Gallery, Projects and General > Neat Stuff

Micro DRO made from tyre tread depth gauge

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Pete.:
I think you need the spring to keep the slider aligned. I just flattened mine so that it has very little friction.

John-Som:
This is my Mk lll version of the Micro DRO and IMHO the best so far in terms of both ease of construction  and use. As suggested by Aussie Jim I have dispensed with the use of springs to maintain contact with the lathe cross slide (or carriage) and fitted 3mm rare earth magnets to the tip of the probe.



Many thanks to Rob in Australia for the concept and Corvus Corax for bringing this useful little gizmo to our attention.

John-Som

dickda1:
John-Som,

Your post about using a magnet is simply brilliant!

I have some small cylindrical magnets with a appropriately sized bore that will fit my gauges.  As you say, this will eliminate the need for springs.
 :bow:

ksor:
> John-Som

Did you drill a hole in the magnet or ... ?

Stilldrillin:
John.
Love your Mk lll version!  :thumbup:

Such a simple/ clever solution......  :clap: :clap:

David D

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