A few whatsits

Dave Sherburne NY

Well-known Member
Went to an Auction last Saturday and got a couple of junk boxes. The only clue I have for you is, I also bought the metal lathe and the guy had a lot of metal working tools. In the first pictures the thing with teeth on it is marked in Threads P I. The bolt looking thing has grooves length ways instead of threads. The little short threaded things with the yellow tape are different thread sizes marked with PW for Pratt and Whitney. What are they for?
a167143.jpg

a167144.jpg

a167145.jpg

a167146.jpg
 
The bolt that has the groves going up and down is a tool for removing the precombustion chambers on a cat head. The little squares are thread chasers. One can see numbers on them. That is the treads per inch.
 
Wish I could help, but now you got me curious. Some very interesting tools you have. Since you mentioned that some of them have PW on them for Pratt & Whitney, who as you know, manufactured airplane engines, they were most likely used for repair or assembly of airplane engines as well as some of the other tools.
 
Got to agree with Curtis, the splined bolt is for precombustion chambers. The other tool, with the square with the TPI markings, is a piece out of an OD thread chaser (see the link below) that someone has put on a handle to clean up ID threads.

The piece with the two bends looks like it may be a driver for something, maybe a fuel pump, or a magneto, that can be used when repairing one. I say that because of what appear to be drive lugs on the larger diameter disc. If that's the case it probably, originally, had a handle on the one end that has been turned undersized, but the handle is missing.

The small, threaded pieces are probably hardened go/no go gauges for checking the tolerances of threaded holes.

The other two pieces I don't have a clue, nor even a not so good guess.
Thread chaser
 
PW was once a huge supplier of custom gages for many things. I have seen lots of PW plug and ring gages. I have a few old PW measuring tools.
 

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