[PSUBS-MAILIST] Finishing O-ring groove

[James Frankland via Personal_Submersibles]

I used a dremmel once to repair an O ring groove that I damaged.  It
couldn't be put back in the lathe and running something like this
around fixed it a treat.  (It was only a tiny score but stopped the

You could get the dremmel in and just hold it in the groove with the lathe
on really slow speed.

just a thought.


​

On 8 September 2017 at 08:31, Alan via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> I have been finishing some internal O-ring grooves in aluminium on the
> lathe,
> with sandpaper.
> The grooves are small; 3.4mm x 2mm. There was a bit of chatter after
> machining.
> I am wondering if there is a better way to finish them rather than folding
> up small
> bits of varying grades of sand paper & sticking my hand in the work. ( am
> being careful)
> Maybe an abrasive paste & a bent piece of wire of a similar diameter to
> the groove?
> The hole diameter is 60mm & the groove is only 4mm in from the face, but
> difficult
> to get a straight stick with sandpaper in to it on the correct angle. I
> have a few to do.
> Any suggestions thanks.
> Alan
>
> Sent from my iPad
>
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