USALabs has ptfe ones for cheap
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@Xtractek I got this little guy in a lot of rotovap part seems relatively unused but when you turn it on the motor whirred but no movement. Any ideas before I hack it open blindly? Google comes up with basically zilch on this when I search “buchi roty-s”.
I’ve worked with almost all of the buchi models, but have never touched one of those. Sorry bud
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Thanks for the response probably gonna pull it apart next couple days and see what I can see
Post pics when you do.
I sure will, hopefully I don’t fuck it up would be nice to have a spare around, plus this one can just hook up to any old lab stand which I find dope.
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Look for a loose connection to the circuit board.
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I will for sure, this unit is weird it has no adjustment knob just an on off switch. When you switch it on the motor is making noise just no movement. I think it might be mechanical.
Here is another DIY roto just for fun!
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Here we go I removed the two screws pictured, pulled the motor out it has a “cork screw” type gear which runs a gear that turns the shaft. Super basic design. Nothing was noticeably wrong so I put it back together tested again and it works! I’m guessing it was slightly misaligned. I think it would be cool to get something custom made so it could hook up to a standard condenser and maybe try a variac for speed control.
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