Gallery, Projects and General > Neat Stuff
Micro DRO made from tyre tread depth gauge
Pete.:
Half-way through modding one of these. I haven't discarded the spring just flattened it out to give a light pre-load.
Managed to get 30mm of travel on mine :D
EDIT: here it is. Couldn't find a rubber band of the right size so I had to make a band from dressmaker's elastic (tried to get the elastic out of the wife's knickers but she wasn't in a forthcoming frame of mind :D).
Advantages are that you get a much longer travel than by using the spring, and the elastic is a lot lighter in spring weight so there's no chance of pushing the readout along against the magnetic force when the spring gets bound.
Disadvantages - well it's very Heath Robinson but seems to work well. Magnets came from a hard disk and were cut in half with an angle grinder.
dickda1:
Pete,
Bought 4 of them via Hong Kong a while ago for $4 a piece delivered and have been trying to figure out how to mod them for my lathe. I like your idea of loading them from the back. Putting a spring on the front wastes about a 1/3 of the possible travel.
My only concern is that I am sure to get these things covered in swarf. How to protect the inner mechanism?
-Dick
Marauder:
Ok Guys/Gals,As i had tried at 2 different EBay sites and had no luck getting any delivered to me with the above problems........Can some one please put the site on here for me,The EBay site that are still selling them £5 ones.Thanks." Allen "
Stilldrillin:
Allen.
My man's still selling.....
http://www.ebay.co.uk/itm/Digital-LCD-Tyre-Tread-Depth-Brake-Shoe-Pad-Gauge-0-1-/360385983921?pt=UK_Hand_Tools_Equipment&hash=item53e8adb5b1
David D
ksor:
--- Quote from: Stilldrillin on August 14, 2011, 05:50:26 AM ---Allen.
My man's still selling.....
http://www.ebay.co.uk/itm/Digital-LCD-Tyre-Tread-Depth-Brake-Shoe-Pad-Gauge-0-1-/360385983921?pt=UK_Hand_Tools_Equipment&hash=item53e8adb5b1
David D
--- End quote ---
Yeah, but not to Denmark ... what have we done to be excluded ! :bugeye:
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