www.penfold.co.nz/msp.jpg&imgrefurl=http://www.penfold.co.nz/products_wormgearmotors.html&h=277&a
mp;w=400&tbnid=BOr4sf3us7-zCM:&zoom=1&q=reduction+drive+gearbox&docid=65FPoIhlOMEVlM&hl=en&ei=P09XVLWVDtbn8AX7koGgCQ&tbm=i
sch&client=ms-unknown&ved=0CEAQMygeMB4
I think this is the sort of gearbox needed. What you should do is have a look thru the cataloges at a bearing and seal store that sells this sort of
machinery.
In the catalogue you will find exactly what you want.
I would not be suprised if you actually found a rotary evaporator in the book either.
The only difference is that the speed control is in the unit, while normally the motor works at one speed.
A common use for this setup is to open the ventilation windows in a glass house.
They just put the shaft that controls the levers directly thru the gearbox.
Its 'keyed' in place.
But that's where you fit the long glass tube in a rotary evaporator.
From that motor/gearbox reduction drive model number, you will be able to find the correct seal for the evaporator.
If I can do it I will try and find the right part # in the next few days
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