Re: [DIYbio] Eppendorf 5415 centrifuge: How to remove the rotor?

Have you tried removing the circlip and seeing if the rotor can pull
off with that alone removed?

You can get by with needle-nose pliers sometimes, but they make
special pliers for circlips/c-clips:
http://www.crawfordtool.com/KN4421J21h_200l.gif

The other thing would be to try seeing if there were flat sections
machined below the rotor on the spindle, or a hole drilled through
that you could place a metal pin through to lock rotation. If neither
of those, then I might try an electric/pneumatic impact driver (they
apply quick rotational pulses to the drill bit/socket, one or two
'taps' might free it enough to finish by hand).

Of course try opposite rotation as Andreas mentioned first, too.

On Fri, Aug 19, 2016 at 11:18 AM, jarlemag <jarle.pahr@gmail.com> wrote:
> I recently bought an Eppendorf 5415D centrifuge, and have tried to remove
> the rotor for cleaning and inspection. I don't have a rotor key of the kind
> that is sold by Eppendorf, but the item description at
> http://www.capitolscientific.com/Eppendorf-022667181-Rotor-Key-for-Microcentrifuge-Models-5415-D-5415-R-10mm-Socket-Wrench
> seems to indicate it's just a standard 10 mm socket wrench, so I bough one
> of those. (https://www.amazon.com/gp/product/B0028N57SW). I attempted to use
> the socket wrench on the hexagonal part in the centre (see the picture), but
> that just makes the whole rotor turn. I tried to keep the rotor in place
> while turning the wrench, but that didn't work either (I couldn't keep the
> rotor still).
> If I try to lift the rotor upwards, the centrifuge hangs from it and I'm
> worried about damagaging it so I didn't try that very hard.
>
> The centrifuge manual
> (http://www.nist.gov/ncnr/upload/Eppendorf_5415R_Centrifuge_Manual.pdf)
> doesn't go into detail about how to remove the motor. It mentions bending
> the rotor to one side if it's stuck, but how do I know if it's stuck in the
> way which is solved by doing that?
>
> What do I need to do?
>
> Picture of the rotor:
> https://drive.google.com/file/d/0B9aq85qBYTsWZm5tamh0QWRJSFE/view?usp=sharing
>
> Best regards,
> JP
>
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--
-Nathan

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