I found a couple tools in some other things I bought and do not know what they are. The micrometer/adjustable tool appears to be for a drill or?? It has a knurled collar that is spring loaded. You pull the collar back (similar to a air hose quick coupling)to adjust the micrometer adjustment and it returns to a locked position after adjusting. The shaft turns all the way thru the tool and the end of the shaft is threaded up inside the base/foot area with what appears to be a 1/4 NF female thread. It has the name "Shrillo" a winged Diamond logo, with an S in the shield. and No. 6400 Los Angeles stamped in it. The other tool is marked No 115, Point Aligning Tool, KD Mfg., Lancaster PA. Pat. No. 2283723 Im not sure of the pat No as it is hard to read...
The first tool is for counter sinking aircraft flathead rivets. It is missing the cutting head.
Thanks: It didn't take long for the gurus to answer. I love this forum .... lots of knowledge here. "Art" I like the patent info. Im going to make copies and put with my new tool.... Bruce: I assume the cutter is like a wood screw countersink that is threaded to fit the threads on the shaft .??
The first tool is used to control the depth of countersinking a screw or rivet hole, or to control cutting depth of a rivet shaving tool. It is called a "Micro Stop".
Here is a sample from Aircraft Spruce website.
I'm going to ask - is there any value in those countersink tools? I have about 10 of them that my work was pitching a few years ago - thought I'd t-bay them and buy more T Tools.
I have two of the countersink tools and about 20 of the cutters in various sizes. They're real handy if you're a fabricator but become a drudgery to set up for one hole. I don't remember what I paid for mine on Ebay but it wasn't much. It was way back when there was tons of aircraft tooling going for cheap. I got my 5x riveter and a drawer full of dies and sets for pennies on the dollar. Most all of them were new or like new. When Boeing "scaled back" in Washington state, I think every shop within a 100 miles started dumping tools.