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Bedrock

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I bought the 1-1/4"tap and die set at an auction some years ago, but could never get the thing to work properly. Yesterday pm, I tried again with the same results. For the first time the screws holding the top plate came apart, and I could see that the threads below the cutter were blocked with old cuttings, which ensured that the thread was stripping.
Half an hour with a scriber and a very thin chisel cleared the problem, and with a couple of swipes with a diamond file to put a keen edge on the cutter, I produced a pair of very clean wooden screws with remarkably little fuss.

The tap needed some dressing to the leading edge, but with a little extra muscle, I have now the makings of a Moxon type vice.

Couldn't be more pleased - getting an old tool back into good working order.
 

Bedrock

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Andy

You could well be right. I was surprised at the ease of creating a male thread, compared with cutting metal threads. I now need to create or acquire a wrench for the tap. Gripping the rectangular end with a mole wrench was not as easy.
Mike
 

xy mosian

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Bedrock":3iatg2gp said:
Andy
I now need to create or acquire a wrench for the tap. Gripping the rectangular end with a mole wrench was not as easy.
Mike
Mike, I have just spent some time trying to find an image I just know I have. The image is of a wooden handle to use on tapered square shank augers. The interesting bit is the metal plate recessed in to form the drive for the shank. Such a thing may be applicable in your case.
I am lucky enough to have a Sargents, remember them?, 1 1/2" tap and die. My solution was, if I can find it, a square hole in a length of sash cramp bar. I hasten to add some other person had cut up the sash cramp.
xy
 

AndyT

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I know what you mean, AES, there's one in an old Marples catalogue. Another option, easier to find, is a tap wrench from an engineering supplier, making sure it's big enough for whatever size square top the tap has. This is quite a large one:

https://www.chronos.ltd.uk/acatalog/info_140120.html
 

Bedrock

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Thank you both. I probably have a length of steel I can create a rectangular hole in.

Mike
 

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