stoichiometric_steve
National Hazard
Posts: 819
Registered: 14-12-2005
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Rotavap RE111 motor dismantling
My RE started to make serious noise, i suspect something is wrong in the gear drive. I tried to disassemble it, but to no avail. Does anybody have an
explosion drawing of the motor? Thanks!
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smuv
National Hazard
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Registered: 2-5-2007
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Post a pic, I disassembled one a long time ago, but can't remember how the bearing/motor area was setup on that model. In my case it was the same
problem, gears were stripped, the rotovap was making a lot of noise. The gear sets are expensive. Oh and you don't need to remove the motor to get
at that area.
FYI: I think the root cause of the problem was leaky seals on the rotovap which caused some solvent vapors to get into the gearbox.
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Panache
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Registered: 18-10-2007
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Mood: Instead of being my deliverance, she had a resemblance to a Kat named Frankenstein
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i just did this a few weeks ago, its tricky and i got held up until a friend figured it out for me, in the end it was a smuv said and my bearings were
corroded, i soaked them overnight in a mixture of miracle super release agent and silicion grease and the next morning they were fine and its been
running fine since. i'm sure you can also get replacement bearings. Another friend has the drawings i can chase them up if you like.
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smuv
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Good to know you had luck salvaging the bearings.
Another thing I should add just for completeness, when the teflon(?) vacuum seals that support the whole rotating assembly start to get worn out, the
rotovap also starts making loud whining noises, but only under vacuum. The noises are probably caused by air being sucked into the system by leaks in
this assembly.
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cauthom1497
Harmless
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Registered: 4-4-2011
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I would greatly appreciate a picture. I'm thinking of attempting to build one. The picture would help me a lot. I've seen one taken apart before
Its a fairly simple machine, just a pump, motor, and heating apparatus. The hardest parts are the bearing and the intricate glassware. I have access
to a glassblower who can make the glass condenser and solvent traps for me.
To this end, where would you go about buying/replacing the bearing?
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stoichiometric_steve
National Hazard
Posts: 819
Registered: 14-12-2005
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Mood: satyric
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Please, get them! I need my unit back in working order ASAP. Thanks! 
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