Thank You Sir And May I Have Another?
Chain tensioner ?
Posted by rlabutis
12/16/2010 at 04:40 PM
OK Beuller,dont let me down twice,,,,,,,Bueller?.
DAMN IT!!11!!Hey look everybody, Chinese ghost cities,all fresh and new...and deserted;
http://www.businessinsider.com/pictures-chinese-ghost-cities-2010-12?slop=1
No real estate bubble to see here so ,to quote officer Barbrady: Move along.Lawn Aerator.
Posted by balaams_ass
12/17/2010 at 09:46 AM
Good guesses so far, but no winners. The gear wheels are free spinning, so no tension is applied. Lawn aerators look a bit like this thing, but the wheels are rather spikey. The body of this device is a solid chunk of metal.
That 3/4 x 5 thread is very common; I guarantee you that you have several inexpensive things around the house that have that thread on the working end.
Rich, you keep coming up with these great links as non-sequitors. I think maybe we should bring you on board and get you to start posting along with the 3 of us?? Email me if interested!
Ok, days have gone by, and no further guesses. So either this one was a dud, or it got buried under all the other posts.
It’s the DDT concrete delamination testing tool made by Albion Engineering.
A big fat crayon marker goes in the top hole and is held in place by the little bolt with the plastic handle on it., A garage broom handle or other kind of extension pole screws into the lower hole. Broom handles use that very common 3/4” x 5 thread.
You run the tool up and down bare concrete walls or ceilings, and if the clickety sound of the gear teeth going over the concrete changes, it indicates hollow spots - possibly delamination - under the surface. Turn the tool over and make a mark. I guess somebody comes by later with a jackhammer, digs out that spot, and refills it properly.
For checking poured floors for delamination, the usual practice is to drag a chain across them, and listen for a similar change in sound.
